| duck hepatitis b virus and liver diseases. | the presence of duck hepatitis b virus in serum was studied in 61 ducks (24 from chi-tung county, china, 20 from changchun, china, and 17 from chiba, japan) with relation to liver disease. none of the 37 ducks from chiba and changchun was positive for duck hepatitis b virus as assayed by electron microscopy, endogenous deoxyribonucleic acid-polymerase activity, and hybridization with duck hepatitis b virus deoxyribonucleic acid. no liver disease was seen in these ducks. in contrast, viruslike pa ... | 1983 | 6190699 |
| geographical pathology of duck livers infected with duck hepatitis b virus from chiba and shimane in japan and shanghai in china. | in order to evaluate geographical differences in the liver pathology of ducks infected with duck hepatitis b virus (dhbv), ducks in chiba and shimane, japan, and shanghai, china, were investigated. the numbers (dhbv positive/negative) and the maximum age of the ducks examined were 18/10 at 19 mo, 15/1 at 3 yr 4 mo, and 72/27 at 18 mo, respectively. dhbv infection was induced experimentally in ducks from chiba and shimane but was present congenitally in those from shanghai. ducks were examined re ... | 1988 | 3342410 |