Maiwall R, Goel A, Pulimood AB, Babji S, Sophia J, Prasad C, Balasubramanian KA, Ramakrishna B, Kurian S, Fletcher GJ, Abraham P, Kang G, Ramakrishna BS, Elias E, Eapen CE. Investigation into celiac disease in Indian patients with portal hypertension. Indian J Gastroenterol. 2014 Nov;33(6):517-23. doi: 10.1007/s12664-014-0501-z. Epub 2014 Sep 18. PMID: 25231910.

Fletcher GJ, Eapen CE, Abraham P. Hepatitis B genotyping: The utility for the clinicians. Indian J Gastroenterol. 2020 Aug;39(4):315-320. doi: 10.1007/s12664-019-00995-y. PMID: 31617082.

Ranjan J, Ponnuvel S, Fletcher GJ, Anantharam R, Radhakrishnan K, Jeyaseelan V, Abraham P. Evaluation of dried blood spots as a feasible alternative to plasma for the detection and quantification of hepatitis c virus in a tropical setting: A pilot study. Indian J Med Microbiol. 2019 Jan-Mar;37(1):60-66. doi: 10.4103/ijmm.IJMM_19_12. PMID: 31424012.

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.

Ponnuvel S, Fletcher GJ, Anantharam R, Varughese S, David VG, Abraham P. Clinical utility of hepatitis C virus core antigen (HCVcAg) assay to identify active HCV infection in hemodialysis and renal transplant patients. PLoS One. 2021 Apr 22;16(4):e0250263. doi: 10.1371/journal.pone.0250263. PMID: 33886631; PMCID: PMC8061997.

Demosthenes JP, Fletcher GJ, Zachariah UG, Varghese GM, Pulimood SA, Abraham P, Kannangai R. Chronic Immune Activation Among Treatment Naïve HIV/ HBV Coinfected Individuals From Southern India. Curr HIV Res. 2021;19(4):332-341. doi: 10.2174/1570162X19666210506160642. PMID: 33970847.

Maiwall R, Goel A, Pulimood AB, Babji S, Sophia J, Prasad C, Balasubramanian KA, Ramakrishna B, Kurian S, Fletcher GJ, Abraham P, Kang G, Ramakrishna BS, Elias E, Eapen CE. Investigation into celiac disease in Indian patients with portal hypertension. Indian J Gastroenterol. 2014 Nov;33(6):517-23. doi: 10.1007/s12664-014-0501-z. Epub 2014 Sep 18. PMID: 25231910.

Fletcher GJ, Eapen CE, Abraham P. Hepatitis B genotyping: The utility for the clinicians. Indian J Gastroenterol. 2020 Aug;39(4):315-320. doi: 10.1007/s12664-019-00995-y. PMID: 31617082.

Ranjan J, Ponnuvel S, Fletcher GJ, Anantharam R, Radhakrishnan K, Jeyaseelan V, Abraham P. Evaluation of dried blood spots as a feasible alternative to plasma for the detection and quantification of hepatitis c virus in a tropical setting: A pilot study. Indian J Med Microbiol. 2019 Jan-Mar;37(1):60-66. doi: 10.4103/ijmm.IJMM_19_12. PMID: 31424012.

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.

Ponnuvel S, Fletcher GJ, Anantharam R, Varughese S, David VG, Abraham P. Clinical utility of hepatitis C virus core antigen (HCVcAg) assay to identify active HCV infection in hemodialysis and renal transplant patients. PLoS One. 2021 Apr 22;16(4):e0250263. doi: 10.1371/journal.pone.0250263. PMID: 33886631; PMCID: PMC8061997.

Demosthenes JP, Fletcher GJ, Zachariah UG, Varghese GM, Pulimood SA, Abraham P, Kannangai R. Chronic Immune Activation Among Treatment Naïve HIV/ HBV Coinfected Individuals From Southern India. Curr HIV Res. 2021;19(4):332-341. doi: 10.2174/1570162X19666210506160642. PMID: 33970847.

Ramalingam VV, Fletcher GJ, Kasirajan A, Demosthenes JP, Rupali P, Varghese GM, Pulimood SA, Rebekah G, Kannangai R. Can in-house HIV-2 viral load assay be a reliable alternative to commercial assays for clinical and therapeutic monitoring? Curr HIV Res. 2022 Jun 9. doi: 10.2174/1570162X20666220609155237. Epub ahead of print. PMID: 35692165.

