Professor
Christian Medical College Vellore, Ida Scudder Road, Vellore – 632004, Tamil Nadu, India
George IA, Sudarsanam TD, Pulimood AB, Mathews MS. Acute abdomen: an unusual presentation of disseminated Penicillium marneffei infection. Indian J Med Microbiol. 2008 Apr-Jun;26(2):180-2. doi: 10.4103/0255-0857.40538. PMID: 18445960.
Manesh A, Mani RS, Pichamuthu K, Jagannati M, Mathew V, Karthik R, Abraham OC, Chacko G, Varghese GM. Case Report: Failure of Therapeutic Coma in Rabies Encephalitis. Am J Trop Med Hyg. 2018 Jan;98(1):207-210. doi: 10.4269/ajtmh.17-0153. Epub 2018 Jan 1. PMID: 29141755; PMCID: PMC5928693.
Kandathil AJ, Kannangai R, David S, Selvakumar R, Job V, Abraham OC, Sridharan G. Human immunodeficiency virus infection and levels of Dehydroepiandrosterone sulfate in plasma among Indians. Clin Diagn Lab Immunol. 2005 Sep;12(9):1117-8. doi: 10.1128/CDLI.12.9.1117-1118.2005. PMID: 16148181; PMCID: PMC1235806. Link
Kannangai R, Ramalingam S, Jesudason MV, Vijayakumar TS, Abraham OC, Zachariah A, Sridharan G. Correlation of CD4(+) T-Cell counts estimated by an immunocapture technique (Capcellia) with viral loads in human immunodeficiency virus-seropositive individuals. Clin Diagn Lab Immunol. 2001 Nov;8(6):1286-8. doi: 10.1128/CDLI.8.6.1286-1288.2001. PMID: 11687479; PMCID: PMC96265. Link
Kannangai R, Ramalingam S, Prakash KJ, Abraham OC, George R, Castillo RC, Schwartz DH, Jesudason MV, Sridharan G. Molecular confirmation of human immunodeficiency virus (HIV) type 2 in HIV-seropositive subjects in south India. Clin Diagn Lab Immunol. 2000 Nov;7(6):987-9. doi: 10.1128/cdli.7.6.987-989.2000. PMID: 11063512; PMCID: PMC95999. Link
Kannangai R, Ramalingam S, Prakash KJ, Abraham OC, George R, Castillo RC, Schwartz DH, Jesudason MV, Sridharan G. A peptide enzyme linked immunosorbent assay (ELISA) for the detection of human immunodeficiency virus type-2 (HIV-2) antibodies: an evaluation on polymerase chain reaction (PCR) confirmed samples. J Clin Virol. 2001 Aug;22(1):41-6. doi: 10.1016/s1386-6532(01)00170-6. PMID: 11418351. Link
George IA, Sudarsanam TD, Pulimood AB, Mathews MS. Acute abdomen: an unusual presentation of disseminated Penicillium marneffei infection. Indian J Med Microbiol. 2008 Apr-Jun;26(2):180-2. doi: 10.4103/0255-0857.40538. PMID: 18445960.
Manesh A, Mani RS, Pichamuthu K, Jagannati M, Mathew V, Karthik R, Abraham OC, Chacko G, Varghese GM. Case Report: Failure of Therapeutic Coma in Rabies Encephalitis. Am J Trop Med Hyg. 2018 Jan;98(1):207-210. doi: 10.4269/ajtmh.17-0153. Epub 2018 Jan 1. PMID: 29141755; PMCID: PMC5928693.
Kandathil AJ, Kannangai R, David S, Selvakumar R, Job V, Abraham OC, Sridharan G. Human immunodeficiency virus infection and levels of Dehydroepiandrosterone sulfate in plasma among Indians. Clin Diagn Lab Immunol. 2005 Sep;12(9):1117-8. doi: 10.1128/CDLI.12.9.1117-1118.2005. PMID: 16148181; PMCID: PMC1235806. Link
Kannangai R, Ramalingam S, Jesudason MV, Vijayakumar TS, Abraham OC, Zachariah A, Sridharan G. Correlation of CD4(+) T-Cell counts estimated by an immunocapture technique (Capcellia) with viral loads in human immunodeficiency virus-seropositive individuals. Clin Diagn Lab Immunol. 2001 Nov;8(6):1286-8. doi: 10.1128/CDLI.8.6.1286-1288.2001. PMID: 11687479; PMCID: PMC96265. Link
Kannangai R, Ramalingam S, Prakash KJ, Abraham OC, George R, Castillo RC, Schwartz DH, Jesudason MV, Sridharan G. Molecular confirmation of human immunodeficiency virus (HIV) type 2 in HIV-seropositive subjects in south India. Clin Diagn Lab Immunol. 2000 Nov;7(6):987-9. doi: 10.1128/cdli.7.6.987-989.2000. PMID: 11063512; PMCID: PMC95999. Link
Kannangai R, Ramalingam S, Prakash KJ, Abraham OC, George R, Castillo RC, Schwartz DH, Jesudason MV, Sridharan G. A peptide enzyme linked immunosorbent assay (ELISA) for the detection of human immunodeficiency virus type-2 (HIV-2) antibodies: an evaluation on polymerase chain reaction (PCR) confirmed samples. J Clin Virol. 2001 Aug;22(1):41-6. doi: 10.1016/s1386-6532(01)00170-6. PMID: 11418351. Link
Kuriakose, C. K., Mishra, A. K., Vanjare, H. A., Raju, A. and Abraham, O. C. Visual Disturbance in Patients with Cryptococcal Meningitis: The Road Ahead J Neurosci Rural Pract; 2017, 8 (1): 151-152 Link
Manavathu EK, Abraham OC, Chandrasekar PH. Isolation and in vitro susceptibility to amphotericin B, itraconazole and posaconazole of voriconazole-resistant laboratory isolates of Aspergillus fumigatus. Clin Microbiol Infect. 2001 Mar;7(3):130-7. doi: 10.1046/j.1469-0691.2001.00220.x. PMID: 11318811. Link
Manesh A, Barnabas R, Mani S, Karthik R, Abraham OC, Chacko G, Kannangai R, Varghese GM. Symptomatic HIV CNS viral escape among patients on effective cART. Int J Infect Dis. 2019 Jul;84:39-43. doi: 10.1016/j.ijid.2019.03.033. Epub 2019 Apr 2. PMID: 30951880. Link
Mathai E, Rolain JM, Verghese GM, Abraham OC, Mathai D, Mathai M, Raoult D. Outbreak of scrub typhus in southern India during the cooler months. Ann N Y Acad Sci. 2003 Jun;990:359-64. doi: 10.1111/j.1749-6632.2003.tb07391.x. PMID: 12860654. Link
Moorthy M, Chacko B, Ramakrishna K, Samuel P, Karthik G, Kalki RC, Abraham AM, Akhuj A, Valsan A, Abraham OC, Peter JV. Risk of pandemic (H1N1) 2009 virus infection among healthcare workers caring for critically ill patients with pandemic (H1N1) 2009 virus infection. J Hosp Infect. 2011 Apr;77(4):365-6. doi: 10.1016/j.jhin.2010.12.001. Epub 2011 Feb 12. PMID: 21316801. Link
Muthusamy D, Rao SS, Ramani S, Monica B, Banerjee I, Abraham OC, Mathai DC, Primrose B, Muliyil J, Wanke CA, Ward HD, Kang G. Multilocus genotyping of Cryptosporidium sp. isolates from human immunodeficiency virus-infected individuals in South India. J Clin Microbiol. 2006 Feb;44(2):632-4. doi: 10.1128/JCM.44.2.632-634.2006. PMID: 16455931; PMCID: PMC1392691. Link
Otterdal K, Janardhanan J, Astrup E, Ueland T, Prakash JA, Lekva T, Abraham OC, Thomas K, Damås JK, Mathews P, Mathai D, Aukrust P, Varghese GM. Increased endothelial and macrophage markers are associated with disease severity and mortality in scrub typhus. J Infect. 2014 Nov;69(5):462-9. doi: 10.1016/j.jinf.2014.06.018. Epub 2014 Jul 1. PMID: 24995849. Link
Paul N, Mathai E, Abraham OC, Mathai D. Emerging microbiological trends in Candiduria. Clin Infect Dis. 2004 Dec 1;39(11):1743-4. doi: 10.1086/426083. PMID: 15578392. Link
Paul TV, Asha HS, Thomas N, Seshadri MS, Rupali P, Abraham OC, Pulimood SA, Jose A. Hypovitaminosis D and bone mineral density in human immunodeficiency virus-infected men from India, with or without antiretroviral therapy. Endocr Pract. 2010 Jul-Aug;16(4):547-53. doi: 10.4158/EP09197.OR. PMID: 20150027.
