The study highlights the dynamic nature of circulating norovirus recombinant strains in Thailand, with a shift from GII.2[P16] to GII.4[P16] and GII.4[P31] between 2017 and 2018.
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Norovirus surveillance in Thai children remains clinically relevant; leaves open optimal regional prevention strategies.
In the present study, the prevalence of norovirus infection in children with acute gastroenteritis in Chiang Mai, Thailand between 2017 and 2018 was 14.9%. A variety of norovirus genotypes were detected, including GI.5, GII.2, GII.3, GII.4, GII.6, GII.7, GII.13, GII.14, and GII.17 with the predominance of GII.4 genotype. In addition, several norovirus recombinant strains (GII.2[P16], GII.3[P16], GII.4[P16], GII.4[P31], GII.6[P7], GII.13[P16], and GII.14[P7]) had been identified. Our results revealed that GII.2[P16] was a predominant strain till the end of 2017 and then was replaced by GII.4[P16] and GII.4[P31] in 2018. The findings imply that norovirus recombinant strains emerged in Chiang Mai, Thailand and that circulating strains changes over time.
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Khamrin et al. (2022) studied this question.
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