ICMR - NIRBI


ICMR - National Institute for Research
in Bacterial Infections

आईसीएमआर - राष्ट्रीय जीवाणु संक्रमण अनुसंधान संस्थान

Department of Health Research, Ministry of Health and Family Welfare, Government of India
स्वास्थ्य अनुसंधान विभाग, स्वास्थ्य और परिवार कल्याण मंत्रालय, भारत सरकार
WHO Collaborating Centre For Research and Training On Diarrhoeal Diseases

BETI BACHAO BETI PADHAO
G20

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NICED : Scientists

  1. NICED
  2. Scientists
Dr. Ranjan Kumar Nandy

Dr. Ranjan Kumar Nandy

Dr. Ranjan K Nandy is working as Scientist "F" in the Division of Bacteriology, National Institute of Cholera and Enteric Diseases (NICED), Kolkata since September 2012. He began his career as Scientist B of ICMR Virus Unit, Kolkata with his inclusion in the ICMR family in December 2000. He received his Master degree in Biochemistry and subsequently Ph.D. (Biochemistry) from the University of Calcutta in 1997. He got his specialization on microbiology and molecular biology with emphasis to characterize pathogenic Vibrio cholerae.

Dr. Nandy did his postdoctoral research at Bose Institute, Kolkata to study role of V. cholerae immunogenic outer membrane protein OmpW in intestinal colonization process and to develop ompW targeted PCR based assay for V. cholerae identification. As a postdoctoral researcher at Washington University at Saint Louis, USA he worked in the area of advance genomics.

Dr. Nandy is continuing his research for better understanding of pathophysiological, immunological, and molecular biological aspects of V. cholerae in relation to its molecular mechanism of pathogenesis and nature of protective antigens. In addition, he is also involved in the studies on molecular epidemiology of pathogenic V. cholerae. He has published more than 60 research papers dealing with characterization of virulence factors, protective antigens and molecular epidemiology of V. cholerae. His membership includes Society of Biological Chemists and The Indian Science Congress Association.

General Information
Name : Dr. Ranjan Kumar Nandy
Designation : Scientist G
Date of joining ICMR : December 27, 2000
Date of joining present post : September 1, 2017
Discipline : Microbiology
Email : nandyrk.niced@gov.in and nandy_rk@hotmail.com 
Academic Qualification : M.Sc., Ph.D.
Graduation Chemistry (Hons.)
Post-Graduation Biochemistry
Doctoral Dpt. of Biochemistry (area Microbiology)

Profile

Research Experience

B.Sc. in Chemistry from Presidency College (University of Calcutta) in 1987, M.Sc. in Biochemistry from University of Calcutta in 1989 and Ph.D. from the same University in 1987. Specialization in the field of Microbiology and Molecular Biology with special emphasis on the characterization of protective antigens, virulence factors and their regulation in pathogenic Vibrio cholerae. Postdoctoral researcher in Bose Institute, Kolkata to study role of V. cholerae immunogenic outer membrane protein OmpW in intestinal colonization process and to develop ompW targeted PCR based assay for V. cholerae identification. Postdoctoral researcher at Washington University at Saint Louis, USA to work in the field of genomics..

Research Interest

Our laboratory is currently involved to understand the pathophysiological, immunobiological and molecular biological aspects of Vibrio cholerae in relation to its molecular mechanism of pathogenesis and nature of protective antigens..

Memberships

  • Society of Biological Chemists, India- Life Member
  • The Indian Science Congress Association- Life Member
  • Indian Public Health Association- Life Member
     