Prakash JA, Abraham OC, Mathai E. Evaluation of tests for serological diagnosis of scrub typhus. Trop Doct. 2006 Oct;36(4):212-3. doi: 10.1258/004947506778604715. PMID: 17034691. Link
Rakesh P, Alex RG, Varghese GM, Mathew P, David T, Manipadam MT, Nair S, Abraham OC. Kikuchi-fujimoto disease: clinical and laboratory characteristics and outcome. J Glob Infect Dis. 2014 Oct;6(4):147-50. doi: 10.4103/0974-777X.145234. PMID: 25538452; PMCID: PMC4265829.
Ramakrishna K, Sampath S, Chacko J, Chacko B, Narahari DL, Veerendra HH, Moorthy M, Krishna B, Chekuri V, Raju RK, Shanmugasundaram D, Pichamuthu K, Abraham AM, Abraham O, Thomas K, Mathews P, Varghese GM, Rupali P, Peter JV. Clinical Profile and Predictors of Mortality of Severe Pandemic (H1N1) 2009 Virus Infection Needing Intensive Care: A Multi-Centre Prospective Study from South India. J Glob Infect Dis. 2012 Jul;4(3):145-52. doi: 10.4103/0974-777X.100569. PMID: 23055645; PMCID: PMC3459431.
Ramalingam VV, Demosthenes JP, Ghale BC, Rupali P, Varghese GM, Abraham OC, Kannangai R. Frequency of cross-resistance to rilpivirine and etravirine among HIV-1 subtype C infected individuals failing nevirapine/efavirenz based ART regimen. Infect Dis (Lond). 2019 Jan;51(1):71-74. doi: 10.1080/23744235.2018.1510182. Epub 2018 Oct 29. PMID: 30371136. Link
Sengupta M, Prabhakar AK, Satyendra S, Thambu D, Abraham OC, Balaji V, Chen HW, Chao CC, Ching WM, Prakash JA. Utility of Loop-mediated Isothermal Amplification Assay, Polymerase Chain Reaction, and ELISA for Diagnosis of Leptospirosis in South Indian Patients. J Glob Infect Dis. 2017 Jan-Mar;9(1):3-7. doi: 10.4103/0974-777X.192967. PMID: 28250618; PMCID: PMC5330041.
Paul H, Peter D, Pulimood SA, Abraham OC, Mathai E, Prasad JH, Kannangai R. Role of polymerase chain reaction in the diagnosis of Trichomonas vaginalis infection in human immunodeficiency virus-infected individuals from India (South). Indian J Dermatol Venereol Leprol. 2012 May-Jun;78(3):323-7. doi: 10.4103/0378-6323.95448. PMID: 22565432. Link
Sudarsanam TD, Rupali P, Tharyan P, Abraham OC, Thomas K. Pre-admission antibiotics for suspected cases of meningococcal disease. Cochrane Database Syst Rev. 2017 Jun 14;6(6):CD005437. doi: 10.1002/14651858.CD005437.pub4. PMID: 28613408; PMCID: PMC6481530.
Varghese GM, Abraham OC, Mathai D. Post-exposure prophylaxis for blood borne viral infections in healthcare workers. Postgrad Med J. 2003 Jun;79(932):324-8. doi: 10.1136/pmj.79.932.324. PMID: 12840120; PMCID: PMC1742734.
Varghese GM, Janardhanan J, Mahajan SK, Tariang D, Trowbridge P, Prakash JA, David T, Sathendra S, Abraham OC. Molecular epidemiology and genetic diversity of Orientia tsutsugamushi from patients with scrub typhus in 3 regions of India. Emerg Infect Dis. 2015 Jan;21(1):64-9. doi: 10.3201/eid2101.140580. PMID: 25530231; PMCID: PMC4285260.
Varghese GM, Janardhanan J, Mahajan SK, Tariang D, Trowbridge P, Prakash JA, David T, Sathendra S, Abraham OC. Molecular epidemiology and genetic diversity of Orientia tsutsugamushi from patients with scrub typhus in 3 regions of India. Emerg Infect Dis. 2015 Jan;21(1):64-9. doi: 10.3201/eid2101.140580. PMID: 25530231; PMCID: PMC4285260.
Varghese GM, Trowbridge P, Janardhanan J, Thomas K, Peter JV, Mathews P, Abraham OC, Kavitha ML. Clinical profile and improving mortality trend of scrub typhus in South India. Int J Infect Dis. 2014 Jun;23:39-43. doi: 10.1016/j.ijid.2014.02.009. Epub 2014 Mar 21. PMID: 24661931.
Sengupta M, Prabhakar AK, Satyendra S, Thambu D, Abraham OC, Balaji V, Chen HW, Chao CC, Ching WM, Prakash JA. Utility of Loop-mediated Isothermal Amplification Assay, Polymerase Chain Reaction, and ELISA for Diagnosis of Leptospirosis in South Indian Patients. J Glob Infect Dis. 2017 Jan-Mar;9(1):3-7. doi: 10.4103/0974-777X.192967. PMID: 28250618; PMCID: PMC5330041.
Ramalingam S, Kannangai R, Abraham OC, Subramanian S, Rupali P, Pulimood SA, Jesudason MV, Sridharan G. Chemokine profile among human immunodeficiency virus-1 (HIV-1) infected individuals from southern India. Indian J Med Res. 2008 Feb;127(2):133-9. PMID: 18403790.
Ramalingam S, Kannangai R, Vijayakumar TS, Mathai D, Abraham OC, Subramanian S, Rupali P, Jesudason MV, Sridharan G. Subtype & cytokine profiles of HIV infected individuals from south India. Indian J Med Res. 2005 Apr;121(4):226-34. PMID: 15817940.
Ramalingam S, Kannangai R, Vijayakumar TS, Subramanian S, Abraham OC, Rupali P, Jesudason MV, Sridharan G. Increased number of CCR5+ CD4 T cells among south Indian adults probably associated with the low frequency of X4 phenotype of HIV-1 in India. Indian J Med Res. 2002 Sep;116:90-5. PMID: 12619446.
Rao Ajjampur SS, Asirvatham JR, Muthusamy D, Gladstone BP, Abraham OC, Mathai D, Ward H, Wanke C, Kang G. Clinical features & risk factors associated with cryptosporidiosis in HIV infected adults in India. Indian J Med Res. 2007 Dec;126(6):553-7. PMID: 18219083; PMCID: PMC2673507.
Rupali P, Abraham OC, Zachariah A, Subramanian S, Mathai D. Aetiology of prolonged fever in antiretroviral-naïve human immunodeficiency virus-infected adults. Natl Med J India. 2003 Jul-Aug;16(4):193-9. PMID: 14606766.
Rupali P, Evangelynn SB, Abraham OC, Korula RJ, Shukla V, Thankachen R, Ponniah M, Subramanian S, Jeyaseelan V, Mathai D. Granulomatous hepatitis following open heart surgery with cardiopulmonary bypass. Natl Med J India. 2008 Sep-Oct;21(5):222-4. PMID: 19320320.
Rupali P, Mannam S, Bella A, John L, Rajkumar S, Clarence P, Pulimood SA, Samuel P, Karthik R, Abraham OC, Mathai D. Risk factors for mortality in a south Indian population on generic antiretroviral therapy. J Assoc Physicians India. 2012 Dec;60:11-4. PMID: 23781664.
Sachithanandham J, Kannangai R, Pulimood SA, Desai A, Abraham AM, Abraham OC, Ravi V, Samuel P, Sridharan G. Significance of Epstein-Barr virus (HHV-4) and CMV (HHV-5) infection among subtype-C human immunodeficiency virus-infected individuals. Indian J Med Microbiol. 2014 Jul-Sep;32(3):261-9. doi: 10.4103/0255-0857.136558. PMID: 25008818.
Sachithanandham J, Ramalingam VV, Raja J, Abraham OC, Pulimood SA, Kannangai R. Expression of cytokine-mRNA in peripheral blood mononuclear cell of human immunodeficiency virus-1 subtype C infected individuals with opportunistic viral infections from India (South). Indian J Med Microbiol. 2016 Jan-Mar;34(1):76-81. doi: 10.4103/0255-0857.174118. PMID: 26776123.
Sachithanandham J, Ramamurthy M, Kannangai R, Daniel HD, Abraham OC, Rupali P, Pulimood SA, Abraham AM, Sridharan G. Detection of opportunistic DNA viral infections by multiplex PCR among HIV infected individuals receiving care at a tertiary care hospital in South India. Indian J Med Microbiol. 2009 Jul-Sep;27(3):210-6. doi: 10.4103/0255-0857.53202. PMID: 19584500.
Sadashiv MS, Rupali P, Manesh A, Kannangai R, Abraham OC, Pulimood SA, Karthik R, Rajkumar S, Thomas K. Risk Factors of Clinical and Immunological Failure in South Indian Cohort on Generic Antiretroviral Therapy. J Assoc Physicians India. 2017 Dec;65(12):34-39. PMID: 29327520.
