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Int. J. Environ. Res. Public Health 2012, 9(3), 895-915; doi:10.3390/ijerph9030895

Diversity in the Enteric Viruses Detected in Outbreaks of Gastroenteritis from Mumbai, Western India

1
Enteric Viruses Group, National Institute of Virology, 20-A, Dr. Ambedkar Road, Pune 411001, India
2
Department of Pathology, Gokuldas Tejpal Hospital, Lokmanya Tilak Marg, Fort, Mumbai 400001, India
3
Department of Microbiology, Sir Jamshedjee Jeejeebhoy Hospital, Byculla, Mumbai 400008, India
4
Department of Preventive and Social Medicine, Sir Jamshedjee Jeejeebhoy Hospital, Byculla, Mumbai 400008, India
These authors contributed equally to this work.
*
Author to whom correspondence should be addressed.
Received: 24 November 2011 / Revised: 2 February 2012 / Accepted: 1 March 2012 / Published: 14 March 2012
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Abstract

Faecal specimens collected from two outbreaks of acute gastroenteritis that occurred in southern Mumbai, India in March and October, 2006 were tested for seven different enteric viruses. Among the 218 specimens tested, 95 (43.6%) were positive, 73 (76.8%) for a single virus and 22 (23.2%) for multiple viruses. Single viral infections in both, March and October showed predominance of enterovirus (EV, 33.3% and 40%) and rotavirus A (RVA, 33.3% and 25%). The other viruses detected in these months were norovirus (NoV, 12.1% and 10%), rotavirus B (RVB, 12.1% and 10%), enteric adenovirus (AdV, 6.1% and 7.5%), Aichivirus (AiV, 3% and 7.5%) and human astrovirus (HAstV, 3% and 0%). Mixed viral infections were largely represented by two viruses (84.6% and 88.9%), a small proportion showed presence of three (7.7% and 11%) and four (7.7% and 0%) viruses in the two outbreaks. Genotyping of the viruses revealed predominance of RVA G2P[4], RVB G2 (Indian Bangladeshi lineage), NoV GII.4, AdV-40, HAstV-8 and AiV B types. VP1/2A junction region based genotyping showed presence of 11 different serotypes of EVs. Although no virus was detected in the tested water samples, examination of both water and sewage pipelines in gastroenteritis affected localities indicated leakages and possibility of contamination of drinking water with sewage water. Coexistence of multiple enteric viruses during the two outbreaks of gastroenteritis emphasizes the need to expand such investigations to other parts of India.
Keywords: adenovirus; Aichivirus; astrovirus; enterovirus; norovirus; rotavirus; gastroenteritis outbreak adenovirus; Aichivirus; astrovirus; enterovirus; norovirus; rotavirus; gastroenteritis outbreak
This is an open access article distributed under the Creative Commons Attribution License (CC BY 3.0).

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Chitambar, S.; Gopalkrishna, V.; Chhabra, P.; Patil, P.; Verma, H.; Lahon, A.; Arora, R.; Tatte, V.; Ranshing, S.; Dhale, G.; Kolhapure, R.; Tikute, S.; Kulkarni, J.; Bhardwaj, R.; Akarte, S.; Pawar, S. Diversity in the Enteric Viruses Detected in Outbreaks of Gastroenteritis from Mumbai, Western India. Int. J. Environ. Res. Public Health 2012, 9, 895-915.

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