Fellow of Professional Societies

  • Fellow of the West Bengal Academy of Science and Technology (WAST) 2020

Projects

Extramural

  1. Title: Estimation of Vibrio cholerae O1 infection in India: a step towards identification of cholera hotspots. Duration: 2021; Role: Co-I; Sponsor: Indian Council of Medical Research
  2. Title: A Multicenter, Phase III, Double-Blind, Randomized, Placebo-Controlled Study to Evaluate the Efficacy of Recombinant BCG VPM1002 in Reducing Infection Incidence and Disease Severity of SARS-COV-2/ COVID-19 Among High-Risk Subjects; Duration: 2020-2021. Role: Co-I; Sponsor: Serum Institute of India Pvt. Ltd.
  3. Title: Immunogenicity and Safety of Rotavac and Rotasiil Administered in an Interchangeable Dosing Schedule among Healthy Indian Infants: A Multicentric, Phase IV, Open-Labelled, Randomized, Controlled Trial (RVICS). Duration: 2018-2020; Role: Co-I; Sponsor: Ministry of Health and Family Welfare, Govt. of India (Coordinated by Indian Council of Medical Research)
  4. Title: Phase III, Multicenter, Randomized, Double-blind, Placebo-controlled Study to Evaluate the Efficacy and Safety of Live Attenuated Bovine-Human Rotavirus Reassortant Pentavalent Vaccine (BRV-PV) Against Severe Rotavirus Gastroenteritis in Healthy Indian Infants. Duration: 2014-2017; Role: Co-I; Sponsor: PATH Vaccine Solution, USA
  5. Title: An approach to identify the environmental drivers modulating rotavirus seasonally. Duration: 2017-2020; Role: Co-PI; Sponsor: Indian Council of Medical Research
  6. Title: Burden of Antibiotic Resistance in Neonates from Developing Societies (BARNARDS). Duration: 2017-2018; Role: Co-PI; Sponsor: Cardiff University, UK
  7. Title: Exploration of the biologic basis for underperformance of oral Polio and Rotavirus vaccine in India. Duration: 2012-2015; Role: PI; Sponsor: International Vaccine Institute (IVI), Seoul, Korea
  8. Title: Gastrointestinal Tract Pathogens Repository at National Institute of Cholera and Enteric Diseases, Kolkata. Duration: 2011-2016; Role; PI since 2014; Sponsor; Indian Council of Medical Research (ICMR), Government of India
  9. Title: Determine the immune response to novel conserved Shigella protein antigens in patients with recent onset of shigellosis. Duration: 2010-2011; Role: PI; Sponsor: International Vaccine Institute (IVI), Seoul, Korea
  10. Title: Novel strategies to combat cholera; Duration: 2009-2012; Role: PI; Sponsor: Indian Council of Medical Research (ICMR), Government of India
  11. Title: A multicenter, double-Blind, randomized study to compare the safety and efficacy of Prulifloxacin versus placebo in the treatment of acute gastroenteritis in adult travelers. Duration: 2009-2010; Role: PI; Sponsor: University of Texas, Houston, USA
  12. Title: Development of new RT-PCR method for direct identification of enteric pathogens from stool samples. Duration: 2008-2011; Role: PI; Sponsor: Okayama University, Okayama, Japan
  13. Title: Comparative analysis of luxO, the quorum sensing master regulator, among O1, O139 and non-O1, non-O139 Vibrio cholerae strains. Duration: 2007-2010; Role: PI; Sponsor: Department of Biotechnology (DBT), Government of India
  14. Title: Detection, distribution and functional analysis of CTX prophages in toxigenic non-O1, non-O139 Vibrio cholerae strains isolated over the span of a decade: an evolutionary study of their variants. Duration: 2005-2008; Role: PI; Sponsor: Council of Scientific and Industrial Research, Government of India
  15. Title: A randomized double-blind, multi-center, comparative study of Rifaximin vs. placebo vs. Ciprofloxacin in the treatment of traveler's diarrhea due to enteropathogenic organisms. Duration: 2003-2004; Role: PI; Sponsor: University of Texas, Houston, USA
  16. Title: An approach to identify the environmental drivers modulating rotavirus seasonality. Duration: 2017-2020; Role: Co-PI; Sponsor; Indian Council of Medical Research (ICMR), Government of India
  17. Title: A randomized controlled trial to evaluate the immunogenicity of two doses of the modified killed whole cell oral cholera vaccine (WC-OCV) under two alternative vaccination schedules. Duration: 2013; Role: Co-PI; Sponsor: International Vaccine Institute (IVI), Seoul, Korea
  18. Title: An open labeled controlled trial to evaluate the immune response of a boosting regimen with shancholTM a killed whole-cell oral cholera vaccine (WC-OCV), in previously immunized children and adults in eastern Kolkata, India. Duration: 2013; Role: Co-PI; Sponsor: International Vaccine Institute (IVI), Seoul, Korea

Intramural

  1. Title: Culture independent detection of Vibrio cholerae O1 directly from diarrheal stool specimens by loop-mediated isothermal amplification (LAMP) assay; Duration: 2018-21; Role: PI
  2. Title: Understanding basis for arabinose mediated virulence attenuation of pathogenic Vibrio cholerae; Duration: 2019-2022; Role: PI
  3. Title: Metabolic flux and virulence in Vibrio cholerae: two beads on the twine; Duration: 2015-2018; Role: PI
  4. Title: Entner Doudoroff (ED) pathway and regulation of virulence determinants in Vibrio cholerae. Duration: 2012-2015; Role: PI
  5. Title: Carbohydrate utilization pathways of Vibrio cholerae and their relevance in regulation of expression of genes including virulence determinants. Duration: 2008-2012; Role: PI
  6. Title: Vibriocidal assay on rough Vibrio cholerae strains with acute and convalescent sera collected from cholera patients and implication of gene(s) for the rough phenotype. Duration: 2005-2008. Role: PI
  7. Title: Characterization of rough strains of Vibrio cholerae isolated from diarrheal patients. Duration: 2003- 2005; Role: PI
  8. Title: Molecular analysis of Vibrio cholerae bacteriophages: cloning and sequencing of phage DNA. Duration: 2008-2011. Role: Co-PI
  9. Title: Molecular epidemiology of Vibrio cholerae.Duration: 2005-2011; Role; Co-PI

Students

Present student

  • Postdoc (SERB)- Dr. Prosenjit Pyne
  • SRF- Taniya Golder

Ph.D. Awarded

  • Dr. Sambit Roy; awarded in 2017 from University of Calcutta
  • Dr. Anuradha Sinha; awarded in 2014 from Jadavpur University
  • Dr. SouravSengupta (jt. guidance); awarded in 2013 from Jadavpur University
  • Dr. Tapas Patra; awarded in 2012 from Jadavpur University
  • Dr. Mayukh Das (jt. guidance); awarded in 2010 from Jadavpur University
  • Dr. Kausik Ghosh; awarded in 2010 from Jadavpur University
  • Dr. Souvik Chatterjee; awarded in 2009 from Jadavpur University