Sivadasan A, Abraham OC, Rupali P, Pulimood SA, Rajan J, Rajkumar S, Zachariah A, Kannangai R, Kandathil AJ, Sridharan G, Mathai D. High rates of regimen change due to drug toxicity among a cohort of South Indian adults with HIV infection initiated on generic, first-line antiretroviral treatment. J Assoc Physicians India. 2009 May;57:384-8. PMID: 19634284.
Srinidhi BV, Fletcher GJ, Sachidanantham J, Rupali P, Ramalingam VV, Demosthenes JP, Abraham OC, Pulimood SA, Rebekah G, Kannangai R. Effect of Interleukin-28B polymorphism on Interleukin-28 expression and immunological recovery amongst HIV-1-infected individuals following antiretroviral therapy. Indian J Med Microbiol. 2017 Oct-Dec;35(4):580-584. doi: 10.4103/ijmm.IJMM_17_299. PMID: 29405153.
Srinivasan A, Venkataraman S, Hansdak SG, Abraham OC, Mathai D. Hyperglycaemia as an indicator of concurrent acute pancreatitis in fulminant hepatic failure associated with hepatitis B infection. Singapore Med J. 2005 May;46(5):236-7. PMID: 15858694.
Abhilash KP, Mitra S, Arul JJ, Raj PM, Balaji V, Kannangai R, Thomas SA, Abraham OC. Changing paradigm of cryptococcal meningitis: an eight-year experience from a tertiary hospital in South India. Indian J Med Microbiol. 2015 Jan-Mar;33(1):25-9. doi: 10.4103/0255-0857.148372. PMID: 25559998.
Abhilash KP, Veeraraghavan B, Abraham OC. Epidemiology and outcome of bacteremia caused by extended spectrum beta-lactamase (ESBL)-producing Escherichia coli and Klebsiella spp. in a tertiary care teaching hospital in south India. J Assoc Physicians India. 2010 Dec;58 Suppl:13-7. PMID: 21563608.
Moorthy M, Samuel P, Peter JV, Vijayakumar S, Sekhar D, Verghese VP, Agarwal I, Moses PD, Ebenezer K, Abraham OC, Thomas K, Mathews P, Mishra AC, Lal R, Muliyil J, Abraham AM. Estimation of the burden of pandemic(H1N1)2009 in developing countries: experience from a tertiary care center in South India. PLoS One. 2012;7(9):e41507. doi: 10.1371/journal.pone.0041507. Epub 2012 Sep 5. PMID: 22957015; PMCID: PMC3434194. Link
Varghese GM, John R, Manesh A, Karthik R, Abraham OC. Clinical management of COVID-19. Indian J Med Res. 2020 May;151(5):401-410. doi: 10.4103/ijmr.IJMR_957_20. PMID: 32611911; PMCID: PMC7530435. Link
Varghese GM, Mathew A, Kumar S, Abraham OC, Trowbridge P, Mathai E. Differential diagnosis of scrub typhus meningitis from bacterial meningitis using clinical and laboratory features. Neurol India. 2013 Jan-Feb;61(1):17-20. doi: 10.4103/0028-3886.107919. PMID: 23466834.
Veeraraghavan B, Pragasam AK, Bakthavatchalam YD, Anandan S, Ramasubramanian V, Swaminathan S, Gopalakrishnan R, Soman R, Abraham OC, Ohri VC, Walia K. Newer β-Lactam/β-Lactamase inhibitor for multidrug-resistant gram-negative infections: Challenges, implications and surveillance strategy for India. Indian J Med Microbiol. 2018 Jul-Sep;36(3):334-343. doi: 10.4103/ijmm.IJMM_18_326. PMID: 30429384.
Abdul Kalam S, Carey RA, Antony J, Abraham OC. Acute infectious purpura fulminans: a case series from India. Trop Doct. 2020 Oct;50(4):330-334. doi: 10.1177/0049475520930622. Epub 2020 Jun 17. PMID: 32998655.
Abhilash, K. P. P., Patole, S., Jambugulam, M., Sathyendra, S., Mitra, S., Rebekah, G., Yadav, B., Veeraraghavan, B. and Abraham, O. C. Changing trends of infective endocarditis in India: A south Indian experience Journal of Cardiovascular Disease Research; 2017, 8 (2): 62-66 Link
Mathai E, Lloyd G, Cherian T, Abraham OC, Cherian AM. Serological evidence for the continued presence of human rickettsioses in southern India. Ann Trop Med Parasitol. 2001 Jun;95(4):395-8. doi: 10.1080/00034980120065804. PMID: 11454249.
Mathuram, A. J., Singh, S., Abraham, O. C., Zachariah, A., Rupali, P., Varghese, G. M., Karthik, R. and Clarence, P. Antiretroviral therapy under the national program: Experience of a single large centre in Southern India Journal of Clinical and Diagnostic Research; 2018, 12 (3): OC05-OC07
Ramalingam S, Kannangai R, Zachariah A, Mathai D, Abraham C. CD4 counts of normal and HIV-infected south Indian adults: do we need a new staging system? Natl Med J India. 2001 Nov-Dec;14(6):335-9. PMID: 11804363.
Kandathil AJ, Kannangai R, Abraham OC, Rupali P, Pulimood SA, Verghese VP, Grant P, Pillay D, Sridharan G. The frequency of HIV-I drug resistance mutations among treatment-naive individuals at a tertiary care centre in south India. Int J STD AIDS. 2009 Aug;20(8):522-6. doi: 10.1258/ijsa.2008.008403. PMID: 19625581.
Griffith M, Peter JV, Karthik G, Ramakrishna K, Prakash JA, Kalki RC, Varghese GM, Chrispal A, Pichamuthu K, Iyyadurai R, Abraham OC. Profile of organ dysfunction and predictors of mortality in severe scrub typhus infection requiring intensive care admission. Indian J Crit Care Med. 2014 Aug;18(8):497-502. doi: 10.4103/0972-5229.138145. PMID: 25136187; PMCID: PMC4134622.
Abhilash KPP, Patole S, Jambugulam M, Sathyendra S, Mitra S, Rebekah G, Yadav B, Veeraraghavan B, Abraham OC. Changing trends of Infective endocarditis in India: A South Indian experience. Journal of Cardiovascular Disease Research. 2017;8(2)56-60.
Kandathil AJ, Kannangai R, Verghese VP, Pulimood SA, Rupali P, Sridharan G, Grant P, Pillay D, Abraham OC. Drug resistant mutations detected by genotypic drug resistance testing in patients failing therapy in clade C HIV-1 infected individuals from India. Indian J Med Microbiol. 2009 Jul-Sep;27(3):231-6. doi: 10.4103/0255-0857.53205. PMID: 19584504.
Sengupta M, Prabhakar AK, Satyendra S, Thambu D, Abraham OC, Balaji V, Chen HW, Chao CC, Ching WM, Prakash JA. Utility of Loop-mediated Isothermal Amplification Assay, Polymerase Chain Reaction, and ELISA for Diagnosis of Leptospirosis in South Indian Patients. J Glob Infect Dis. 2017 Jan-Mar;9(1):3-7. doi: 10.4103/0974-777X.192967. PMID: 28250618; PMCID: PMC5330041.
Rakesh P, Alex RG, Varghese GM, Mathew P, David T, Manipadam MT, Nair S, Abraham OC. Kikuchi-fujimoto disease: clinical and laboratory characteristics and outcome. J Glob Infect Dis. 2014 Oct;6(4):147-50. doi: 10.4103/0974-777X.145234. PMID: 25538452; PMCID: PMC4265829.
Ahmed AS, Kundavaram AP, Sathyendra S, Abraham OC. Acute pancreatitis due to scrub typhus. J Glob Infect Dis. 2014 Jan;6(1):31-4. doi: 10.4103/0974-777X.127949. PMID: 24741229; PMCID: PMC3982354. Link
Asha HS, Seshadri MS, Paul TV, Abraham OC, Rupali P, Thomas N. Human immunodeficiency virus-associated lipodystrophy: an objective definition based on dual-energy x-ray absorptiometry-derived regional fat ratios in a South Asian population. Endocr Pract. 2012 Mar-Apr;18(2):158-69. doi: 10.4158/EP11139.OR. PMID: 21856599.
