Detection of uncommon rotavirus a strains P[8]G8 and P[4]G8 in the city of Rio de Janeiro, 2002

Group A rotaviruses (RV-A) are the major cause of gastroenteritis in infants and young children around the world. Each year RV-A causes approximately 11 million episodes of severe diarrhea, with an estimated of 611,000 deaths. Epidemiologic surveys have identified P[8]G1, P[4]G2, P[8]G3, P[8]G4, and...

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Published in:Journal of medical virology 2010-07, Vol.82 (7), p.1272-1276
Main Authors: Gómez, M.M, Volotão, E.M, de Mendonça, M.C. Lima, Tort, L.F.L, da Silva, M.F.M, Leite, J.P.G
Format: Article
Language:English
Subjects:
Brazil - epidemiology
Diarrhea - epidemiology
Diarrhea - virology
gastroenteritis
genotype G8
Humans
Molecular Epidemiology
Phylogeny
Reassortant Viruses - classification
Reassortant Viruses - genetics
Reassortant Viruses - isolation & purification
reassortment
RNA, Viral - genetics
Rotavirus - classification
Rotavirus - genetics
Rotavirus - isolation & purification
rotavirus A
Rotavirus Infections - epidemiology
Rotavirus Infections - virology
Urban Population
virus evolution
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Summary:Group A rotaviruses (RV-A) are the major cause of gastroenteritis in infants and young children around the world. Each year RV-A causes approximately 11 million episodes of severe diarrhea, with an estimated of 611,000 deaths. Epidemiologic surveys have identified P[8]G1, P[4]G2, P[8]G3, P[8]G4, and P[8]G9 as the most common global genotypes associated with diarrhea in children up to 5-year old. Surveillance studies and documentation of RV-A G and P genotypes is necessary for a comprehensive evaluation of the evolution of new strains, and assessing the capability of vaccines to provide heterotypic protection. It is known that reassortments are the driving force for genetic diversity through sudden changes in RV-A genome. In this study, we identified two unusual P/G combinations, P[8]G8 and P[4]G8, occurring in Rio de Janeiro during 2002. Results obtained in this study suggest that P[8]G8 RV-A strain originated from a reassortment event that occurred between RV-A P[4]G8 and P[8]G9 strains circulating in Rio de Janeiro in the same year. G8 strains identified in this study, as well as G8 strains detected in Recife by Montenegro et al. [Montenegro et al. (2007) J Med Virol 79: 335-340], showed a close genetic relationship with strains from Africa, where this genotype have become prevalent. J. Med. Virol. 82: 1272-1275, 2010.
ISSN:0146-6615
1096-9071
DOI:10.1002/jmv.21769