Publications and Presentations

2007:

  1. Ramani S, Banerjee I, Gladstone BP, Sarkar R, Selvapandian D, Le Fevre AM, Jaffar S, Iturriza-Gomara M, Gray JJ, Estes MK, Brown DW, Kang G. Geographic information systems and genotyping in identification of rotavirus G12 infections in residents of an urban slum with subsequent detection in hospitalized children: emergence of G12 genotype in South India. J Clin Microbiol. 2007; 45: 432-7. PMID: 17135437
  2. Sarkar R, Prabhakar AT, Manickam S, Selvapandian D, Raghava MV, Kang G, Balraj V. Epidemiological investigation of an outbreak of acute diarrhoeal disease using geographic information systems. Trans R Soc Trop Med Hyg. 2007; 101: 587-93. PMID: 17267000
  3. Banda K, Sarkar R, Gopal S, Govindarajan J, Harijan BB, Jeyakumar MJ, Mitta P, Sadanala ME, Selwyn T, Suresh CR, Thomas VA,  Devadason P, Kumar R, SelvapandianD, Kang G, Balraj V. Water handling, sanitation and defecation practices in rural southern India: a knowledge, attitude and practices study. Trans R Soc Trop Med Hyg. 2007; 101: 1124-30. PMID: 17765275

2008:

  1. Sowmyanarayanan TV, Mukhopadhya A, Gladstone BP, Sarkar R, Kang G. Investigation of a hepatitis A outbreak in children in an urban slum in Vellore, Tamil Nadu, using geographic information systems. Indian J Med Res. 2008; 128: 32-7. PMID: 18820356
  2. Ajjampur SS, Rajendran P, Ramani S, Banerjee I, Monica B, Sankaran P, Rosario V, Arumugam R, Sarkar R, Ward H, Kang G. Closing the diarrhoea diagnostic gap in Indian children by the application of molecular techniques. J Med Microbiol. 2008; 57 (Pt 11): 1364-8. PMID: 18927413

2009:

  1. Ajjampur SS, Sankaran P, Kannan A, Sathyakumar K, Sarkar R, Gladstone BP, Kang G. Giardia duodenalis assemblages associated with diarrhea in children in South India identified by PCR-RFLP. Am J Trop Med Hyg. 2009; 80: 16-9. PMID: 19141832
  2. Gopal S, Sarkar R, Banda K, Govindarajan J, Harijan BB, Jeyakumar MB, Mitta P,Sadanala ME, Selwyn T, Suresh CR, Thomas VA, Devadason P, Kumar R, Selvapandian D, Kang G, Balraj V. Study of water supply and sanitation practices in India using geographic information systems: some design and other considerations in a village setting. Indian J Med Res. 2009; 129: 233-41. PMID: 19491414
  3. Sarkar R, Grandin EW, Gladstone BP, Muliyil JP, Kang G. Comprehension and recall of informed consent among participating families in a birth cohort study on diarrhoeal disease. Public Health Ethics 2009; 2: 37-44
  4. Sowmyanarayanan TV, Natarajan SK, Ramachandran A, Sarkar R, Moses PD, Simon A, Agarwal I, Christopher S, Kang G. Nitric oxide production in acute gastroenteritis in Indian children. Trans R Soc Trop Med Hyg. 2009; 103: 849-51 PMID: 19552932
  5. Tate JE, Chitambar S, Esposito DH, Sarkar R, Gladstone B, Ramani S, Raghava MV, Sowmyanarayanan TV, Gandhe S, Arora R, Parashar UD, Kang G. Disease and economic burden of rotavirus diarrhoea in India. Vaccine. 2009; 27 Suppl 5: F18-24. PMID: 19931713

2010:

  1. Ajjampur SS, Liakath FB, Kannan A, Rajendran P, Sarkar R, Moses PD, Simon A, Agarwal I, Mathew A, O'Connor R, Ward H, Kang G. Multisite study of cryptosporidiosis in children with diarrhea in India. J Clin Microbiol. 2010; 48: 2075-81. PMID: 20392919
  2. Sarkar R, Sowmyanarayanan TV, Samuel P, Singh AS, Bose A, Muliyil J, Kang G. Comparison of group counseling with individual counseling in the comprehension of informed consent: a randomized controlled trial. BMC Med Ethics. 2010; 11: 8. PMID: 20470423
  3. Menon VK, George S, Ramani S, Illiayaraja J, Sarkar R, Jana AK, Kuruvilla KA, Kang G. Genogroup IIb norovirus infections and association with enteric symptoms in a neonatal nursery in southern India. J Clin Microbiol. 2010; 48: 3212-5. PMID: 20631107
  4. Ramani S, Sankaran P, Arumugam R, Sarkar R, Banerjee I, Mohanty I, Jana AK, Kuruvilla KA, Kang G. Comparison of viral load and duration of virus shedding in symptomatic and asymptomatic neonatal rotavirus infections. J Med Virol. 2010; 82: 1803-7. PMID: 20827780
  5. Rajendran P, Ajjampur SS, Chidambaram D, Chandrabose G, Thangaraj B, Sarkar R, Samuel P, Rajan DP, Kang G. Pathotypes of diarrheagenic Escherichia coli in children attending a tertiary care hospital in South India. Diagn Microbiol Infect Dis. 2010; 68: 117-22. PMID: 20846583
  6. Vivek R, Nihal L, Illiayaraja J, Reddy PK, Sarkar R, Eapen CE, Kang G. Investigation of an epidemic of Hepatitis E in Nellore in south India. Trop Med Int Health. 2010; 15: 1333-9. PMID: 20955497
  7. Singh AS, Kang G, Ramachandran A, Sarkar R, Peter P, Bose A. Locally made ready to use therapeutic food for treatment of malnutrition a randomized controlled trial. Indian Pediatr. 2010; 47: 679-86. PMID: 20972285
  8. Ajjampur SSR, Sarkar R, Sankaran P, Kannan A, Menon VK, Muliyil J, Ward H, Kang G. Symptomatic and asymptomatic Cryptosporidium infections in children in a semi-urban slum community in south India. Am J Trop Med &Hyg. 2010; 83: 1110-5. PMID:21036847

2011:

  1. Ajjampur SS, Sarkar R, Allison G, Banda K, Kane A, Muliyil J, Naumova E, Ward H, Kang G. Serum IgG response to Cryptosporidium immunodominant antigen gp15 and polymorphic antigen gp40 in children with cryptosporidiosis in South India. Clin Vaccine Immunol. 2011; 18: 633-9. PMID: 21288997
  2. Ajjampur SS, Koshy B, Venkataramani M, Sarkar R, Joseph AA, Jacob KS, Ward H, Kang G. Effect of cryptosporidial and giardial diarrhoea on social maturity, intelligence and physical growth in children in a semi-urban slum in south India. Ann Trop Paediatr. 2011; 31: 205-12. PMID: 21781414
  3. Gladstone BP, Ramani S, Mukhopadhya I, Muliyil J, Sarkar R, Rehman AM, Jaffar S, Gomara MI, Gray JJ, Brown DW, Desselberger U, Crawford SE, John J, Babji S, Estes MK, Kang G. Protective effect of natural rotavirus infection in an Indian birth cohort. N Engl J Med. 2011; 365: 337-46. PMID: 21793745

2012:

  1. Sarkar R, Ajjampur SS, Ward HD, Kang G, Naumova EN. Analysis of human immune responses in quasi-experimental settings: tutorial in biostatistics. BMC Med Res Methodol. 2012; 12: 1. PMID: 22214542
  2. Sarkar R, Ajjampur SS, Muliyil J, Ward H, Naumova EN, Kang G. Serum IgG responses and seroconversion patterns to Cryptosporidium gp15 among children in a birth cohort in south India. Clin Vaccine Immunol. 2012; 19: 849-54. PMID: 22518011
  3. Sowmyanarayanan TV, Ramani S, Sarkar R, Arumugam R, Warier JP, Moses PD, Simon A, Agarwal I, Bose A, Arora R, Kang G. Severity of rotavirus gastroenteritis in Indian children requiring hospitalization. Vaccine. 2012; 30 Suppl 1: A167-72. PMID: 22520127
  4. Jagai JS, Sarkar R, Castronovo D, Kattula D, McEntee J, Ward H, Kang G, Naumova EN. Seasonality of rotavirus in South Asia: a meta-analysis approach assessing associations with temperature, precipitation, and vegetation index. PLoS One. 2012; 7: e38168.  PMID: 22693594
  5. Lopman BA, Pitzer VE, Sarkar R, Gladstone B, Patel M, Glasser J, Gambhir M, Atchison C, Grenfell BT, Edmunds WJ, Kang G, Parashar UD. Understanding reduced rotavirus vaccine efficacy in low socio-economic settings. PLoS One. 2012; 7: e41720. PMID: 22879893
  6. Sowmyanarayanan TV, Patel T, Sarkar R, Broor S, Chitambar SD, Krishnan T, Arora R, Kang G. Direct costs of hospitalization for rotavirus gastroenteritis in different health facilities in India. Indian J Med Res. 2012; 136: 68-73. PMID: 22885266
  7. Desai N, Sarkar R, Kang G. Cryptosporidiosis: an under-recognised public health problem. Trop Parasitol 2012; 2: 91-98. PMID: 23767015