Travel to foreign countries to attend conference/ meetings (for the last 5 years):

  1. Poster presentation in ''Cholera Panel Meeting'' under 53rd US-Japan Joint Panel Conference on Cholera and Other Bacterial Enteric Infections at Hanoi, Vietnam during February 26-April 01, 2019.
  2. Poster presentation in ''Cholera Panel Meeting'' under 52nd US-Japan Joint Panel Conference on Cholera and Other Bacterial Enteric Infections at Hat Yai, Thailand during February 19-24, 2018.
  3. Presentation of NICED-Cardiff University collaborative project BARNARDS research data to Bill and Melinda Gates Foundation expert at Seattle, USA during October 9-10, 2017.
  4. Attended "Multi-Country Workshop" under NICED-Cardiff University, UK collaborative project "Burden of Antibiotic Resistance in Neonates from Developing Societies" (BARNARDS) at Kigali, Rwanda during May 7-12, 2017.
  5. Poster presentation in "Cholera Panel Meeting" under US-Japan CMSP; during January 11-15, 2016
  6. Guest faculty and invited speaker at 15th International Advanced Course on Vaccinology in Asia-Pacific Regions, organized by IVI, Seoul, Korea during May 11-15, 2015.
  7. Attended NICED-IVI collaborative PROVIDE project meeting at Seattle, USA during July 5-7, 2014.

Publications

2020

  1. Ramamurthy T, Nandy RK, Mukhopadhyay AK, Dutta S, Mutreja A, Okamoto K, Miyoshi SI, Nair GB, Ghosh A. Virulence regulation and innate host response in the pathogenicity of Vibrio cholerae. Front Cell Infect Microbiol. 2020 Sep 30;10:57209610
  2. Golder T, Mukhopadhyay AK, Koley H, Nandy RK. Nonmetabolizable arabinose inhibits Vibrio cholerae growth in M9 medium with gluconate as sole carbon source. Jpn J Infect Dis. Sep 24;73(5):343-348.

2018

  1. Samanta P, Saha RN, Chowdhury G, Naha A, Sarkar S, Dutta S, Nandy RK, Okamoto K, Mukhopadhyay AK. Dissemination of newly emerged polymyxin B sensitive Vibrio cholerae O1 containing Haitian-like genetic traits in different parts of India. J Med Microbiol. 2018 Sep; 67(9):1326-1333. .Pubmed
  2. Sinha A, Kanungo S, Kim DR, Manna B, Song M, Park JY, Haldar B, Sharma P, Mallick AH, Kim SA, Babji S, Sur D, Kang G, Ali M, Petri WA Jr, Wierzba TF, Czerkinsky C, Nandy RK, Dey A. Antibody secreting B cells and plasma antibody response to rotavirus vaccination in infants from Kolkata India. Heliyon. 2018 Feb 1;4(1):e00519. Pubmed

2017

  1. Nayak U, Kanungo S, Zhang D, Ross Colgate E, Carmolli MP, Dey A, Alam M, Manna. B, Nandy RK, Kim DR, Paul DK, Choudhury S, Sahoo S, Harris WS, Wierzba TF, Ahmed T, Kirkpatrick BD, Haque R, Petri WA Jr, Mychaleckyj JC. Influence of maternal and socioeconomic factors on breast milk fatty acid composition in urban,low-income families. Matern Child Nutr. 2017 Oct;13(4). Pubmed
  2. Kanungo S, Kim DR, Haldar B, Snider C, Nalavade U, Kim SA, Park JY, Sinha A,Mallick AH, Manna B, Sur D, Nandy RK, Deshpande JM, Czerkinsky C, Wierzba TF, Petri WA Jr, Ali M, Dey A. Comparison of IPV to tOPV week 39 boost of primary OPV vaccination in Indian infants: an open labelled randomized controlled trial. Heliyon. 2017 Jan 9;3(1):e00223. doi: 10.1016/j.heliyon.2016.e00223. Pubmed

2016

  1. Roy S, Patra T, Golder T, Chatterjee S, Koley H, Nandy RK. Characterization of the gluconate utilization system of Vibrio cholerae with special reference to virulence modulation. Pathog Dis. 2016 Nov;74(8). pii: ftw085. Pubmed
  2. Chowdhury G, Bhadra RK, Bag S, Pazhani GP, Das B, Basu P, Nagamani K, Nandy RK, Mukhopadhyay AK, Ramamurthy T. Rugose atypical Vibrio cholerae O1 El Tor responsible for 2009 cholera outbreak in India. J Med Microbiol. 2016Oct;65(10):1130-1136. Pubmed
  3. Sinha A, Dey A, Saletti G, Samanta P, Chakraborty PS, Bhattacharya MK, GhoshS, Ramamurthy T, Kim JO, Yang JS, Kim DW, Czerkinsky C, Nandy RK. Circulating Gut-Homing (α4β7+) Plasmablast Responses against Shigella Surface Protein Antigens among Hospitalized Patients with Diarrhea. Clin Vaccine Immunol. 2016 Jul 5;23(7):610-7. Pubmed
  4. Bolger G, Roy S, Zapol'skii VA, Kaufmann DE, Schnürch M, Mihovilovic MD, Nandy RK, Tegge W. Targeting aphA: a new high-throughput screening assay identifies compounds that reduce prime virulence factors of Vibrio cholerae. J Med Microbiol. 2016 Jul;65(7):678-87.  Pubmed
  5. Park JY, Kim DR, Haldar B, Mallick AH, Kim SA, Dey A, Nandy RK, Paul DK, Choudhury S, Sahoo S, Wierzba TF, Sur D, Kanungo S, Ali M, Manna B. 2016. Use of the data system for field management of a clinical study conducted in Kolkata, India. BMC Res. Notes 9(1):20. Pubmed
  6. Dey A, Molodecky NA., Verma H, Sharma P, Yang JS., Saletti G, Ahmad M, Bahl SK, Wierzba TF, Nandy RK, Deshpande JM, Sutter RW, Czerkinsky C. 2016. Human circulating antibody-producing B cell as a predictive measure of mucosal immunity to Poliovirus. PLoS One.11(1):e0146010 Pubmed