Astrup E, Janardhanan J, Otterdal K, Ueland T, Prakash JA, Lekva T, Strand ØA, Abraham OC, Thomas K, Damås JK, Mathews P, Mathai D, Aukrust P, Varghese GM. Cytokine network in scrub typhus: high levels of interleukin-8 are associated with disease severity and mortality. PLoS Negl Trop Dis. 2014 Feb 6;8(2):e2648. doi: 10.1371/journal.pntd.0002648. PMID: 24516677; PMCID: PMC3916254. Link
Boorugu H, Chrispal A, Gopinath KG, Chandy S, Prakash JJ, Abraham AM, Abraham OC, Thomas K. Central nervous system involvement in scrub typhus. Trop Doct. 2014 Jan;44(1):36-7. doi: 10.1177/0049475513512646. Epub 2013 Nov 12. PMID: 24226290. Link
Chandrasekar PH, Abraham OC, Klein J, Alangaden G, Chalasani G, Cassells L, Dansey R, Abella S, Karanes C, Peters W, Baynes R. Low infectious morbidity after intensive chemotherapy and autologous peripheral blood progenitor cell transplantation in the outpatient setting for women with breast cancer. Clin Infect Dis. 2001 Feb 15;32(4):546-51. doi: 10.1086/318715. Epub 2001 Feb 9. PMID: 11181116. Link
Chrispal A, Boorugu H, Gopinath KG, Chandy S, Prakash JA, Thomas EM, Abraham AM, Abraham OC, Thomas K. Acute undifferentiated febrile illness in adult hospitalized patients: the disease spectrum and diagnostic predictors - an experience from a tertiary care hospital in South India. Trop Doct. 2010 Oct;40(4):230-4. doi: 10.1258/td.2010.100132. Epub 2010 Sep 24. PMID: 20870680. Link
Chrispal A, Boorugu H, Gopinath KG, Prakash JA, Chandy S, Abraham OC, Abraham AM, Thomas K. Scrub typhus: an unrecognized threat in South India - clinical profile and predictors of mortality. Trop Doct. 2010 Jul;40(3):129-33. doi: 10.1258/td.2010.090452. Epub 2010 Apr 1. PMID: 20360426. Link
Gopinath KG, Chrispal A, Boorugu H, Chandy S, Prakash JJ, Abraham AM, Abraham OC, Thomas K. Clinico-epidemiological profile of seven adults with spotted fever from a tertiary care hospital in South India. Trop Doct. 2014 Apr;44(2):89-91. doi: 10.1177/0049475513515478. Epub 2013 Dec 11. PMID: 24334402.
Janardhanan J, Joseph Martin S, Astrup E, Veeramanikandan R, Aukrust P, Abraham OC, Varghese GM. Single-nucleotide polymorphisms in Toll-like receptor (TLR)-2, TLR4 and heat shock protein 70 genes and susceptibility to scrub typhus. J Hum Genet. 2013 Nov;58(11):707-10. doi: 10.1038/jhg.2013.89. Epub 2013 Aug 29. PMID: 23985798. Link
Janardhanan J, Prakash JA, Abraham OC, Varghese GM. Comparison of a conventional and nested PCR for diagnostic confirmation and genotyping of Orientia tsutsugamushi. Diagn Microbiol Infect Dis. 2014 May;79(1):7-9. doi: 10.1016/j.diagmicrobio.2013.11.030. Epub 2014 Jan 24. PMID: 24565850. Link
John BV, Jacob M, Abraham OC, Thomas S, Thankachan R, Shukla V. Aspergilloma in a hydatid cavity. Trop Doct. 2007 Apr;37(2):112-4. doi: 10.1177/004947550703700222. PMID: 17540100. Link
Kandathil AJ, Joseph AP, Kannangai R, Srinivasan N, Abraham OC, Pulimood SA, Sridharan G. HIV reverse transcriptase: structural interpretation of drug resistant genetic variants from India. Bioinformation. 2009 Aug 20;4(1):36-45. doi: 10.6026/97320630004036. PMID: 20011151; PMCID: PMC2770369.
Kandathil AJ, Joseph AP, Kannangai R, Srinivasan N, Abraham OC, Pulimood SA, Sridharan G. Structural basis of drug resistance by genetic variants of HIV type 1 clade c protease from India. AIDS Res Hum Retroviruses. 2009 May;25(5):511-9. doi: 10.1089/aid.2008.0102. PMID: 19400736.
Kandathil AJ, Kannangai R, Abraham OC, Pulimood SA, Jensen MA, Sridharan G. HIV-1 with predicted CXCR4 genotype identified in clade C from India. Mol Diagn Ther. 2009;13(1):19-24. doi: 10.1007/BF03256311. PMID: 19351212. Link
Kandathil AJ, Kannangai R, Abraham OC, Pulimood SA, Jensen MA, Sridharan G. A comparison of interpretation by three different HIV type 1 genotypic drug resistance algorithms using sequences from non-clade B HIV type 1 strains. AIDS Res Hum Retroviruses. 2009 Mar;25(3):315-8. doi: 10.1089/aid.2008.0177. PMID: 19292596. Link
Kandathil AJ, Kannangai R, Abraham OC, Pulimood SA, Sridharan G. Amino acid sequence divergence of Tat protein (exon1)of subtype B and C HIV-1 strains: Does it have implications for vaccine development? Bioinformation. 2009 Dec 12;4(6):237-41. doi: 10.6026/97320630004237. PMID: 20975916; PMCID: PMC2951709.
Kandathil AJ, Kannangai R, Abraham OC, Rupali P, Pulimood SA, Verghese VP, Grant P, Pillay D, Sridharan G. The frequency of HIV-I drug resistance mutations among treatment-naive individuals at a tertiary care centre in south India. Int J STD AIDS. 2009 Aug;20(8):522-6. doi: 10.1258/ijsa.2008.008403. PMID: 19625581.
Kandathil AJ, Kannangai R, David S, Nithyanandam G, Solomon S, Balakrishnan P, Abraham OC, Subramanian S, Rupali P, Verghese VP, Pulimood S, Sridharan G. Comparison of Microcapillary Cytometry Technology and Flow Cytometry for CD4+ and CD8+ T-Cell Estimation. Clin Diagn Lab Immunol. 2005 Aug;12(8):1006-9. doi: 10.1128/CDLI.12.8.1006-1009.2005. PMID: 16085920; PMCID: PMC1182191. Link
Kandathil AJ, Kannangai R, David S, Nithyanandam G, Solomon S, Balakrishnan P, Abraham OC, Subramanian S, Rupali P, Verghese VP, Pulimood S, Sridharan G. Comparison of Microcapillary Cytometry Technology and Flow Cytometry for CD4+ and CD8+ T-Cell Estimation. Clin Diagn Lab Immunol. 2005 Aug;12(8):1006-9. doi: 10.1128/CDLI.12.8.1006-1009.2005. PMID: 16085920; PMCID: PMC1182191. Link
Janardhanan J, Prakash JA, Abraham OC, Varghese GM. Comparison of a conventional and nested PCR for diagnostic confirmation and genotyping of Orientia tsutsugamushi. Diagn Microbiol Infect Dis. 2014 May;79(1):7-9. doi: 10.1016/j.diagmicrobio.2013.11.030. Epub 2014 Jan 24. PMID: 24565850.
Joseph G, Krishnaswami S, Baruah DK, Kuruttukulam SV, Abraham OC. Transseptal approach to aortography and carotid artery stenting in pulseless disease. Cathet Cardiovasc Diagn. 1997 Apr;40(4):416-20; discussion 421. doi: 10.1002/(sici)1097-0304(199704)40:4<416::aid-ccd23>3.0.co;2-j. PMID: 9096949. Link
Michael JS, Abraham OC, Mathai D, Mathews MS. Varied clinical manifestations of Penicillium marneffei in patients with human immunodeficiency virus: a report from south India. Mycoses. 2005 Mar;48(2):120-1. doi: 10.1111/j.1439-0507.2004.01080.x. PMID: 15743429.
Varghese GM, Abraham OC, Mathai D, Thomas K, Aaron R, Kavitha ML, Mathai E. Scrub typhus among hospitalised patients with febrile illness in South India: magnitude and clinical predictors. J Infect. 2006 Jan;52(1):56-60. doi: 10.1016/j.jinf.2005.02.001. PMID: 16368461.
Balaji V, Rajiv K, Abraham OC. Burkholderia pseudomallei recovered in an HIV-positive individual. Indian J Med Sci. 2008 Nov;62(11):456-8. doi: 10.4103/0019-5359.48457. PMID: 19265236.
Kannangai R, David S, Sundaresan VC, Sachithanandham J, Mani M, Abraham OC, Pulimood SA, Rupali P, Sridharan G. Frequency of transmitted drug resistance mutations among treatment-naïve HIV-1-infected individuals at a tertiary care centre in South India. Mol Diagn Ther. 2015 Oct;19(5):273-5. doi: 10.1007/s40291-015-0160-5. PMID: 26296335. Link
Kannangai R, Kandathil AJ, Ebenezer DL, Mathai E, Prakash AJ, Abraham OC, Sudarsanam TD, Pulimood SA, Selvakumar R, Job V, Sridharan G. Usefulness of alternate prognostic serum and plasma markers for antiretroviral therapy for human immunodeficiency virus type 1 infection. Clin Vaccine Immunol. 2008 Jan;15(1):154-8. doi: 10.1128/CVI.00193-07. Epub 2007 Nov 14. PMID: 18003813; PMCID: PMC2223864.
Kannangai R, Prakash KJ, Ramalingam S, Abraham OC, Mathews KP, Jesudason MV, Sridharan G. Peripheral CD4+/CD8+ T-lymphocyte counts estimated by an immunocapture method in the normal healthy south Indian adults and HIV seropositive individuals. J Clin Virol. 2000 Aug;17(2):101-8. doi: 10.1016/s1386-6532(00)00080-9. PMID: 10942090.