2013:

  1. Francis MR, Roy S, Sarkar R, Balraj V, Kang G. Evaluation of a commercially available polyvinylidene fluoride membrane filtration system for water decontamination. Indian J Med Microbiol. 2013; 31: 97-8. PMID: 23508447
  2. Sarkar R, Sivarathinaswamy P, Thangaraj B, Sindhu KN, Ajjampur SS, Muliyil J, Balraj V, Naumova EN, Ward H, Kang G. Burden of childhood diseases and malnutrition in a semi-urban slum in southern India. BMC Public Health. 2013; 13: 87. PMID: 23360429
  3. Menon VK, George S, Aladin F, Nawaz S, Sarkar R, Lopman B, Gray JJ, Gomara MI, Kang G. Comparison of age-stratified seroprevalence of antibodies againstnorovirus GII in India and the United Kingdom. PLoS One. 2013; 8: e56239. PMID: 23437102
  4. Sarkar R, Ajjampur SS, Prabakaran AD, Geetha JC, Sowmyanarayanan TV, Kane A, Duara J, Muliyil J, Balraj V, Naumova EN, Ward H, Kang G. Cryptosporidiosis among children in an endemic semiurban community in southern India: does a protected drinking water source decrease infection? Clin Infect Dis. 2013; 57: 398-406. PMID: 23709650
  5. Mukhopadhya I, Sarkar R, Menon VK, Babji S, Paul A, Rajendran P, Sowmyanarayanan TV, Moses PD, Iturriza-Gomara M, Gray JJ, Kang G. Rotavirus shedding in symptomatic and asymptomatic children using reverse transcription-quantitative PCR. J Med Virol. 2013; 85: 1661-8. PMID: 23775335
  6. Sarkar R, Kang G, Naumova EN. Rotavirus seasonality and age effects in a birth cohort study of southern India. PLoS One. 2013; 8: e71616. PMID: 23977089
  7. Menon VK, Sarkar R, Moses PD, Agarwal I, Simon A, Kang G. Norovirus Genogroup II gastroenteritis in hospitalized children in south India. Am J Trop Med Hyg.  2013; 89: 1019-22. PMID: 24062476
  8. Kaliappan SP, George S, Francis MR, Kattula D, Sarkar R, Minz S, Mohan VR, George K, Roy S, Ajjampur SS, Muliyil J, Kang G. Prevalence and clustering of soil-transmitted helminth infections in a tribal area in southern India. Trop Med Int Health. 2013; 18: 1452-62. PMID: 24237860

2014:

  1. Kattula D, Sarkar R, Rao Ajjampur SS, Minz S, Levecke B, Muliyil J, Kang G.  Prevalence & risk factors for soil transmitted helminth infection among school children in south India. Indian J Med Res. 2014; 139: 76-82. PMID: 24604041
  2. Sindhu KN, Sowmyanarayanan TV, Paul A, Babji S, Ajjampur SS, Priyadarshini S, Sarkar R, Balasubramanian KA, Wanke CA, Ward HD, Kang G. Immune response and intestinal permeability in children with acute gastroenteritis treated with Lactobacillus rhamnosus GG: A randomized, double-blind, placebo-controlled trial.  Clin Infect Dis. 2014; 58: 1107-15. PMID: 24501384
  3. Kattula D, Sarkar R, Sivarathinaswamy P, Velusamy V, Venugopal S, Naumova EN, Muliyil J, Ward H, Kang G. The first 1000 days of life: prenatal and postnatal risk factors for morbidity and growth in a birth cohort in southern India. BMJ Open. 2014. 4: e005404. PMID: 25056979
  4. Sarkar R, Tate JE, Ajjampur SS, Kattula D, John J, Ward HD, Kang G. Burden of diarrhea, hospitalization and mortality due to cryptosporidial infections in Indian children. PLoS Neglected Tropical Diseases. 2014. 8: e3042. PMID: 25058664
  5. John J, Sarkar R, Muliyil J, Bhandari N, Bhan MK, Kang G. Rotavirus gastroenteritis in India, 2011-2013: Revised estimates of disease burden and potential impact of vaccines. Vaccine. 2014. 32 Suppl 1: A5-9. PMID: 25091681
  6. Kompithra RZ, Paul A, Manoharan D, Babji S, Sarkar R, Mathew LG, Kang G. Immunogenicity of a three dose and five dose oral human rotavirus vaccine (RIX4414) schedule in south Indian infants. Vaccine. 2014. 32 Suppl 1: A129-33. PMID: 25091666
  7. Jennifer MS, Kattula D, Sowmyanarayanan TV, Sarkar R, Kang G. Health utilization for childhood gastroenteritis in southern India. Indian J Pediatr. 2014 2014; 81: 1240-1. PMID: 24557605
  8. Sarkar R, Kattula D, Francis MR, Ajjampur SS, Prabakaran AD, Jayavelu N, Muliyil J, Balraj V, Naumova EN, Ward HD, Kang G. Risk factors for cryptosporidiosis among children in a semi urban slum in southern India: a nested case-control study. Am J Trop Med Hyg. 2014; 91: 1128-37. PMID: 25331810