2015

  1. Kanungo S, Desai SN, Saha J, Nandy RK, Sinha A, Kim DR, Bannerjee B, Manna B, Yang JS, Ali M, Sur D, Wierzba TF. (2015). An open label non-inferiority trial assessing vibriocidal response of a killed bivalent oral cholera vaccine regimen following a five year interval in Kolkata, India. PLoSNegl Trop Dis. 9(5):e0003809. Pubmed
  2. Kanungo S, Desai SN, Nandy RK, Bhattacharya MK, Kim DR, Sinha A, Mahapatra T, Yang JS, Lopez AL, Manna B, Bannerjee B, Ali M, Dhingra MS, Chandra AM, Clemens JD, Sur D, Wierzba TF. (2015). Flexibility of Oral Cholera Vaccine Dosing-A Randomized Controlled Trial Measuring Immune Responses Following Alternative Vaccination Schedules in a Cholera Hyper-Endemic Zone. PLoSNegl Trop Dis. 9(3):e0003574 Pubmed
  3. Kim JO, Rho SM, Kim SH, Kim HJ, Song HJ, Kim EJ, Kim RY, Kim EH, Sinha A, Dey A, Yang JS, Song MK, Nandy R, Czerkinsky C, Kim DW. (2015). Broadly protective Shigella outer membrane protein PSSP-1 against Shigella infection. Clin. Vaccine Immunol. 22:381-8. Pubmed

2014

  1. Kanungo, S., B. Sen, T. Ramamurthy, D. Sur, B. Manna, G. P. Pazhani, G. Chowdhury, P. Jhunjhunwala, R. K. Nandy, H. Koley, M. K. Bhattacharya, S. Gupta, G. Goel, B. Dey, G. B. Nair, A. Ghosh, D. Mahalanabis. 2014. Safety and immunogenicity of a live oral recombinant cholera vaccine VA1.4: a randomized, placebo controlled trial in healthy adults in a cholera endemic area in Kolkata, India. PLoS One. 1;9(7):e99381. Pubmed
  2. Pazhani, G. P., S. K. Bhowmik, S. Ghosh, S. Guin, S. Dutta, K. Rajendran, D. R. Saha, R. K. Nandy, M. K. Bhattacharya, A. K. Mukhopadhyay, T. Ramamurthy.2014.Trends in the epidemiology of pandemic and non-pandemic strains of Vibrio parahaemolyticus isolated from diarrheal patients in Kolkata, India.PLoSNegl. Trop. Dis.1;8(5):e2815 Pubmed
  3. Sergeev, G., S. Roy, M. Jarek, V. Zapolskii, D. E. Kaufmann, R. K. Nandy, W. Tegge. 2014.High-throughput screening and whole genome sequencing identifies an antimicrobially active inhibitor of Vibrio cholerae. BMC Microbiol. 14:49. Pubmed
  4. Ghosh, P., A. Naha, S. Basak, S. Ghosh, T. Ramamurthy, H. Koley, R. K. Nandy, S. Shinoda, H. Watanabe, A. K. Mukhopadhyay. 2014. Haitian variant tcpA in Vibrio cholerae O1 El Tor strains in Kolkata, India.J.Clin.Microbiol. 52:1020-1 Pubmed