Knnangai, R., Shaji, R. V., Ramalingam, S., Jesudason, M. V., Abraham, O. C., George, R., Shanmugam, A. P., Schwartz, D. H. and Sridharan, G. HIV-2 subtype circulating in India (south) J Acquir Immune Defic Syndr; 2003, 33 (2): 219-22 Link
Michael JS, Abraham OC, Mathai D, Mathews MS. Varied clinical manifestations of Penicillium marneffei in patients with human immunodeficiency virus: a report from south India. Mycoses. 2005 Mar;48(2):120-1. doi: 10.1111/j.1439-0507.2004.01080.x. PMID: 15743429.
Padaki PA, Sachithanandham J, Isaac R, Ramalingam VV, Abraham OC, Pulimood SA, Kannangai R. The performance of reverse transcriptase assay for the estimation of the plasma viral load in HIV-1 and HIV-2 infections. Infect Dis (Lond). 2016;48(6):467-71. doi: 10.3109/23744235.2015.1122832. Epub 2015 Dec 11. PMID: 26654354. Link
Panmei K, Joseph AK, Rose W, Abraham OC, Mathuram AJ, Kumar S, Abraham AM. Direct cost of illness for dengue in hospitalized children and adults at a referral hospital in India. Int J Infect Dis. 2019 Jul;84S:S64-S67. doi: 10.1016/j.ijid.2019.02.033. Epub 2019 Feb 28. PMID: 30826484.
Paul N, Kannagai R, Robert K, Harikishan B, Rupali P, Abraham OC. A HIPS-mimic. J Intern Med. 2005 Dec;258(6):579-80. doi: 10.1111/j.1365-2796.2005.01574.x. PMID: 16313482. Link
Peedicayil A, Thiyagarajan K, Gnanamony M, Pulimood SA, Jeyaseelan V, Kannangai R, Lionel J, Abraham OC, Abraham P. Prevalence and risk factors for human papillomavirus and cervical intraepithelial neoplasia among HIV-positive women at a tertiary level hospital in India. J Low Genit Tract Dis. 2009 Jul;13(3):159-64. doi: 10.1097/LGT.0b013e31818fb40d. PMID: 19550213. Link
Peter JV, Jerobin J, Nair A, Bennett A, Samuel P, Chrispal A, Abraham OC, Mathews KP, Fleming JJ, Oommen A. Clinical profile and outcome of patients hospitalized with dimethyl and diethyl organophosphate poisoning. Clin Toxicol (Phila). 2010 Nov;48(9):916-23. doi: 10.3109/15563650.2010.528425. PMID: 21171848. Link
Rupali P, Abraham OC, Jesudason MV, John TJ, Zachariah A, Sivaram S, Mathai D. Treatment failure in typhoid fever with ciprofloxacin susceptible Salmonella enterica serotype Typhi. Diagn Microbiol Infect Dis. 2004 May;49(1):1-3. doi: 10.1016/j.diagmicrobio.2003.12.002. PMID: 15135492. Link
Rupali P, Palanikumar P, Shanthamurthy D, Peter JV, Kandasamy S, Zacchaeus NGP, Alexander H, Thangavelu P, Karthik R, Abraham OC, Michael JS, Paul H, Veeraraghavan B, Chacko B, Jeyaseelan V, Alangaden G, Prentiss T, Zervos MJ. Impact of an antimicrobial stewardship intervention in India: Evaluation of post-prescription review and feedback as a method of promoting optimal antimicrobial use in the intensive care units of a tertiary-care hospital. Infect Control Hosp Epidemiol. 2019 May;40(5):512-519. doi: 10.1017/ice.2019.29. PMID: 31084674. Link
Stall N, Rubin T, Michael JS, Mathai D, Abraham OC, Mathews P, Thomas K, John M, Daley P. Does solid culture for tuberculosis influence clinical decision making in India? Int J Tuberc Lung Dis. 2011 May;15(5):641-6. doi: 10.5588/ijtld.10.0195. PMID: 21756515.
Thuppal SV, Karthik R, Abraham OC, Wanke CA, Mwamburi M, Terrin N, Cohen JT, Mathai D, Muliyil J, Kang G. Cost estimation of first-line antiretroviral therapy with zidovudine/stavudine as the nucleoside backbone in India: a pilot study. J Int Assoc Provid AIDS Care. 2015 Mar-Apr;14(2):180-4. doi: 10.1177/2325957413500530. Epub 2013 Sep 11. PMID: 24027170.
Varghese GM, Janardhanan J, Trowbridge P, Peter JV, Prakash JA, Sathyendra S, Thomas K, David TS, Kavitha ML, Abraham OC, Mathai D. Scrub typhus in South India: clinical and laboratory manifestations, genetic variability, and outcome. Int J Infect Dis. 2013 Nov;17(11):e981-7. doi: 10.1016/j.ijid.2013.05.017. Epub 2013 Jul 26. PMID: 23891643.
Varghese GM, Janardhanan J, Ralph R, Abraham OC. The Twin Epidemics of Tuberculosis and HIV. Curr Infect Dis Rep. 2013 Feb;15(1):77-84. doi: 10.1007/s11908-012-0311-3. PMID: 23296510.
Chandy SJ, Michael JS, Veeraraghavan B, Abraham OC, Bachhav SS, Kshirsagar NA. ICMR programme on Antibiotic Stewardship, Prevention of Infection & Control (ASPIC). Indian J Med Res. 2014 Feb;139(2):226-30. PMID: 24718396; PMCID: PMC4001333.
Chrispal A, Boorugu H, Gopinath KG, Chandy S, Prakash JA, Thomas EM, Abraham AM, Abraham OC, Thomas K. Acute undifferentiated febrile illness in adult hospitalized patients: the disease spectrum and diagnostic predictors - an experience from a tertiary care hospital in South India. Trop Doct. 2010 Oct;40(4):230-4. doi: 10.1258/td.2010.100132. Epub 2010 Sep 24. PMID: 20870680.
Sachithanandham J, Kannangai R, Abraham AM, Fletcher GJ, Abraham OC, Daniel D, Pulimood SA. Human herpes virus-8 infections among subjects with human immunodeficiency virus infection and normal healthy individuals in India. Intervirology. 2013;56(4):253-7. doi: 10.1159/000349890. Epub 2013 Jun 11. PMID: 23774948.
Kandathil AJ, Kannangai R, David S, Selvakumar R, Job V, Abraham OC, Sridharan G. Human immunodeficiency virus infection and levels of Dehydroepiandrosterone sulfate in plasma among Indians. Clin Diagn Lab Immunol. 2005 Sep;12(9):1117-8. doi: 10.1128/CDLI.12.9.1117-1118.2005. PMID: 16148181; PMCID: PMC1235806.
Mitra S, Choudhari R, Nori H, Abhilash KP, Jayaseelan V, Abraham AM, Cherian AO, Prakash JA, Muliyil J. Comparative evaluation of validity and cost-benefit analysis of rapid diagnostic test (RDT) kits in diagnosis of dengue infection using composite reference criteria: A cross-sectional study from south India. J Vector Borne Dis. 2016 Mar;53(1):30-6. PMID: 27004576.
Stall N, Rubin T, Michael JS, Mathai D, Abraham OC, Mathews P, Thomas K, John M, Daley P. Does solid culture for tuberculosis influence clinical decision making in India? Int J Tuberc Lung Dis. 2011 May;15(5):641-6. doi: 10.5588/ijtld.10.0195. PMID: 21756515. Link
Mitra S, Choudhari R, Nori H, Abhilash KP, Jayaseelan V, Abraham AM, Cherian AO, Prakash JA, Muliyil J. Comparative evaluation of validity and cost-benefit analysis of rapid diagnostic test (RDT) kits in diagnosis of dengue infection using composite reference criteria: A cross-sectional study from south India. J Vector Borne Dis. 2016 Mar;53(1):30-6. PMID: 27004576.
Chrispal A, Boorugu H, Gopinath KG, Chandy S, Prakash JA, Thomas EM, Abraham AM, Abraham OC, Thomas K. Acute undifferentiated febrile illness in adult hospitalized patients: the disease spectrum and diagnostic predictors - an experience from a tertiary care hospital in South India. Trop Doct. 2010 Oct;40(4):230-4. doi: 10.1258/td.2010.100132. Epub 2010 Sep 24. PMID: 20870680.
Chrispal A, Boorugu H, Gopinath KG, Prakash JA, Chandy S, Abraham OC, Abraham AM, Thomas K. Scrub typhus: an unrecognized threat in South India - clinical profile and predictors of mortality. Trop Doct. 2010 Jul;40(3):129-33. doi: 10.1258/td.2010.090452. Epub 2010 Apr 1. PMID: 20360426.
