Emergence of G9P[8] rotaviruses in children with acute gastroenteritis in Thailand, 2015-2016

Journal of Medical Virology
Wisoot Chan-It, Chulapong Chanta

Abstract

Human group A rotavirus is a major contagious virus causing gastroenteritis in children. Molecular epidemiological study of group A rotavirus infections in hospitalized children was performed by multiplex RT-PCR during 2015-2016 in Chiang Rai, Thailand. G- and P-genotypes of positive rotavirus samples were further analyzed by one-step and two-step multiplex RT-PCR methods. Among 270 fecal specimens tested, rotavirus was the most prevalent (33.7%), followed by norovirus GII (4.1%), adenovirus (3%), and astrovirus (1.5%). Infection was common in patients aged 12-23 months (45.1%) and occurred mostly in children under 3 years of age (85.7%). The highest peak was in a hot month, March (64.8%). G9P[8] emerged as the most predominant (79.1%), followed by G3P[8] (13.2%), G1P[8] (3.3%), and mixed G-types (4.4%). Interestingly, Chiang Rai G9 strains were clustered within a distinct lineage VII including G9 recently reported since 2010-2015. G9-VII also contained four to five unique amino acid substitutions in the VP7 proteins compared with those of the G9 candidate vaccine strain RVA/Human-tc/IND/116E/1985/G9P[11] and the prototype RVA/Human-wt/USA/WI61/1983/G9P[8], defining the G9-VII as a novel variant. G3 strains were closely related...Continue Reading

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Citations

Sep 10, 2019·Journal of Medical Virology·Ratana TacharoenmuangTetsushi Yoshikawa
May 11, 2021·Infection, Genetics and Evolution : Journal of Molecular Epidemiology and Evolutionary Genetics in Infectious Diseases·Nutthawadee JampanilPattara Khamrin

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