| serological and molecular screening for viruses in blood donors from ntcheu, malawi: high prevalence of hiv-1 subtype c and of markers of hepatitis b and c viruses. | the prevalence of antibodies to human immunodeficiency virus type 1 (hiv-1), hepatitis c virus (hcv), human t lymphotropic virus i (htlv-i), and hepatitis b (hbv) surface antigen (hbsag) was determined in blood donors from ntcheu, malawi. each donation was also screened for hiv-1 rna and hcv rna. among 159 blood donations, the prevalence of hiv-1 infection was 10.7%, 8.1% for hbv carriage, 6.8% for anti-hcv, and 2.5% for anti-htlv-i. hiv-1/htlv-i and hiv-1/hcv dual infections were observed in 1. ... | 2001 | 11505436 |