| a farming systems study of abortion in dairy cattle on the atherton tableland. 2. the pattern of infectious diseases. | the role of infectious agents on dairy farms on the atherton tableland in tropical north queensland was studied as part of a comprehensive investigation into the causes of bovine abortion. the prevalence of antibody in serums collected from 7 herds whose annual abortion rates ranged from 3% to 21% were as follows: leptospira hardjo 49.9% (426/853), l. pomona 0.4% (3/851), bovine virus diarrhoea (bvd) 33.7% (35/104). infectious bovine rhinotracheitis virus (ibr) 11.5% (12/105), akabane virus 92.2 ... | 1989 | 2505741 |
| seroprevalence survey of aino virus infection in dairy cattle of fukuoka, japan in 1990. | the seroprevalence and seroconversion to aino virus infection were epidemiologically analyzed in fukuoka prefecture, by a cohort study, in 1990. serum samples (872) were taken from 436 cattle of 128 farms in five different districts at twice sampling with four month-intervals and were tested by a serum neutralizing test with aino virus. in the first sampling (may-july), 38.3% of sera and 40.6% of farms tested were positive and 33.3% of cattle and 40.6% of farms were sero-converted during the per ... | 1995 | 7756398 |
| isolation of aino virus from an aborted bovine fetus. | a male fetus of gestation day 187 was aborted from a holstein-friesian cow in an epizootic of the aino virus (ainov) in september 1995. neutralizing antibody titers against ainov were 1:128, 1:16 and 1:64 in the dam serum, fetal ascites and cerebrospinal fluid, respectively. a 10% brain suspension of the aborted fetus was prepared immediately after autopsy, rinsed three times and sonicated before centrifugation. the supernatant was then inoculated into hmlu-1 cell cultures. a cytopathic effect w ... | 1998 | 9819769 |