Thomas RJ, Fletcher GJ, Kirupakaran H, Chacko MP, Thenmozhi S, Eapen CE, Chandy G, Abraham P. Prevalence of non-responsiveness to an indigenous recombinant hepatitis B vaccine: a study among South Indian health care workers in a tertiary hospital. Indian J Med Microbiol. 2015 Feb;33 Suppl:32-6. doi: 10.4103/0255-0857.150877. PMID: 25657153.

Fletcher GJ, Gnanamony M, David J, Ismail AM, Subramani T, Abraham P. Do we need an 'in-house' neutralization assay for confirmation of hepatitis B surface antigen? Answers from a tertiary care hospital in India. J Gastroenterol Hepatol. 2010 May;25(5):942-5. doi: 10.1111/j.1440-1746.2009.06088.x. Epub 2009 Nov 19. PMID: 19929924.

Jacob JJ, John Fletcher G, Monisha Priya T, Veeraraghavan B, Mutreja A. Relevance of immune response and vaccination strategies of SARS-CoV-2 in the phase of viral red queen dynamics. Indian J Med Microbiol. 2021 Oct-Dec;39(4):417-422. doi: 10.1016/j.ijmmb.2021.08.001. Epub 2021 Aug 26. PMID: 34454775; PMCID: PMC8387243.

Ranjan P, Fletcher GJ, Radhakrishnan M, Sivakumar J, Premkumar PS, Goel A, Zachariah UG, Abraham P. Association of interleukin-28B rs12979860 and rs8099917 polymorphisms with sustained viral response in hepatitis C virus genotype 1 and 3 infected patients from the Indian subcontinent. Indian J Med Microbiol. 2016 Jul-Sep;34(3):335-41. doi: 10.4103/0255-0857.188329. PMID: 27514956.

Alexander AM, Prasad JH, Abraham P, Fletcher J, Muliyil J, Balraj V. Evaluation of a programme for prevention of vertical transmission of hepatitis B in a rural block in southern India. Indian J Med Res. 2013 Feb;137(2):356-62. PMID: 23563380; PMCID: PMC3657860.

Jacob JJ, John Fletcher G, Monisha Priya T, Veeraraghavan B, Mutreja A. Relevance of immune response and vaccination strategies of SARS-CoV-2 in the phase of viral red queen dynamics. Indian J Med Microbiol. 2021 Oct-Dec;39(4):417-422. doi: 10.1016/j.ijmmb.2021.08.001. Epub 2021 Aug 26. PMID: 34454775; PMCID: PMC8387243.

Moorthy M, Fletcher J. SARS-CoV-2 Laboratory Testing in India's Pandemic Response: A Public Health Perspective. Indian J Public Health. 2020 Jun;64(Supplement):S128-S131. doi: 10.4103/ijph.IJPH_491_20. PMID: 32496242.

Das S, Doss C GP, Fletcher J, Kannangai R, Abraham P, Ramanathan G. The impact of human papilloma virus on human reproductive health and the effect on male infertility: An updated review. J Med Virol. 2023 Apr;95(4):e28697. doi: 10.1002/jmv.28697. PMID: 36951428.

Ponnuvel S, Prakash A, Steve RJ, Doss GP, Goel A, Zachariah UG, Eapen CE, Rebekah G, Kannangai R, Fletcher GJ, Abraham P. Longitudinal assessment of HCV core antigen kinetics to monitor therapeutic response in the age of DAAs. PLoS One. 2023 Feb 17;18(2):e0282013. doi: 10.1371/journal.pone.0282013. PMID: 36800372; PMCID: PMC9937470.

Daniel HD, Fletcher JG, Chandy GM, Abraham P. Quantitation of hepatitis B virus DNA in plasma using a sensitive cost-effective "in-house" real-time PCR assay. Indian J Med Microbiol. 2009 Apr-Jun;27(2):111-5. doi: 10.4103/0255-0857.45362. PMID: 19384032.

Ramalingam VV, Subramanian S, Fletcher GJ, Rupali P, Varghese G, Pulimood S, Jeyaseelan L, Nandagopal B, Sridharan G, Kannangai R. Interaction of human immunodeficiency virus-1 and human immunodeficiency virus-2 capsid amino acid variants with human tripartite motif 5α protein SPRY domain and its association with pathogenesis. I ndian J Med Microbiol. 2019 Oct-Dec;37(4):574-583. doi: 10.4103/ijmm.IJMM_20_109. PMID: 32436883.

Steve RJ, Prakash A, Ponnuvel S, Dickson CJ, Nandan K, Singh B, Sam GA, Goel A, Zachariah UG, Eapen CE, Kannangai R, Abraham P, Fletcher GJ. Versatile performance edges of HBsAg Next assay in diagnosis and therapeutic monitoring of HBV infection. J Clin Virol. 2023 Jan 11;160:105378. doi: 10.1016/j.jcv.2023.105378. Epub ahead of print. PMID: 36641983.