2013

  1. Sinha, A., S. SenGupta, S. Guin, S. Dutta, S. Ghosh, P. Mukherjee, A. K. Mukhopadhyay, T. Ramamurthy, Y. Takeda, T. Kurakawa, K. Nomoto, G. B. Nair, R. K. Nandy. 2013. Culture-independent real-time PCR reveals extensive polymicrobial infections in hospitalized diarrhoea cases in Kolkata, India. Clin. Microbiol. Infect. 19: 173-180. Pubmed
  2. Dutta, D., G. Chowdhury, G. P. Pazhani, S. Guin, S. Dutta, S. Ghosh, K. Rajendran, R. K. Nandy, A. K. Mukhopadhyay, M. K. Bhattacharya, U. Mitra, Y. Takeda, G. B. Nair, T. Ramamurthy. 2013. Vibrio cholerae Non-O1, Non-O139 Serogroups and Cholera-like Diarrhea, Kolkata, India. Emerging Infect. Dis. 19: 464- 467. Pubmed
  3. Ramamurthy, D., G. P. Pazhani, A. Sarkar, R. K. Nandy, K. Rajendran, D. Sur, B. Manna, T. Ramamurthy. 2013. Case-Control Study on the Role of Enterotoxigenic Bacteroides fragilis as a Cause of Diarrhea among Children in Kolkata, India. PLoS One. 8(4): e60622. Pubmed
  4. Naha, A., G. Chowdhury, J. Ghosh-Banerjee, M. Senoh, T. Takahashi, B. Ley, K. Thriemer, J. Deen, L. V. Seidlein, S. M. Ali, A. Khatib, T. Ramamurthy, R. K. Nandy, G. B. Nair, Y. Takeda, A. K. Mukhopadhyay. 2013. Molecular characterization of high-level-cholera-toxin-producing El Tor variant Vibrio cholerae strains in the Zanzibar Archipelago of Tanzania. J. Clin. Microbiol. 51: 1040-1045. Pubmed

2012

  1. Sinha, A., S. Sengupta, S. Ghosh, S. Basu, D. Sur, S. Kanungo, A. K. Mukhopadhyay, T. Ramamurthy, K. Nagamani, M. N. Rao, R.K. Nandy. 2012. Evaluation of a rapid dipstick test for identifying cholera cases during the outbreak. Indian J. Med. Res. 135: 523-528 Pubmed
  2. Patra, T., H. Koley T. Ramamurthy, A. C. Ghose, R. K. Nandy. 2012. The Entner-Doudoroff pathway is obligatory for gluconate utilization and contributes to the pathogenicity of Vibrio cholerae. J. Bacteriol. 194: 3377- 3385 Pubmed
  3. Naha, A., G. P. Pazhani, M. Ganguly, S. Ghosh, T. Ramamurthy, R. K. Nandy, G. B. Nair, Y. Takeda, A. K. Mukhopadhyay. 2012. Development and evaluation of a PCR assay for tracking the emergence and dissemination of Haitian variant ctxB in Vibrio cholerae O1 strains isolated from Kolkata, India. J. Clin. Microbiol. 50: 1733-1736 Pubmed
  4. Das, M., R. K. Nandy, T. S. Bhowmick, S. Yamasaki, A. Ghosh, G. B. Nair, B. L. Sarkar. 2012. Vibrio cholerae typing phage N4: genome sequence and its relatedness to T7 viral supergroup. Intervirology. 55: 185-193. Pubmed

2011

  1. Roy, S., A.K. Singh, R. Viswanathan, R. K. Nandy, S. Basu. 2011. Transmission of imipenem resistance determinants during the course of an outbreak of NDM-1 Escherichia coli in a sick newborn care unit. J. Antimicrob. Chemother. 66: 2773-2780. Pubmed
  2. Patra, T., S. Chatterjee, A. Raychoudhuri, A. K. Mukhopadhyay, T. Ramamurthy, R. K. Nandy. 2011. Emergence and progression of Vibrio cholerae O1 El Tor variants and progenitor strains of Mozambique variants in Kolkata, India. Int. J. Med. Microbiol. 301: 310-317. Pubmed
  3. Ouyang-Latimer, J., S. Jafri, A. VanTassel, Z. D. Jiang, K. Gurleen, S. Rodriguez, R. K. Nandy, T. Ramamurthy, S. Chatterjee, R. McKenzie, R. Steffen, H. L. DuPont. 2011. In vitro antimicrobial susceptibility of bacterial enteropathogens isolated from international travelers to Mexico, Guatemala, and India from 2006 to 2008. Antimicrob. Agents Chemother. 55: 874-878. Pubmed

2010

  1. Mukherjee, P., S. Ghosh, T. Ramamurthy, M .K. Bhattacharya, R. K. Nandy, Y. Takeda, G. B. Nair, A. K. Mukhopadhyay. 2010. Evaluation of a rapid immunochromatographic dipstick kit for diagnosis of cholera emphasizes its outbreak utility. Jpn. J. Infect. Dis. 63: 234-238. Pubmed
  2. Mukherjee, S., N. K. Bardolui, S. Karim, V.V. Patnaik, R. K. Nandy, P. K. Bag. 2010. Isolation and characterization of a monoaromatic hydrocarbon-degrading bacterium, Pseudomonas aeruginosa from crude oil. J. Environ. Sci. Health A Tox. Hazard Subst. Environ. Eng. 45: 1048-1053 Pubmed
  3. Jiang, Z. D., H. L. Dupont, E. L. Brown, R. K. Nandy, T. Ramamurthy, A. Sinha, S. Ghosh, S. Guin, K. Gurleen, S. Rodrigues, J. J. Chen, R. McKenzie, R. Steffen. 2010. Microbial etiology of travelers' diarrhea in Mexico, Guatemala, and India: importance of enterotoxigenic Bacteroides fragilis and Arcobacter species. J. Clin. Microbiol. 48: 1417-1419. Pubmed
  4. Raychoudhuri, A., P. Mukherjee, T. Ramamurthy, R. K. Nandy, Y. Takeda, G. B. Nair, A. K. Mukhopadhyay. 2010. Genetic analysis of CTX prophages with special reference to ctxB and rstR alleles of Vibrio cholerae O139 strains isolated from Kolkata over a decade. FEMS Microbiol. Lett. 303: 107-115 Pubmed