2015:

  1. Mohan VR, Sarkar R, Abraham VJ, Balraj V, Naumova EN. Differential patterns, trends and hotspots of road traffic injuries on different road networks in Vellore district, southern India. Trop Med Int Health. 2015; 20: 293-303. PMID: 25425088
  2. Kattula D, Francis MR, Kulinkina A, Sarkar R, Mohan VR, Babji S, Ward HD, Kang G, Balraj V, Naumova EN. Environmental predictors of diarrhoeal infection for rural and urban communities in south India in children and adults. Epidemiol Infect. 2015; 143: 3036-47. PMID: 25690841
  3. Rogawski ET, Westreich D, Becker-Dreps S, Adair LS, Sandler RS, Sarkar R, Kattula D, Ward HD, Meshnick SR, Kang G. The effect of early life antibiotic exposures on diarrheal rates among young children in vellore, India. Pediatr Infect Dis J. 2015; 34: 583-8. PMID: 25742244
  4. Rogawski ET, Westreich DJ, Becker-Dreps S, Adair LS, Sandler RS, Sarkar R, Kattula D, Ward HD, Meshnick SR, Kang G. Antibiotic treatment of diarrhoea is associated with decreased time to the next diarrhoea episode among young children in Vellore, India. Int J Epidemiol. 2015; 44: 978-87. PMID: 25929259
  5. Collinet-Adler S, Babji S, Francis M, Kattula D, Premkumar PS, Sarkar R, Mohan VR, Ward H, Kang G, Balraj V, Naumova EN. Environmental Factors Associated with High Fly Densities and Diarrhea in Vellore, India. Appl Environ Microbiol. 2015; 81: 6053-8. PMID: 26116684
  6. Francis MR, Nagarajan G, Sarkar R, Mohan VR, Kang G, Balraj V. Perception of drinking water safety and factors influencing acceptance and sustainability of a water quality intervention in rural southern India. BMC Public Health. 2015; 15: 731. PMID: 26223687
  7. Rogawski ET, Westreich DJ, Adair LS, Becker-Dreps S, Sandler RS, Sarkar R, Kattula D, Ward HD, Meshnick S, Kang G. Early life antibiotic exposure is not associated with growth in young children of Vellore, India. J Pediatr. 2015; 167: 1096-102. PMID: 26372535
  8. Kompithra RZ, Sarkar R, Mathew LG, Muliyil J, Kang G. Study of common illnesses before and after vaccination: a risk-interval approach. Indian Pediatr. 2015; 52: 933-8. PMID: 26615339
  9. Lazarus RP, Ajjampur SS, Sarkar R, Geetha JC, Prabakaran AD, Velusamy V, Naumova EN, Ward HD, Kang G. Serum anti-cryptosporidial gp15 antibodies in mothers and children less than 2 years of age in India. Am J Trop Med Hyg. 2015; 93: 931-8. PMID: 26304924

2016:

