| infection with hepatitis a and tt viruses and socioeconomic status in rio de janeiro, brazil. | the prevalence of antibodies directed against the enterically transmitted hepatitis a virus (hav) was measured in 2 groups of people living in rio de janeiro, brazil. of 1,056 health care workers (hcws), 778 (73.7%) were anti-hav positive. a high prevalence of anti-hav antibodies (85.7%) was also found among 274 voluntary blood donors (bds). tt virus (ttv) is a dna virus that has been found in the sera of patients with post-transfusion hepatitis of unknown etiology. occurrence of virus shedding ... | 2001 | 11233846 |
| high frequency of mixed tt virus infections in healthy adults and children detected by a simplified heteroduplex mobility assay. | recombinant plasmids carrying 199 base pairs (bp) inserts from the non coding region (nucleotides (nt) 6-204) of the tt virus (ttv) genome were used to standardize an heteroduplex mobility assay able to detect mixed infections of a single individual with several ttv isolates. in this simplified heteroduplex mobility assay, polymerase chain reaction (pcr) products were analyzed directly by polyacrylamide gel electrophoresis, without requirement for post-pcr denaturation and annealing steps of the ... | 2002 | 11849690 |