Kandathil AJ, Kannangai R, David S, Nithyanandam G, Solomon S, Balakrishnan P, Abraham OC, Subramanian S, Rupali P, Verghese VP, Pulimood S, Sridharan G. Comparison of Microcapillary Cytometry Technology and Flow Cytometry for CD4+ and CD8+ T-Cell Estimation. Clin Diagn Lab Immunol. 2005 Aug;12(8):1006-9. doi: 10.1128/CDLI.12.8.1006-1009.2005. PMID: 16085920; PMCID: PMC1182191.
Varghese GM, John G, Thomas K, Abraham OC, Mathai D. Predictors of multi-organ dysfunction in heatstroke. Emerg Med J. 2005 Mar;22(3):185-7. doi: 10.1136/emj.2003.009365. PMID: 15735266; PMCID: PMC1726691. Link
Abhilash KP, Ahmed AS, Sathyendra S, Abraham OC. Acute pancreatitis due to malaria: A case report of five patients and review of literature. J Family Med Prim Care. 2016 Jul-Sep;5(3):691-694. doi: 10.4103/2249-4863.197302. PMID: 28217609; PMCID: PMC5290786. Link
Abhilash KP, Mitra S, Arul JJ, Raj PM, Balaji V, Kannangai R, Thomas SA, Abraham OC. Changing paradigm of cryptococcal meningitis: an eight-year experience from a tertiary hospital in South India. Indian J Med Microbiol. 2015 Jan-Mar;33(1):25-9. doi: 10.4103/0255-0857.148372. PMID: 25559998.
Thuppal SV, Wanke CA, Noubary F, Cohen JT, Mwamburi M, Ooriapdickal AC, Muliyil J, Kang G, Varghese GM, Rupali P, Karthik R, Sathasivam R, Clarance P, Pulimood SA, Peter D, George L. Toxicity and clinical outcomes in patients with HIV on zidovudine and tenofovir based regimens: a retrospective cohort study. Trans R Soc Trop Med Hyg. 2015 Jun;109(6):379-85. doi: 10.1093/trstmh/trv016. Epub 2015 Mar 15. PMID: 25778734; PMCID: PMC4542851.
Balasubramanian P, Mathew J, Cherian R, Abraham OC. Bilateral massive pleural effusion--a rare presentation of sarcoidosis. J Postgrad Med. 2005 Oct-Dec;51(4):335-6. PMID: 16388185.
Balasubramanian P, Mathew J, Cherian R, Abraham OC. Bilateral massive pleural effusion--a rare presentation of sarcoidosis. J Postgrad Med. 2005 Oct-Dec;51(4):335-6. PMID: 16388185.
Bharat A, Vedkumar M, Subhash HS, Abraham OC, Mathai D. Antituberculous therapy-induced toxicity. J Assoc Physicians India. 2003 May;51:522-4. PMID: 12974441.
Carey RA, Rupali P, Abraham OC, Kattula D. Does first line antiretroviral therapy increase the prevalence of cardiovascular risk factors in Indian patients?: A cross sectional study. J Postgrad Med. 2013 Oct-Dec;59(4):258-62. doi: 10.4103/0022-3859.123145. PMID: 24346381.
Korula A, Abraham A, Abubacker FN, Viswabandya A, Lakshmi KM, Abraham OC, Rupali P, Varghese GM, Michael JS, Srivastava A, Mathews V, George B. Invasive fungal infection following chemotherapy for acute myeloid leukaemia-Experience from a developing country. Mycoses. 2017 Oct;60(10):686-691. doi: 10.1111/myc.12646. Epub 2017 Jul 23. PMID: 28736936. Link
John BV, Jacob M, Abraham OC, Thomas S, Thankachan R, Shukla V. Aspergilloma in a hydatid cavity. Trop Doct. 2007 Apr;37(2):112-4. doi: 10.1177/004947550703700222. PMID: 17540100
Chacko ST, Chandy ST, Abraham OC, Swaminathan S, Varghese GM, Priscilla R, Mathai D. Pacemaker endocarditis caused by Pseudomonas aeruginosa treated successfully. J Assoc Physicians India. 2003 Oct;51:1021-2. PMID: 14719599.
Chandy S, Mitra S, Sathish N, Vijayakumar TS, Abraham OC, Jesudason MV, Abraham P, Yoshimatsu K, Arikawa J, Sridharan G. A pilot study for serological evidence of hantavirus infection in human population in south India. Indian J Med Res. 2005 Sep;122(3):211-5. PMID: 16251777.
Chordia P, Christopher S, Abraham OC, Muliyil J, Kang G, Ajjampur Ss. Risk factors for acquiring Strongyloides stercoralis infection among patients attending a tertiary hospital in south India. Indian J Med Microbiol. 2011 Apr-Jun;29(2):147-51. doi: 10.4103/0255-0857.81797. PMID: 21654109. Link
George IA, Mathews MS, Karthik R, John L, Sundar A, Abraham OC, Joseph V. Fatal cerebral abscess caused by Cladophialophora bantiana. J Assoc Physicians India. 2008 Jun;56:470-2. PMID: 18822631.
George T, Carey RAB, Abraham OC, Sebastian T, Faith MF. Trainee doctors in medicine prefer case-based learning compared to didactic teaching. J Family Med Prim Care. 2020 Feb 28;9(2):580-584. doi: 10.4103/jfmpc.jfmpc_1093_19. PMID: 32318385; PMCID: PMC7113923. Link
John AO, Paul H, Vijayakumar S, Anandan S, Sudarsan T, Abraham OC, Balaji V. Mortality from acinetobacter infections as compared to other infections among critically ill patients in South India: A prospective cohort study. Indian J Med Microbiol. 2020 Jan-Mar;38(1):24-31. doi: 10.4103/ijmm.IJMM_19_492. PMID: 32719205. Link
Jose VJ, Gupta SN, Jose S, Chacko B, Abraham PK, Abraham OC, John B, Chandy ST. Blood-filled cysts of heart. Indian Heart J. 2004 Mar-Apr;56(2):174-5. PMID: 15377144.
Kandathil AJ, Kannangai R, Abraham OC, Sudarsanam TD, Pulimood SA, Sridharan G. Genotypic resistance profile of HIV-1 protease gene: a preliminary report from Vellore, south India. Indian J Med Microbiol. 2008 Apr-Jun;26(2):151-4. doi: 10.4103/0255-0857.40530. PMID: 18445952.
Kandathil AJ, Kannangai R, Verghese VP, Pulimood SA, Rupali P, Sridharan G, Grant P, Pillay D, Abraham OC. Drug resistant mutations detected by genotypic drug resistance testing in patients failing therapy in clade C HIV-1 infected individuals from India. Indian J Med Microbiol. 2009 Jul-Sep;27(3):231-6. doi: 10.4103/0255-0857.53205. PMID: 19584504.
Kannangai R, Kandathil AJ, Ebenezer DL, Nithyanandam G, Samuel P, Abraham OC, Sudarsanam TD, Pulimood SA, Sridharan G. Evidence for lower CD4+ T cell and higher viral load in asymptomatic HIV-1 infected individuals of India: implications for therapy initiation. Indian J Med Microbiol. 2008 Jul-Sep;26(3):217-21. doi: 10.4103/0255-0857.42031. PMID: 18695317.
Kannangai R, Ramalingam S, Vijayakumar TS, Vincent AA, Abraham OC, Subramanian S, Rupali P, Mathai D, Jesudason MV, Sridharan G. The immunological and virological response in human immunodeficiency virus type-1 (HIV-1) infected Indian individuals on HAART therapy: a one-year follow up study. Indian J Med Microbiol. 2003 Oct-Dec;21(4):274-6. PMID: 17643043.
Karthik G, Iyadurai R, Ralph R, Prakash V, Abhilash KPP, Sathyendra S, Abraham OC, Truman C, Reginald A. Acute oleander poisoning: A study of clinical profile from a tertiary care center in South India. J Family Med Prim Care. 2020 Jan 28;9(1):136-140. doi: 10.4103/jfmpc.jfmpc_632_19. PMID: 32110579; PMCID: PMC7014840.
Kaul S, Brahmadathan KN, Jagannati M, Sudarsanam TD, Pitchamuthu K, Abraham OC, John G. One year trends in the gram-negative bacterial antibiotic susceptibility patterns in a medical intensive care unit in South India. Indian J Med Microbiol. 2007 Jul;25(3):230-5. doi: 10.4103/0255-0857.34764. PMID: 17901640. Link
Kaul S, Brahmadathan KN, Jagannati M, Sudarsanam TD, Pitchamuthu K, Abraham OC, John G. One year trends in the gram-negative bacterial antibiotic susceptibility patterns in a medical intensive care unit in South India. Indian J Med Microbiol. 2007 Jul;25(3):230-5. doi: 10.4103/0255-0857.34764. PMID: 17901640. Link
Kaul S, Brahmadathan KN, Jagannati M, Sudarsanam TD, Pitchamuthu K, Abraham OC, John G. One year trends in the gram-negative bacterial antibiotic susceptibility patterns in a medical intensive care unit in South India. Indian J Med Microbiol. 2007 Jul;25(3):230-5. doi: 10.4103/0255-0857.34764. PMID: 17901640. Link
Lionel J, Mathai M, Abraham OC, Cherian T. Management of HIV infection in pregnancy: possible guidelines and their basis. Natl Med J India. 2003 Mar-Apr;16(2):94-7. PMID: 12816189.