  1. Rogawski ET, Meshnick SR, Becker-Dreps S, Adair LS, Sandler RS, Sarkar R, Kattula D, Ward HD6 Kang G, Westreich DJ. Reduction in diarrhoeal rates through interventions that prevent unnecessary antibiotic exposure early in life in an observational birth cohort. J Epidemiol Community Health. 2016; 70: 500-5. PMID: 26621194
  2. Kulinkina AV, Mohan VR, Francis MR, Kattula D, Sarkar R, Plummer JD, Ward H Kang G, Balraj V, Naumova EN. Seasonality of water quality and diarrheal disease counts in urban and rural settings in south India. Sci Rep. 2016; 6: 20521. PMID: 26867519
  3. Dinh DM, Ramadass B, Kattula D, Sarkar R, Braunstein P, Tai A, Wanke CA, Hassoun S, Kane AV, Naumova EN, Kang G, Ward HD. Longitudinal analysis of the intestinal microbiota in persistently stunted young children in south India. PLoS One. 2016; 11: e0155405. PMID: 27228122
  4. Menon VK, George S, Sarkar R, Giri S, Samuel P, Vivek R, Saravanabavan A, Liakath FB, Ramani S, Iturriza-Gomara M, Gray JJ, Brown DW, Estes MK, Kang G. Norovirus gastroenteritis in a birth cohort in southern India. PLoS One. 2016; 11: e0157007. PMID: 27284939
  5. George S, Levecke B, Kattula D, Velusamy V, Roy S, Geldhof P, Sarkar R, Kang G. Molecular identification of hookworm isolates in humans, dogs and soil in a tribal area in Tamil Nadu, India. PLoS Negl Trop Dis. 2016; 10: e0004891. PMID: 27486798
  6. Kattula D, Venugopal S, Velusamy V, Sarkar R, Jiang V, S MG, Henry A, Deosaran JD, Muliyil J, Kang G. Measuring poverty in southern India: a comparison of socio-economic scales evaluated against childhood stunting. PLoS One. 2016; 11: e0160706. PMID: 27490200
  7. Sarkar R, Gladstone BP, Warier JP, Sharma SL, Raman U, Muliyil J, Kang G. Rotavirus and other diarrheal disease in a birth cohort from southern Indian community. Indian Pediatr. 2016; 53: 583-8. PMID: 27508534
  8. Kang G, Thuppal SV, Srinivasan R, Sarkar R, Subashini B, Venugopal S, Sindhu K, Anbu D, Parez N, Svensson L, Bose A. Racecadotril in the management of rotavirus and non-rotavirus diarrhea in under-five children: two randomized, double-blind, placebo-controlled trials. Indian Pediatr. 2016; 53: 595-600. PMID: 27508536
  9. Paul A, Babji S, Sarkar R, Lazarus RP, Kang G. Rotavirus specific salivary and fecal IgA in Indian children and adults. Indian Pediatr. 2016; 53: 601-6. PMID: 27508537
  10. Varghese GM, Raj D, Francis MR, Sarkar R, Trowbridge P, Muliyil J. Epidemiology and risk factors of scrub typhus in south India. Indian J Med Res. 2016; 144: 76-81. PMID: 27834329.
  11. Francis MR, Sarkar R, Roy S, Jaffar S, Mohan VR, Kang G, Balraj V. Effectiveness of membrane filtration to improve drinking water: a quasi-experimental study from rural southern India. Am J Trop Med Hyg. 2016; 95: 1192-1200. PMID: 27601525.

2017:

  1. Alarcon Falconi TM, Kulinkina AV, Mohan VR, Francis MR, Kattula D, Sarkar R, Ward H, Kang G, Balraj V, Naumova EN. Quantifying tap-to-household water quality deterioration in urban communities in Vellore, India: the impact of spatial assumptions. Int J Hyg Environ Health. 2017; 220: 29-36. PMID: 27773615.
  2. Kattula D, Jeyavelu N, Prabhakaran AD, Premkumar PS, Velusamy V, Venugopal S, Geetha JC, Lazarus RP, Das P, Nithyanandhan K, Gunasekaran C, Muliyil J, Sarkar R, Wanke C, Ajjampur SS, Babji S, Naumova EN, Ward HD, Kang G. Natural history of cryptosporidiosis in a birth cohort in southern India. Clin Infect Dis. 2017; 64: 347-354. PMID: 28013266.
  3. Sarkar R, Rose A, Mohan VR, Ajjampur SS, Veluswamy V, Srinivasan R, Muliyil J, Rajshekhar V, George K, Balraj V, Grassly NC, Anderson RM, Brooker SJ, Kang G. Study design and baseline results of an open-label cluster randomized community-intervention trial to assess the effectiveness of a modified mass deworming program in reducing hookworm infection in a tribal population in southern India. Contemp Clin Trials Commun. 2017. 5: 49-55.
  4. Coffeng LE, Truscott JE, Farrell SH, Turner HC, Sarkar R, Kang G, de Vlas SJ, Anderson RM. Comparison and validation of two mathematical models for the impact of mass drug administration on Ascaris lumbricoides and hookworm infection. Epidemics. 2017; 18: 38-47. PMID: 28279454.