respiratory syncytial virus (rsv) bronchiolitis: comparative study of rsv groups a and b infected children.the grouping characteristics of 29 respiratory syncytial virus (rsv) present in nasopharyngeal cells collected from hospitalized children with bronchiolitis during the 1990 rsv season in porto alegre, rs, were analysed. twenty-two were grouped as belonging to group a and 7 to group b. cyanosis, oxygen therapy, cough, length of hospitalization and atelectasis were observed to be more frequently found within group b infected children. other clinical signs and symptoms were similarly found in both ...19948008913
respiratory syncytial virus groups a and b in porto alegre, brazil, from 1990 to 1995 and 1998.we analyzed the respiratory syncytial virus (rsv) groups and their epidemiological pattern that were detected over the course of seven years in southern brazil. the two rsv groups co-circulated each year, but frequencies of groups a and b varied both between and within yearly outbreaks. in 1991, group a predominated over group b (p=0.0016). rsv outbreaks analyzed showed a temperature-dependent pattern and no association with rainfall, similarly to other countries from southern south america. kno ...200111285489
viral etiology of acute respiratory infections among children in porto alegre, rs, brazil.although acute respiratory infections (aris) are a major cause of child morbidity and mortality in southern brazil, little information is available on their seasonality and viral etiology. this study was conducted on children under 5 years of age with ari to assess viral etiology in the state of rio grande do sul, from 1990 to 1992. a total of 862 nasopharyngeal secretion (nps) samples were tested using indirect immunofluorescence. the results showed that 316 (36.6%) nps samples were positive: 2 ...200212170321
respiratory viruses in the pediatric intensive care unit: prevalence and clinical aspects.a survey was conducted in two pediatric intensive care units in hospitals in porto alegre, brazil, in order to monitor the main respiratory viruses present in bronchiolitis and/or pneumonia and their involvement in the severity of viral respiratory infections. viral respiratory infection prevalence was 38.7%. in bronchiolitis, respiratory syncytial virus (rsv) was detected in 36% of the cases. in pneumonia, the prevalence rates were similar for adenovirus (10.3%) and rsv (7.7%). there was a diff ...200415761607
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