| prevalence of hepatitis a antibodies in swiss travellers. | to assess the prevalence of antibodies to hepatitis a virus (anti-hav) in future travellers, all visitors to the zurich university vaccination center in july/august 1990 were invited to participate in a cross-sectional study. a total of 1126 future travellers were recruited to have a blood sample drawn and to complete a brief questionnaire. among these, 35 refused or were excluded, thus 1091 were evaluated. the overall prevalence of anti-hav was 16.5%. this rate was 5.9% in future travellers bor ... | 1993 | 8386103 |
| [infection with hepatitis viruses hav, hbv and hcv as well as with aids virus hiv in drug addicts of the zurich street scene--a prevalence study]. | 382 i.v. drug abusers were tested for a past or ongoing infection with the hepatitis viruses a (hav), b (hbv), the newly discovered c (hcv) and with the aids virus hiv. the cohort studied was representative for i.v. drug users of the zurich street scene including occasional users, weekend users and severe drug addicts. 56% of the drug users tested showed hbv markers. 21% had an ongoing infection. 32% were naturally hbv immune and 4% showed immunity due to vaccination. hav markers were detected i ... | 1990 | 2160123 |