Key result
Porcine rotavirus B was detected in 71.1% of biological samples from newborn piglets with diarrhea, establishing it as a primary causative agent of neonatal diarrhea outbreaks.
Why the study?
Most studies have focused on rotavirus A as a cause of diarrhea outbreaks, while the role of porcine rotavirus B as a primary causative agent required detection and characterization.
Observational (n=90)
Porcine rotavirus B is a primary causative agent of diarrhea outbreaks in newborn piglets and should be included in routine differential diagnosis.
May warrant rotavirus B testing in neonatal piglet diarrhea outbreaks; leaves open questions on causality and targeted interventions.
Rotavirus (RV) is considered a major cause of acute viral gastroenteritis in young animals. RV is classified into nine species, five of which have been identified in pigs. Most studies worldwide have highlighted diarrhoea outbreaks caused by RVA, which is considered the most important RV species. In the present study, we described the detection and characterization of porcine RVB as a primary causative agent of diarrhoea outbreaks in pig herds in Brazil. The study showed a high frequency (64/90; 71.1%) of RVB diagnosis in newborn piglets associated with marked histopathological lesions in the small intestines. Phylogenetic analysis of the VP7 gene of wild-type RVB strains revealed a high diversity of G genotypes circulating in one geographic region of Brazil. Our findings suggest that RVB may be considered an important primary enteric pathogen in piglets and should be included in the routine differential diagnosis of enteric diseases in piglets.
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Miyabe et al. (2020) conducted an observational in Neonatal diarrhea (n=90). Porcine rotavirus B (RVB) was evaluated on Detection of RVB by conventional RT-PCR. Porcine rotavirus B was detected in 71.1% of biological samples from newborn piglets with diarrhea, establishing it as a primary causative agent of neonatal diarrhea outbreaks.
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