| molecular epidemiology of astrovirus type 1 in belém, brazil, as an agent of infantile gastroenteritis, over a period of 18 years (1982-2000): identification of two possible new lineages. | human astroviruses (hastv) are worldwide recognized as important viral enteropathogens during childhood. this study aims to determine the incidence, genetic diversity and intertype variability of hastv-1 in children less than 5 years of age enrolled in several studies conducted in belém/pará, and são luís/maranhão, brazil, from december 1982 to may 2000. using eia and rt-pcr, an overall positivity of 6.1% (155/2.534) was achieved, of these, 140 were positive by rt-pcr. the analysis of a 348bp or ... | 2007 | 17714822 |
| prevalence and genetic diversity of astroviruses in children with and without diarrhea in são luís, maranhão, brazil. | human astroviruses (hastv) have been increasingly identified as important etiological agents of acute gastroenteritis in children up to five years old. the aim of this study was to determine the prevalence and genotype diversity of hastv in children with symptomatic and asymptomatic infections in são luís, maranhão, brazil. from june 1997 to july 1999 a total of 183 fecal samples 84 from symptomatic and 99 from asymptomatic children were tested by enzyme immunoassay for hastv. prevalence rates w ... | 2006 | 16410955 |