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MOLECULAR EPIDEMIOLOGY OF SAPOVIRUS IN CHILDREN LIVING IN THE NORTHWEST AMAZON REGION
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Sapovirus is an important etiological agent of acute gastroenteritis (AGE), mainly in
children under 5 years old living in lower-income communities. Eighteen identified sapovirus
genotypes have been observed to infect humans. The aim of this study was to identify sapovirus
genotypes circulating in the Amazon region. Twenty-eight samples were successfully genotyped
using partial sequencing of the capsid gene. The genotypes identified were GI.1 (n = 3), GI.2 (n = 7),
GII.1 (n = 1), GII.2 (n = 1), GII.3 (n = 5), GII.5 (n = 1), and GIV.1 (n = 10). The GIV genotype was the
most detected genotype (35.7%, 10/28). The phylogenetic analysis identified sapovirus genotypes
that had no similarity with other strains reported from Brazil, indicating that these genotypes may
have entered the Amazon region via intense tourism in the Amazon rainforest. No association
between histo-blood group antigen expression and sapovirus infection was observed.
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