2009

  1. Mahalanabis, D., T. Ramamurthy, G. B. Nair, A. Ghosh, S. Shaikh, B. Sen, M. Thungapathra, R. K. Ghosh, G. P. Pazhani, R. K. Nandy, S. Jana, S. K. Bhattacharya. 2009. Randomized placebo controlled human volunteer trial of a live oral cholera vaccine VA1.3 for safety and immune response. Vaccine. 27: 4850-4856. Pubmed
  2. Chatterjee, S., K. Ghosh, A. Raychoudhuri, G. Chowdhury, M. K. Bhattacharya, A. K. Mukhopadhyay, T. Ramamurthy, S. K. Bhattacharya, K. E. Klose and R. K. Nandy. 2009. Incidence, virulence factors, and clonality among clinical strains of non-O1, non-O139 Vibrio cholerae isolates from hospitalized diarrheal patients in Kolkata, India. J. Clin. Microbiol. 47: 1087-1095. Pubmed
  3. Das, M., T. S. Bhowmick, R. K. Nandy, G. B. Nair and B. L. Sarkar. 2009. Surveillance of vibriophages reveals their role as biomonitoring agents in Kolkata. FEMS Microbiol. Ecol. 67: 502-510. Pubmed
  4. Chatterjee, S., T. Patra, K. Ghosh, A. Raychoudhuri, G. P. Pazhani, M. Das, B. L. Sarkar, R. K. Bhadra, A. K. Mukhopadhyay, Y. Takeda, G. B. Nair, T. Ramamurthy and R. K. Nandy. 2009. Vibrio cholerae O1 clinical strains isolated in 1992 in Kolkata with progenitor traits of the 2004 Mozambique variant. J. Med. Microbiol. 58: 239-247. Pubmed
  5. Raychoudhuri, A., T. Patra, K. Ghosh, T. Ramamurthy, R. K. Nandy, Y. Takeda, G.B. Nair and A.K. Mukhopadhyay. 2009. Classical ctxB in Vibrio cholerae O1, Kolkata, India. Emerg. Infect. Dis. 15: 131-132. Pubmed

2008

  1. Raychoudhuri, A., A.K. Mukhopadhyay, T. Ramamurthy, R. K. Nandy, Y. Takeda and G. B. Nair. 2008. Biotyping of Vibrio cholerae O1: time to redefine the scheme. Indian J. Med. Res. 128: 695-698. Pubmed
  2. Bhowmick, R., A. Ghosal, B. Das, H. Koley, D. R. Saha, S. Ganguly, R. K. Nandy, R. K. Bhadra and N. S. Chatterjee. 2008. Intestinal adherence of Vibrio cholerae involves a coordinated interaction between colonization factor GbpA and mucin. Infect. Immun. 76: 4968-4977. Pubmed
  3. Chattoraj, P., T. Ganguly, R. K. Nandy and S. Sau. 2008. Overexpression of a delayed early gene hlg1 of temperate mycobacteriophage L1 is lethal to both M. smegmatis and E. coli. BMB Rep. 41: 363-368. Pubmed
  4. Raychoudhuri, A., A. Pan, D. Dutta, A. K. Mukhopadhyay, T. Ramamurthy, R. K. Nandy, S. K. Bhattacharya and M. K. Bhattacharya. 2008. Emergence of Tetracycline-Resistant Vibrio cholerae O1 Serotype Inaba, in Kolkata, India. Japanese J. Infect. Dis. 61: 128-129. Pubmed
  5. Saha, D. R., K. Rajendran, T. Ramamurthy, R. K. Nandy and S. K. Bhattacharya. 2008. Intestinal parasitism and Vibrio cholerae infection among diarrhoeal patients in Kolkata, India. Epidemiol. Infect. 136: 661-664. Pubmed

2007

  1. Raychoudhuri, A., S. Chatterjee, G. P. Pazhani, R. K. Nandy, M. K. Bhattacharya, S. K. Bhattacharya, T. Ramamurthy and A. K. Mukhopadhyay. 2007. Molecular characterization of recent Vibrio cholerae O1, El Tor, Inaba strains isolated from hospitalized patients in Kolkata, India. J. Infect. 55: 431-438. Pubmed
  2. Ghosal, A., R. Bhowmick, R. K. Nandy, T. Ramamurthy and N. S. Chatterjee. 2007. PCR based Identification of Common Colonization Factor Antigens of Enterotoxigenic Escherichia coli. J. Clin. Microbiol. 45: 3068-3071. Pubmed
  3. Chatterjee, S., K. Ghosh, A. Raychoudhuri, A. Pan, M. K. Bhattacharya, A. K Mukhopadhyay, T. Ramamurthy, S. K. Bhattacharya and R. K. Nandy. 2007. Phenotypic and genotypic traits and epidemiological implication of Vibrio cholerae O1 and O139 strains in India during 2003. J. Med. Microbiol. 56: 824-832. Pubmed
  4. Sen, B., B. Dutta, S. Chatterjee, M. K. Bhattacharya, R. K. Nandy, A. K. Mukhopadhyay, B. D. N. Gangopadhyay, S. K. Bhattacharya and T. Ramamurthy. 2007. The first outbreak of acute diarrhea due to pandemic strain of Vibrio parahaemolyticus O3:K6 in Kolkata, India. Int. J. Infect. Dis. 11: 185-187. Pubmed