Calvin DJD, Steve RJ, Kannangai R, Abraham P, Udhaya Kumar S, Balasundaram A, George Priya Doss C, Thomas V, Thomas A, Danda D, Fletcher JG. HPV and molecular mimicry in systemic lupus erythematosus and an impact of compiling B-cell epitopes and MHC-class II binding profiles with in silico evidence. J Biomol Struct Dyn. 2023 Feb 6:1-9. doi: 10.1080/07391102.2023.2175261. Epub ahead of print. PMID: 36744526.

Prakash A, Ponnuvel S, Devadasan JDC, Nithyanandhan K, Baskaran A, Steve RJ, Kalpana T, Singh B, Goel A, Zachariah UG, Eapen CE, Kannangai R, Abraham P, Fletcher GJ. ARCHITECT HBsAg Next assay is positioned better to resolve and refine challenging weak reactive clinical samples. J Clin Virol. 2023 Sep;166:105524. doi: 10.1016/j.jcv.2023.105524. Epub 2023 Jun 26. PMID: 37392725.

Ramesan CK, Calvin JD, Thomas A, Fletcher J, Kannangai R, Abraham P, Peedicayil A. Diagnostic study of human papillomavirus DNA detection in cervical and vaginal samples using the filter paper card. Int J Gynaecol Obstet. 2023 Nov;163(2):660-666. doi: 10.1002/ijgo.14906. Epub 2023 Jun 2. PMID: 37269047.

Demosthenes JP, Ghale BC, Alex D, Ramalingam VV, Fletcher GJ, Abraham P, Kannangai R. Challenges and Pragmatic Solutions for Assessing the Reliability of HIV-1 Viral Load Monitoring in Resource-Constrained Settings. Intervirology. 2024;67(1):1-5. doi: 10.1159/000535064. Epub 2023 Nov 26. PMID: 38008075; PMCID: PMC10765359.

Loganathan T, Fletcher J, Abraham P, Kannangai R, Chakraborty C, El Allali A, Alsamman AM, Zayed H, C GPD. Expression analysis and mapping of Viral-Host Protein interactions of Poxviridae suggests a lead candidate molecule targeting Mpox. BMC Infect Dis. 2024 May 10;24(1):483. doi: 10.1186/s12879-024-09332-x. PMID: 38730352; PMCID: PMC11088078.

Calvin Devadasan JD, Nithyanandhan K, Fletcher GJ, Kannangai R, Abraham P. HPV vaccines - A game changer for preventing HPV-related cancers. Indian J Med Microbiol. 2025 May-Jun;55:100847. doi: 10.1016/j.ijmmb.2025.100847. Epub 2025 Apr 10. PMID: 40221095.

Jehangir S, Navaneethan PR, Karuppasami R, Beck MM, Ross BJ, Kumar M, Santhanam S, Kisku S, Fletcher J. Large population-based assessment of SARS-CoV-2 teratogenicity by profiling congenital anomalies during COVID-19 pandemic. J Turk Ger Gynecol Assoc. 2026 Jun 2;27(2):76-83. doi: 10.4274/jtgga.galenos.2026.2025-11-16. PMID: 42227269; PMCID: PMC13231028.

Loganathan T, Vasudevan K, Fletcher J, Abraham P, Kannangai R, Doss C GP. Mutational dynamics and phylogenetic insights into monkeypox virus clade I evolution. Comput Biol Chem. 2025 Dec;119:108536. doi: 10.1016/j.compbiolchem.2025.108536. Epub 2025 May 31. PMID: 40505262.

Ponnuvel S, Ali H, Prakash A, John Steve R, Singh B, Cherian AG, Goel A, Zachariah UG, Eapen Eapen C, Buenning C, Daghfal DJ, Kannangai R, Abraham P, John Fletcher G. Superior Performance of Newly Developed Alinity Anti-HCV Next Assay in the Diagnosis of HCV Infection. J Med Virol. 2025 Mar;97(3):e70307. doi: 10.1002/jmv.70307. PMID: 40099813.

Barik G, Fletcher GJ, Alex D, Demosthenes JP, Abraham P, Kannangai R. HIV vaccine - Is there a ray of hope in the rugged journey? Indian J Med Microbiol. 2025 Jul-Aug;56:100885. doi: 10.1016/j.ijmmb.2025.100885. Epub 2025 Jun 3. PMID: 40472898.

