Key result
Rotavirus vaccine strains Rotarix and RotaTeq were detected in 14% and 31% of oyster samples, respectively, while wild-type rotavirus A was detected in 54% of samples.
Observational (n=314)
Rotavirus vaccine strains are detectable in oysters and sewage, and their quantification allows for more accurate monitoring of wild-type rotavirus contamination in aquatic environments.
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Oyster monitoring tracks wild-type RVA in sewage; leaves open whether it predicts gastroenteritis cases.
We quantified rotavirus A (RVA), Rotarix, and RotaTeq strains in oyster and sewage samples during two gastroenteritis seasons and revealed the exact contamination of wild-type RVA by subtracting the quantitative value of rotavirus vaccine strains from that of RVA. The concentration of wild-type RVA was significantly correlated between oysters and sewage, although no significant correlation was seen between wild-type RVA concentration in sewage and the number of rotavirus-associated gastroenteritis cases. This finding suggested the existence of asymptomatic patients and that monitoring of rotavirus vaccine strain could be useful to understand the trend of wild-type RVA and rotavirus outbreak in detail. We believe that our study makes a significant contribution to the literature because it reports the detection of rotavirus vaccine strains in oysters.
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Ito et al. (2021) conducted an observational in Rotavirus contamination (n=314). Rotavirus vaccine strains (Rotarix and RotaTeq) vs. Wild-type rotavirus A was evaluated on Positive detection rate in oysters. Rotavirus vaccine strains Rotarix and RotaTeq were detected in 14% and 31% of oyster samples, respectively, while wild-type rotavirus A was detected in 54% of samples.
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