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Molecular epidemiology of norovirus infections in children and adults: sequence analysis of region C indicates genetic diversity of NVGII strains in Kolkata, India

  • S. M. NATARAJU (a1), M. PATIVADA (a1), D. CHATTERJEE (a1), M. K. NAYAK (a1), B. GANESH (a1), M. K. BHATTACHARYA (a2), T. RAMAMURTHY (a3), S. GANGULY (a4), D. R. SAHA (a5), K. RAJENDRAN (a6), M. GHOSH (a7), N. KOBAYASHI (a8) and T. KRISHNAN (a1)...

Summary

Faecal specimens of diarrhoea cases (n=2495, collected between November 2007 and October 2009) from Infectious Diseases and Beliaghata General (ID&BG) Hospital, Kolkata, India, were screened by RT–PCR using specific primers targeting region C of the capsid gene of noroviruses (NoVs) to determine the seasonal distribution and clinical characteristics of NoVs associated with diarrhoea. NoV infection was detected in 78 cases, mostly in children aged <2 years. In 22/78 positive cases, the virus was detected as the sole agent; others were as mixed infections with other enteric pathogens. Sequencing of NVGII strains showed clustering with GII.4 NoVs followed by GII.13 and GII.6 NoVs. Clinical characteristics of the diarrhoeic children and adults in Kolkata indicated that NoV infections were detected throughout the year and were associated with a mild degree of dehydration.

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Copyright

Corresponding author

*Author for correspondence: Dr T. Krishnan, Scientist-D, Division of Virology, National Institute of Cholera & Enteric Diseases, P-33, C.I.T. Road, Scheme-XM, Beliaghata, Kolkata-700010, West Bengal, India. (Email: drtriveni.krishnan@gmail.com)

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Keywords

Molecular epidemiology of norovirus infections in children and adults: sequence analysis of region C indicates genetic diversity of NVGII strains in Kolkata, India

  • S. M. NATARAJU (a1), M. PATIVADA (a1), D. CHATTERJEE (a1), M. K. NAYAK (a1), B. GANESH (a1), M. K. BHATTACHARYA (a2), T. RAMAMURTHY (a3), S. GANGULY (a4), D. R. SAHA (a5), K. RAJENDRAN (a6), M. GHOSH (a7), N. KOBAYASHI (a8) and T. KRISHNAN (a1)...

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