2006

  1. Dutta, B., R. Ghosh, N. C. Sharma, G. P. Pazhani, N. Taneja, A. Raychowdhuri, B. L. Sarkar, S. K. Mondal, A. K. Mukhopadhyay, R. K. Nandy, M. K. Bhattacharya, S. K. Bhattacharya and T. Ramamurthy. 2006. Spread of cholera with newer clones of Vibrio cholerae O1 El Tor, serotype Inaba, in India. J. Clin. Microbiol. 44: 3391-3393. Pubmed
  2. Maiti, D., B. Das, A. Saha, R. K. Nandy, G. B. Nair and R. K. Bhadra. 2006. Genetic organization of pre-CTX and CTX prophages in the genome of an environmental Vibrio cholerae non-O1, non-O139 strain. Microbiology. 152: 3633-3641. Pubmed
  3. Bhattacharya, T., S. Chatterjee, D. Maiti, R. K. Bhadra, Y. Takeda, G. B. Nair and R. K. Nandy. 2006. Molecular analysis of the rstR and orfU genes of the CTX prophages integrated in the small chromosomes of environmental Vibrio cholerae non-O1, non-O139 strains. Environ. Microbiol. 8: 526-534. Pubmed

2005

  1. Nandy, B., R. K. Nandy, A. Sarkar and A. C. Ghose. 2005. Structural features, properties and regulation of the outer-membrane protein W (OmpW) of Vibrio cholerae. Microbiology 151: 2975-2986. Pubmed
  2. Sen, A., R. K. Nandy and A. N. Ghosh. 2005. Ion-swimming speed variation of Vibrio cholerae cells. J. Bioscience. 30: 465-467. Pubmed
  3. Roy, S., B. Dutta, A. R. Ghosh, A. P. Sugunan, R. K. Nandy, S. K. Bhattacharya and S. C. Sehgal. 2005. Molecular tracking of the lineage of strains of Vibrio cholerae O1 biotype El Tor associated with a cholera outbreak in Andaman and Nicobar Islands, India. Trop. Med. Int. Health. 6: 604-611. Pubmed

2004

  1. Sen, A., R. K. Nandy and A. Ghosh. 2004. Elasticity of flagella hooks. J. Elec. Microscopy. 53: 305-309. Pubmed
  2. De, K., T. Ramamurthy, S. M. Faruque, S. Yamasaki, Y. Takeda, G. B. Nair,and R. K. Nandy. 2004. Molecular characterisation of rough strains of Vibrio cholerae isolated from diarrhoeal cases in India and their comparison to smooth strains. FEMS Microbiol. Lett. 232: 23-30. Pubmed
  3. Kahali, S., B. Sarkar, S. Chakraborty, R. Macaden, J. S. Deokule, M. Ballal, R. K. Nandy, S. K. Bhattacharya, Y. Takeda and T. Ramamurthy. 2004. Molecular epidemiology of diarrhoeagenic Escherichia coli associated with sporadic cases and outbreaks of diarrhoea between 2000 and 2001 in India. European J. Epidemiol. 19: 473-479. Pubmed

2003

  1. Khan, A., R. K. Nandy, S. C. Das, T. Ramamurthy, J. Khanam, T. Shimizu, S. Yamasaki, S. K. Bhattacharya, W. Chaicumpa, Y. Takeda and G. B. Nair. 2003. Environmental isolates of Citrobacter braakii that agglutinate with Escherichia coli O157 antiserum but do not possess the genes responsible for the biosynthesis of O157 somatic antigen. Epidemiol. Infect. 130: 179-86. Pubmed
  2. Datta, S., A. Khan, R. K. Nandy, M. Rehman, S. Sinha, S. Chattopadhyay, S. C. Das, G. B. Nair. 2003. Environmental isolates of Aeromonas spp. Harboring the cagA-like gene of Helicobacter pylori. Appl. Environ. Microbiol. 69: 4291-4295. Pubmed

2002

  1. Faruque, S. M., Asadulghani, M. Kamruzzaman, R. K. Nandy, A. N. Ghosh, G. B. Nair, J. J. Mekalanos and D. A. Sack. 2002. RS1 element of Vibrio cholerae can propagate horizontally as a filamentous phage exploiting the morphogenesis genes of CTXphi. Infect Immun. 70: 163-170. Pubmed
  2. Sarkar, A., R. K. Nandy, G. B, Nair and A. C. Ghose. 2002. Vibrio pathogenicity island and cholera toxin genetic element-associated virulence genes and their expression in non-O1, non-O139 strains of Vibrio cholerae. Infect. Immun. 70: 4735-4742. Pubmed

