Subject(s)

Caliciviridae Infections/epidemiology , Disease Outbreaks , Gastroenteritis/epidemiology , RNA, Viral/genetics , Sapovirus/genetics , Caliciviridae Infections/pathology , Caliciviridae Infections/virology , Child, Preschool , Female , Gastroenteritis/pathology , Gastroenteritis/virology , Humans , Male , Middle Aged , Puerto Rico/epidemiology , RNA, Viral/isolation & purification , Real-Time Polymerase Chain Reaction , Sapovirus/isolation & purification , Sapovirus/pathogenicity