Mathai E, Rajkumari R, Kuruvilla PJ, Kirubakaran H, Brahmadathan KN, Inbamalar U, Abraham OC. Evaluation of serological tests for the diagnosis of tuberculosis. Indian J Pathol Microbiol. 2002 Jul;45(3):303-5. PMID: 12785171.
Mehta Y, Chaudhry D, Abraham OC, Chacko J, Divatia J, Jagiasi B, Kar A, Khilnani GC, Krishna B, Kumar P, Mani RK, Rao BK, Singh PK, Singh S, Tiwary P, Wattal C, Govil D, Dixit S, Samavedam S. Critical Care for COVID-19 Affected Patients: Position Statement of the Indian Society of Critical Care Medicine. Indian J Crit Care Med. 2020 Apr;24(4):222-241. doi: 10.5005/jp-journals-10071-23395. PMID: 32565632; PMCID: PMC7297240. Link
Mitra S, Karthik R, Balaji V, George IA, Kapil A, Abraham OC. Quinolone-resistant Salmonella enterica Serovar typhi presenting as acute fulminant hepatitis. J Assoc Physicians India. 2009 Apr;57:338-9. PMID: 19702041.
Paul H, Peter D, Pulimood SA, Abraham OC, Mathai E, Prasad JH, Kannangai R. Role of polymerase chain reaction in the diagnosis of Trichomonas vaginalis infection in human immunodeficiency virus-infected individuals from India (South). Indian J Dermatol Venereol Leprol. 2012 May-Jun;78(3):323-7. doi: 10.4103/0378-6323.95448. PMID: 22565432. Link
Peter, J. V., Abraham, O. C., George, S., Brahmadathan, K. N. and Mathai, D. Toxic strep syndrome: J Assoc Physicians India; 1993, 41 (3): 175-6
Raju AZ, Mathai D, Jesudasan M, Suresh M, Kaur A, Abraham OC, Pulimood BM. Nonagglutinable Vibrio cholerae septicaemia. J Assoc Physicians India. 1990 Sep;38(9):665-6. PMID: 2266091.
Ramalingam S, Kannangai R, Abraham OC, Subramanian S, Rupali P, Pulimood SA, Jesudason MV, Sridharan G. Investigation of apoptotic markers among human immunodeficiency virus (HIV-1) infected individuals. Indian J Med Res. 2008 Dec;128(6):728-33. PMID: 19246796.
Balaji V, Rajiv K, Abraham OC. Burkholderia pseudomallei recovered in an HIV-positive individual. Indian J Med Sci. 2008 Nov;62(11):456-8. doi: 10.4103/0019-5359.48457. PMID: 19265236.
Paul N, Mathai E, Abraham OC, Michael JS, Mathai D. Factors associated with candiduria and related mortality. J Infect. 2007 Nov;55(5):450-5. doi: 10.1016/j.jinf.2007.06.010. Epub 2007 Aug 16. PMID: 17706785.
Michael JS, Abraham OC, Mathai. D, Mathews MS. Varied clinical presentation of immunocompromised patients infected with Penicillummarneffei. – A report of 4 cases.Mycoses.2005 ; 48(2):120-1.
Manavathu EK, Abraham OC, Chandrasekar PH. Isolation and in vitro susceptibility to amphotericin B, itraconazole and posaconazole of voriconazole-resistant laboratory isolates of Aspergillus fumigatus. Clin Microbiol Infect. 2001 Mar;7(3):130-7. doi: 10.1046/j.1469-0691.2001.00220.x. PMID: 11318811.
Abraham OC, Manavathu EK, Cutright JL, Chandrasekar PH. In vitro susceptibilities of Aspergillus species to voriconazole, itraconazole, and amphotericin B. Diagn Microbiol Infect Dis. 1999 Jan;33(1):7-11. doi: 10.1016/s0732-8893(98)00102-3. PMID: 9990469.
Michael JS, Lalitha MK, Cherian T, Thomas K, Mathai D, Abraham OC, Brahmadathan.K.N. Evaluation of polymerase chain reaction for rapid diagnosis of tuberculous meningitis. Indian J Tuberc. 2002; 49: 133-137
Ghafur A, Mathai D, Muruganathan A, Jayalal JA, Kant R, Chaudhary D, Prabhash K, Abraham OC, Gopalakrishnan R, Ramasubramanian V, Shah SN, Pardeshi R, Huilgol A, Kapil A, Gill J, Singh S, Rissam HS, Todi S, Hegde BM, Parikh P. The Chennai Declaration: a roadmap to tackle the challenge of antimicrobial resistance. Indian J Cancer. 2013 Jan-Mar;50(1):71-3. doi: 10.4103/0019-509X.104065. PMID: 23713050.
Srikrishna G, Mathai D, Abraham OC, Kaur A, Kanagasabapathy AS, Pulimood BM. IgG multiple myeloma and alloalbuminemia: as unusual association. J Assoc Physicians India. 1994 Apr;42(4):331-2. PMID: 7860557.
Stephen G, George O, Mathai D, Kaur A, Abraham OC. Dapsone syndrome. J Assoc Physicians India. 1994 Jan;42(1):72-3. PMID: 7836258.
Subramanian S, Abraham OC, Rupali P, Zachariah A, Mathews MS, Mathai D. Disseminated histoplasmosis. J Assoc Physicians India. 2005 Mar;53:185-9. PMID: 15926599.
Mathai D, Abraham A.M, John K.R, Jesudason M.V, Lalitha M.K, Thomas M, Abraham O.C, John TJ. Randomised Controlled Study of Chloramphenicol vs Ofloxacin in the Treatment of Enteric Fever : A Pharmacoeconomic Analysis J Assoc Physicians India.1998, 46 (12): 991-997.
Thuppal SV, Karthik R, Abraham OC, Wanke CA, Mwamburi M, Terrin N, Cohen JT, Mathai D, Muliyil J, Kang G. Cost estimation of first-line antiretroviral therapy with zidovudine/stavudine as the nucleoside backbone in India: a pilot study. J Int Assoc Provid AIDS Care. 2015 Mar-Apr;14(2):180-4. doi: 10.1177/2325957413500530. Epub 2013 Sep 11. PMID: 24027170.
Manesh A, Mani RS, Pichamuthu K, Jagannati M, Mathew V, Karthik R, Abraham OC, Chacko G, Varghese GM. Case Report: Failure of Therapeutic Coma in Rabies Encephalitis. Am J Trop Med Hyg. 2018 Jan;98(1):207-210. doi: 10.4269/ajtmh.17-0153. Epub 2018 Jan 1. PMID: 29141755; PMCID: PMC5928693.
George AJ, Thomas C, Mathew DE, Jesudasan MR, Abraham OC, Rupali P, Singh B, Samuel R, Gaikwad P, Moorthy M. Viral RNA in peritoneal, rectal, and blood samples from surgical patients with COVID-19. Br J Surg. 2022 Jun 17:znac045. doi: 10.1093/bjs/znac045. Epub ahead of print. PMID: 35714204.
Muthu V, Agarwal R, Patel A, Kathirvel S, Abraham OC, Aggarwal AN, Bal A, Bhalla AS, Chhajed PN, Chaudhry D, Garg M, Guleria R, Krishnan RG, Kumar A, Maheshwari U, Mehta R, Mohan A, Nath A, Patel D, Rudramurthy SM, Saxena P, Sethuraman N, Singhal T, Soman R, Thangakunam B, Varghese GM, Chakrabarti A. Definition, diagnosis, and management of COVID-19-associated pulmonary mucormycosis: Delphi consensus statement from the Fungal Infection Study Forum and Academy of Pulmonary Sciences, India. Lancet Infect Dis. 2022 Apr 4:S1473-3099(22)00124-4. doi: 10.1016/S1473-3099(22)00124-4. Epub ahead of print. PMID: 35390293; PMCID: PMC8979562.
Padaki PA, Sachithanandham J, Isaac R, Ramalingam VV, Abraham OC, Pulimood SA, Kannangai R. The performance of reverse transcriptase assay for the estimation of the plasma viral load in HIV-1 and HIV-2 infections. Infect Dis (Lond). 2016;48(6):467-71. doi: 10.3109/23744235.2015.1122832. Epub 2015 Dec 11. PMID: 26654354.