2001

  1. De, K., T. Ramamurthy, A. C. Ghose, M. S. Islam, Y. Takeda, G. B. Nair and R. K. Nandy. 2001. Modification of the Multiplex PCR for Unambiguous Differentiation of the El Tor and Classical Biotypes of Vibrio cholerae O1. Indian J. Med. Res. 114: 77-82. Pubmed
  2. Chakraborty, S., J. S. Deokule, P. Garg, S. K. Bhattacharya, R. K. Nandy, G. B. Nair, S. Yamasaki, Y. Takeda and T. Ramamurthy. 2001. Concomitant infection of enterotoxigenic Escherichia coli in an outbreak of cholera caused by Vibrio cholerae O1 and O139 in Ahmedabad, India. J. Clin. Microbiol. 39: 3241-3246. Pubmed
  3. Mitra, R. K., R. K. Nandy, T. Ramamurthy, S. K. Bhattacharya, S. Yamasaki, T. Shimada, Y. Takeda and G. B. Nair. 2001. Molecular characterization of rough variants of Vibrio cholerae isolated from hospitalized diarrhea patients. J. Med. Microbiol. 50: 268-276. Pubmed

2000

  1. Ramamurthy, T., K. Rajendran, P. Garg, T. Shimada, A. Basu, N. Roychowdhury, R. K. Nandy, S. Yamasaki, S. K. Bhattacharya, Y. Takeda and G. B. Nair. 2000. Cluster-analysis patterns of dissemination of multidrug resistance among clinical strains of Vibrio cholerae in Calcutta, India. Indian J. Med. Res. 112: 78-85. Pubmed
  2. Garg, P., R. K. Nandy, P. Chaudhury, N. Roychowdhury, K. De, T. Ramamurthy, S. Yamasaki, S. K. Bhattacharya, Y. Takeda and G. B. Nair. 2000. Emergence of Vibrio cholerae O1 biotype El Tor serotype Inaba from the prevailing O1 Ogawa serotype strains in India. J. Clin. Microbiol. 38: 4249-4253. Pubmed
  3. Nandi, B., R. K. Nandy, S. Mukhopadhyay, G. B. Nair, T. Shimada, and A. C. Ghose. 2000. A rapid method for the species-specific identification of Vibrio cholerae using primers targeted to the gene of an outer membrane protein OmpW. J. Clin. Microbiol. 38: 4145-4151. Pubmed
  4. Nandi, B., R. K. Nandy and A. C. Ghose. 2000. Molecular characterization of a new variant of toxin-coregulated pilus protein (TcpA) in toxigenic strain of non-O1/ non-O139 Vibrio cholerae. Infect. Immun. 68: 948-952. Pubmed

1999

  1. Nandy, R. K., S. Mukhopadhyay, A. N. Ghosh and A. C. Ghose. 1999. Antibodies to the truncated (short) form of 'O' polysaccharides (TFOP) of Vibrio cholerae O139 lipopolysaccharides mediate protection against challenge with encapsulated O139 strains through inhibition of intestinal colonization. Vaccine. 17: 2844-2852. Pubmed

1998

  1. Sengupta, T. K., R. K. Nandy, S. Mukhopadhyay, R. H. Hall, V. Sathyamoorthy and A. C. Ghose. 1998. Characterization of a 20 kDa pilus protein expressed by a diarrhoeagenic strain of non-O1/ non-O139 Vibrio cholerae. FEMS Microbiol. Lett. 160: 183-189. Pubmed

1997

  1. Ghosh, C., R. K. Nandy, S. K. Dasgupta, G. B. Nair, R. H. Hall and A. C. Ghose. 1997. A search for cholera toxin (CT), toxin coregulated pilus (TCP), the regulatory element ToxR and other virulence factors in non-O1/ non-O139 Vibrio cholerae. Microbial. Pathogenesis. 22: 199-208. Pubmed

1996

  1. Nandy, R. K., M. J. Albert and A. C. Ghose. 1996. Serum antibacterial and antitoxin responses in clinical cholera caused by Vibrio cholerae O139 Bengal and evaluation of their importance in protection. Vaccine. 14: 1137-1142. Pubmed

1995

  1. Nandy, R. K., T. K. Sengupta, S. Mukhopadhyay and A. C. Ghose. 1995. A comparative study of properties of Vibrio cholerae O139, O1 and other non-O1 strains. J. Med Microbiol. 42: 251-157. Pubmed

1994

  1. Nandy, R. K., S. K. Barari and A. C. Ghose. 1994. Expression of antigenically distinct fimbriae with hemagglutination and HeLa cell adherence properties by an enteroaggregative Escherichia coli strain belonging to enteropathogenic serogroup. FEMS Immunol. Med. Microbiol. 9: 143-150. Pubmed

Book Chapters

  1. De, K., R. K. Nandy, and G. B. Nair. 2006. Microbiological and molecular methods to identify and characterize toxigenic Vibrio cholerae from food samples. p. 99-124. In: Adley, C.C. (ed.), Methods in Biotechnology, Vol. 21: Food-Borne Pathogens: Methods and Protocols. Humana Press Inc., Totowa.
  2. Sarkar, A., R. K. Nandy, and A. C. Ghose. 2010. Pathogenic Potential of Non-O1, Non-O139 Vibrio cholere. p. 223-243. In: T. Ramamurthy and S.K. Bhattacharya (Eds), Epidemiological and Molecular Aspects on Cholera. Springer, New York.