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Journal of Clinical Microbiology, February 2007, p. 432-437, Vol. 45, No. 2
0095-1137/07/$08.00+0     doi:10.1128/JCM.01710-06
Copyright © 2007, American Society for Microbiology. All Rights Reserved.

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

Departments of Gastrointestinal Sciences,¹ Community Health, Christian Medical College, Vellore, India,² London School of Hygiene and Tropical Medicine,³ Virus Reference Department, Centre for Infection, Health Protection Agency, London, United Kingdom,⁴ Department of Molecular Virology and Microbiology, Baylor College of Medicine, Houston, Texas⁵

Received 18 August 2006/ Returned for modification 5 October 2006/ Accepted 20 November 2006

Rotavirus infections by G12 strains in several countries have recently been described. In this study, we report the emergence of G12 strains in south India. Fourteen cases of G12 infection were identified between June and September 2005. G12 was seen in combination with P[6], P[8], or nontypeable P type. Nine cases, including five symptomatic infections and four asymptomatic infections, were identified as part of routine surveillance for rotavirus infections in a birth cohort in the community between June and July 2005. Significant temporal and time-space clustering of eight of these cases represents a possible recent introduction of a new rotavirus VP7 genotype. Previous rotavirus infections had been documented for six of the nine children in the community. In the following 2 months, five cases of G12 infection were identified among children presenting to a referral hospital with diarrhea. This is the first description of symptomatic and asymptomatic G12 infections in children in the community. The detection of G12 strains from different parts of the world in recent years suggests the possibility of its emergence as an important global genotype. Monitoring of cocirculating rotavirus strains and detection of emerging strains is important in the context of the availability of rotavirus vaccines.

Published ahead of print on 29 November 2006.

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