RESUMO
The molecular epidemiology of a recent norovirus (NoV) outbreak in Brazil performed by comparative analysis with Genebank NoV sequences showed that the GII.4 strain was responsible for 72.5% of all NoV-positive cases (58/80). Other detected NoV strains included GII.3 (7/80; 8.8%) and GII.9 (8/80; 10%). This is the first outbreak reported in Bahia state, Brazil, during June-July of 2006, where NoV was identified as the principal etiologic agent in hospitalized young adults with acute gastroenteritis symptoms. These findings suggest that GII.4 is a predominant circulating genotype in NoV outbreaks in Brazil.
Assuntos
Infecções por Caliciviridae/epidemiologia , Surtos de Doenças , Gastroenterite/epidemiologia , Epidemiologia Molecular , Norovirus/genética , Doença Aguda , Adulto , Brasil/epidemiologia , Variação Genética , Humanos , FilogeniaRESUMO
The role of Blastocystis hominis as a human pathogens is controversial, although there is some evidence suggesting that it is agent implicated in causing diarrhea in immunocompromised patients. We report 6 cases of AIDS patients presenting with diarrhea with no agents identified in their stools except B. hominis. In all cases, treatment was followed by complete recovery from symptoms and clareance of B. hominis from the patients' stools. In 2 cases, relapse of diarrhea was followed by a positive stool examination for B. hominis oocysts, which again disappeared after treatment. These findings provide additional evidence for considering B. hominis a potential intestinal pathogen in AIDS patients.
