title: Bovine leukaemia virus infection in New Zealand cattle.
abstract: Bovine Leukaemia Virus (BLV) infection in New Zealand cattle was investigated. In a national survey of 5000 sera from 500 herds, BLV antibody was not detected. An additional 1062 sera from 140 herds were tested and 3 sera were positive. In the herd of origin of one of these 3 sera, 22.6% of cattle were serologically positive for BLV. Where cases of bovine lymphosarcoma had been diagnosed, 38 of 39 herds tested were negative for BLV antibody. Within the remaining herd, 36% of cows tested were serologically-positive. BLV was isolated from 2 serologically positive cows in this herd.
authors: Animal Health Reference Laboratory, Private Bag, Upper Hutt, New Zealand.
authors: C R
authors: CR
authors: Parrish
authors: R E
authors: RE
authors: Oliver
authors: W
authors: W
authors: Weddell
authors: K C
authors: KC
authors: Corrin