| prevalence of human astrovirus genotypes associated with acute gastroenteritis among children in belém, brazil. | worldwide human astroviruses (hastv) have increasingly been recognized as causative agents of viral gastroenteritis, mainly in infants and young children. the aim of this study was to assess the epidemiology and genotype diversity of hastvs detected in children who participated in a trial in belém, brazil with the rhesus human reassortant rotavirus vaccine tetravalent (rrv-tv). from april/1990 to august/1992, 624 diarrheic stool samples were tested by enzyme immunoassay (eia) for hastv, with a p ... | 2007 | 17385695 |
| first detection of a human astrovirus type 8 in a child with diarrhea in belém, brazil: comparison with other strains worldwide and identification of possible three lineages. | this study describes the genetic relationships of the first human astrovirus type-8 (hastv-8) detected in belém-brazil, during a public hospital-based study. this strain was compared with other hastv-8 strains identified elsewhere which have sequences available at genebank. the regions orf1a (primers mon348/mon340) and orf2 (primers mon269/mon270) were analyzed by nucleotide sequencing and a high similarity rate was observed among the belém strain and other hastv-8 strains. in orf1a, homology va ... | 2007 | 17612775 |