| viral hepatitis in colombia: a study of the "hepatitis of the sierra nevada de santa marta". | the prevalences of hepatitis b virus (hbv), hepatitis delta virus and hepatitis a virus infections were studied in two regions of colombia. in bogota, 10 of 53 patients with acute hepatitis were hbsag positive and three of these were hepatitis d antigen positive. hepatitis a virus was the major cause of acute hepatitis in this group. in 366 healthy controls from bogota, 1.6% were hbsag positive and 7.1% had at least one marker of hbv infection. in northern colombia, individuals from three villag ... | 1985 | 3979961 |