Calvin Devadasan JD, Nithyanandhan K, Fletcher GJ, Kannangai R, Abraham P. HPV vaccines - A game changer for preventing HPV-related cancers. Indian J Med Microbiol. 2025 May-Jun;55:100847. doi: 10.1016/j.ijmmb.2025.100847. Epub 2025 Apr 10. PMID: 40221095.

Mathew S, Alex D, Demosthenes JP, Rose W, Chacko A, Kompithra RZ, Ramalingam VV, Prakash JAJ, Mathai J, Fletcher GJ, Abraham P, Verghese VP, Kannangai R. Heterogeneity and Hierarchy of Immune Response to Primary Immunization in HIV-Infected Children on HAART and the Impact of an Additional Dose of Vaccine. Indian J Pediatr. 2025 Feb;92(2):181-184. doi: 10.1007/s12098-024-05148-4. Epub 2024 May 27. PMID: 38801497.

Alex D, Steve RJ, Ramalingam VV, Demosthenes JP, Vijayalakshmi G, Ghale BC, Rupali P, Varghese GM, Daniel D, Rebekah G, Fletcher GJ, Abraham P, Kannangai R. Prevalence and potential impact of human pegivirus-1 on HIV-1 disease progression among Indian PLHIV. J Infect Dev Ctries. 2024 Jul 29;18(7):1108-1117. doi: 10.3855/jidc.19397. PMID: 39078797.

Loganathan T, Fletcher J, Abraham P, Kannangai R, Chakraborty C, El Allali A, Alsamman AM, Zayed H, C GPD. Expression analysis and mapping of Viral-Host Protein interactions of Poxviridae suggests a lead candidate molecule targeting Mpox. BMC Infect Dis. 2024 May 10;24(1):483. doi: 10.1186/s12879-024-09332-x. PMID: 38730352; PMCID: PMC11088078.

Fletcher GJ, Gnanamony M, Samuel P, Ismail AM, Kannangai R, Daniel D, Eapen CE, Abraham P. Association of mannose-binding lectin polymorphisms and HBV outcome in a South Indian population. Int J Immunogenet. 2010 Jun;37(3):177-84. doi: 10.1111/j.1744-313X.2010.00908.x. Epub 2010 Feb 24. PMID: 20193030.

Fletcher GJ, Samuel P, Christdas J, Gnanamony M, Ismail AM, Anantharam R, Eapen CE, Chacko MP, Daniel D, Kannangai R, Abraham P. Association of HLA and TNF polymorphisms with the outcome of HBV infection in the South Indian population. Genes Immun. 2011 Oct;12(7):552-8. doi: 10.1038/gene.2011.32. Epub 2011 May 19. PMID: 21593777.

Ismail AM, Sivakumar J, Anantharam R, Dayalan S, Samuel P, Fletcher GJ, Gnanamony M, Abraham P. Performance characteristics and comparison of Abbott and artus real-time systems for hepatitis B virus DNA quantification. J Clin Microbiol. 2011 Sep;49(9):3215-21. doi: 10.1128/JCM.00915-11. Epub 2011 Jul 27. PMID: 21795507; PMCID: PMC3165604.

Ismail AM, Devakumar S, Anantharam R, Fletcher GJ, Subramani T, John GT, Daniel D, Abraham P. Low frequency of occult hepatitis B infection in anti-HBc seropositive blood donors: experience from a tertiary care centre in South India. Blood Transfus. 2012 Apr;10(2):230-2. doi: 10.2450/2011.0046-11. Epub 2011 Nov 15. PMID: 22153686; PMCID: PMC3320787.

Ramachandran J, Ismail AM, Chawla G, Fletcher GJ, Goel A, Eapen CE, Abraham P. Serum HBsAg quantification in treatment-naïve Indian patients with chronic hepatitis B. Indian J Gastroenterol. 2014 Mar;33(2):131-5. doi: 10.1007/s12664-013-0395-1. Epub 2013 Sep 20. PMID: 24052375.

Fletcher GJ, Anantharam R, Radhakrishnan K, Karunakaran A, Abraham P. Cost-Effective In-House Neutralization Assay for the Confirmation of HBeAg. J Clin Lab Anal. 2016 Nov;30(6):1146-1149. doi: 10.1002/jcla.21995. Epub 2016 May 21. PMID: 27207380; PMCID: PMC6807134.

Fletcher GJ, Anantharam R, Radhakrishnan K, Singh U, Karunakaran A, Jeyaseelan V, Abraham P. Evaluation of reliability and performance of hepatitis B virus-e-antigen assays in tertiary care setting. J Immunoassay Immunochem. 2018;39(6):622-635. doi: 10.1080/15321819.2018.1529680. PMID: 30362912.