Kaswala C, Schmiedel Y, Kundu D, George MM, Dayanand D, Devasagayam E, Manesh S A, Kumar SS, Michael JS, Ninan MM, Chacko G, Zachariah A, Sathyendra S, Hansdak SG, Iyadurai R, Christopher DJ, Gupta R, Karthik R, Abraham OC, Varghese GM. Accuracy of Gene Xpert MTB/RIF Ultra for the diagnosis of tuberculosis in adult patients: A retrospective cohort study. Int J Infect Dis. 2022 Jul 7:S1201-9712(22)00410-6. doi: 10.1016/j.ijid.2022.07.016. Epub ahead of print. PMID: 35811084. Link
Kaswala C, Schmiedel Y, Kundu D, George MM, Dayanand D, Devasagayam E, S AM, Kumar SS, Michael JS, Ninan MM, Chacko G, Zachariah A, Sathyendra S, Hansdak SG, Iyadurai R, Christopher DJ, Gupta R, Karthik R, Abraham OC, Varghese GM. Accuracy of Xpert MTB/RIF Ultra for the diagnosis of tuberculosis in adult patients: a retrospective cohort study. Int J Infect Dis. 2022 Sep;122:566-568. doi: 10.1016/j.ijid.2022.07.016. Epub 2022 Jul 8. PMID: 35811084.
Kuriakose CK, Mishra AK, Vanjare HA, Raju A, Abraham OC. Visual Disturbance in Patients with Cryptococcal Meningitis: The Road Ahead. J Neurosci Rural Pract. 2017 Jan-Mar;8(1):151-152. doi: 10.4103/0976-3147.193560. PMID: 28149110; PMCID: PMC5225709.
Abraham OC, Manavathu EK, Cutright JL, Chandrasekar PH. In vitro susceptibilities of Aspergillus species to voriconazole, itraconazole, and amphotericin B. Diagn Microbiol Infect Dis. 1999 Jan;33(1):7-11. doi: 10.1016/s0732-8893(98)00102-3. PMID: 9990469.
Abraham OC, Manavathu EK, Cutright JL, Chandrasekar PH. In vitro susceptibilities of Aspergillus species to voriconazole, itraconazole, and amphotericin B. Diagn Microbiol Infect Dis. 1999 Jan;33(1):7-11. doi: 10.1016/s0732-8893(98)00102-3. PMID: 9990469.
Abraham OC, Manavathu EK, Cutright JL, Chandrasekar PH. In vitro susceptibilities of Aspergillus species to voriconazole, itraconazole, and amphotericin B. Diagn Microbiol Infect Dis. 1999 Jan;33(1):7-11. doi: 10.1016/s0732-8893(98)00102-3. PMID: 9990469.
Kandathil AJ, Kannangai R, David S, Nithyanandam G, Solomon S, Balakrishnan P, Abraham OC, Subramanian S, Rupali P, Verghese VP, Pulimood S, Sridharan G. Comparison of Microcapillary Cytometry Technology and Flow Cytometry for CD4+ and CD8+ T-Cell Estimation. Clin Diagn Lab Immunol. 2005 Aug;12(8):1006-9. doi: 10.1128/CDLI.12.8.1006-1009.2005. PMID: 16085920; PMCID: PMC1182191.
Samuel SV, George TK, Gopinathan VR, Abraham OC. Community-acquired fungal pyelonephritis with renal infarction and gangrene of the colon: an uncommon diagnosis. BMJ Case Rep. 2022 Feb 7;15(2):e241685. doi: 10.1136/bcr-2021-241685. PMID: 35131766; PMCID: PMC8823032.
Kundu D, Gautam P, Dayanand D, Gunasekaran K, Manesh A, Sebastian M, Abhilash KPP, Zachariah A, George T, Sathyendra S, Hansdak SG, Abraham OC, Iyadurai R, Thangakunam B, Gupta R, Karthik R, Moorthy M, Varghese GM. The role and diagnostic accuracy of serology for COVID-19. BMC Infect Dis. 2022 Apr 19;22(1):390. doi: 10.1186/s12879-022-0736-1y. PMID: 35439957; PMCID: PMC9017961. Link
George AJ, Thomas C, Mathew DE, Jesudasan MR, Abraham OC, Rupali P, Singh B, Samuel R, Gaikwad P, Moorthy M. Viral RNA in peritoneal, rectal, and blood samples from surgical patients with COVID-19. Br J Surg. 2022 Jul 15;109(8):772. doi: 10.1093/bjs/znac045. PMID: 35714204. Link
Rupali P, Garg D, Viggweswarupu S, Sudarsanam TD, Jeyaseelan V, Abraham OC. Etiology of Classic Fever of Unknown Origin (FUO) among Immunocompetent Indian Adults. J Assoc Physicians India. 2019 Jan;67(1):21-26. PMID: 30935167. Link
Manesh A, Mani RS, Pichamuthu K, Jagannati M, Mathew V, Karthik R, Abraham OC, Chacko G, Varghese GM. Case Report: Failure of Therapeutic Coma in Rabies Encephalitis. Am J Trop Med Hyg. 2018 Jan;98(1):207-210. doi: 10.4269/ajtmh.17-0153. Epub 2018 Jan 1. PMID: 29141755; PMCID: PMC5928693.
S AM, Gautam P, D SSK, Mannam P, Jasper A, Gunasekaran K, Thomas NC, Benjamin RN, Inbaraj LR, Devasagayam E, George MM, Karthik R, Abraham OC, Vanjare HA, Sivadasan A, Prabhakar AT, Jonathan E, Michael JS, Samuel P, Varghese GM. Effectiveness of adjunctive high dose infliximab therapy to improve disability free survival among patients with severe CNS tuberculosis: a matched retrospective cohort study. Clin Infect Dis. 2023 Jul 5:ciad401. doi: 10.1093/cid/ciad401. Epub ahead of print. PMID: 37405816. Link
Kannangai R, David S, Sundaresan VC, Sachithanandham J, Mani M, Abraham OC, Pulimood SA, Rupali P, Sridharan G. Frequency of transmitted drug resistance mutations among treatment-naïve HIV-1-infected individuals at a tertiary care centre in South India. Mol Diagn Ther. 2015 Oct;19(5):273-5. doi: 10.1007/s40291-015-0160-5. PMID: 26296335.
Huang Z, George MM, Tan YR, Natarajan K, Devasagayam E, Tay E, Manesh A, Varghese GM, Abraham OC, Zachariah A, Yap P, Lall D, Chow A. Are physicians ready for precision antibiotic prescribing? A qualitative analysis of the acceptance of artificial intelligence-enabled clinical decision support systems in India and Singapore. J Glob Antimicrob Resist. 2023 Dec;35:76-85. doi: 10.1016/j.jgar.2023.08.016. Epub 2023 Aug 26. PMID: 37640155; PMCID: PMC10684720.
Kannan K, John R, Kundu D, Dayanand D, Abhilash KPP, Mathuram AJ, Zachariah A, Sathyendra S, Hansdak SG, Abraham OC, Gunasekaran K, Iyadurai R, Abraham AM, Prakash JAJ, Yesudhason BL, Veeraraghavan B, Kavitha ML, Jose LR, Sumana MN, Saravu K, Varghese GM. Performance of molecular and serologic tests for the diagnosis of scrub typhus. PLoS Negl Trop Dis. 2020 Nov 12;14(11):e0008747. doi: 10.1371/journal.pntd.0008747. PMID: 33180784; PMCID: PMC7660479.
Varghese GM, John R, Manesh A, Karthik R, Abraham OC. Authors' response. Indian J Med Res. 2020 Jul & Aug;152(1 & 2):151-152. doi: 10.4103/0971-5916.294037. PMID: 32883920; PMCID: PMC7853270.
Manesh A, Gautam P, Kumar D SS, Mannam P, Jasper A, Gunasekaran K, Thomas NC, Benjamin RN, Inbaraj LR, Devasagayam E, George MM, Karthik R, Abraham OC, Vanjare HA, Sivadasan A, Appaswamy PT, Jonathan E, Michael JS, Samuel P, Varghese GM. Effectiveness of Adjunctive High-Dose Infliximab Therapy to Improve Disability-Free Survival Among Patients With Severe Central Nervous System Tuberculosis: A Matched Retrospective Cohort Study. Clin Infect Dis. 2023 Nov 17;77(10):1460-1467. doi: 10.1093/cid/ciad401. PMID: 37405816.
Thomas S, Duraisamy SK, Ahmed R, Abraham A, Vishwabandhya A, Mathews V, Srivastava A, Samuel P, Kannangai R, Abraham OC, George B, Abraham AM. Early detection, reactivation of cytomegalovirus DNA & immediate early (IE)-mRNA expression in hematopoietic stem cell-transplant patients. Indian J Med Microbiol. 2023 Dec 19;47:100521. doi: 10.1016/j.ijmmb.2023.100521. Epub ahead of print. PMID: 38072066.
John KJ, George TK, Joy M, John B, Abraham OC, Prasad J. Costs & outcomes of hospitalized scrub typhus infection in a tertiary hospital in south India. Indian J Med Res. 2023 Jun;157(6):559-567. doi: 10.4103/ijmr.IJMR_3917_20. PMID: 37530311; PMCID: PMC10466492.
