2000 Volume 53 Issue 12 Pages 815-819
From January to June 1998, on a feedlot farm in Shimane Prefecture, about 100 calves (20 days to 10 months of age) demonstrated respiratory symptoms accompanied by fever and nasal discharge. Thirty-four of them died. Pneumonic calves on this farm showed relatively high antibody titers to bovine respiratory virus (BRSV). Antibody titers to the following occurred in this order of decreasing prevalence: Pasteurellahaemolytica, Ureaplasmadiversum, Mycoplasmabovis, bovine adenovirus, type 7 (BADV-7) and parainfluenza 3 virus (PIV-3). Calves newly introduced tothe farm showed significant rises in antibody titers toU. diversumin spite of low antibody titers toP. haemolytica, M. bovis, BADV-7, PIV-3, and BRSV.
