Five serological assays: the buffered plate antigen test, the standard tube agglutination test, the complement fixation test, the hemolysis-in-gel test and the indirect enzyme immunoassay were diagnostically evaluated. Test data consisted of results from 1208 cattle in brucellosis-free herds, 1578 c...

Factors which influence somatic cell counts in bovine milk are reviewed and guidelines for their interpretation are presented. It is suggested that the thresholds of 300 000 and 250 000 cells/ml be used to identify infected quarters and cows respectively. However, it is stressed that somatic cell co...

A computerized health and production information network (APHIN: Animal Productivity and Health Information Network) was developed in Prince Edward Island (P.E.I.) to serve the livestock industries. The dairy portion of the network is designed primarily to aid in the reduction of the unit cost of pr...

A previously reported increase in Nocardia mastitis in Canada was associated with the use of neomycin-based dry cow mastitis preparations; their production and distribution ceased in 1989. Since then the frequency of Nocardia isolations has declined in most provinces, particularly in British Columbi...

This paper summarizes the results of a project carried out between 1979 and 1982. The work is reported fully in six papers which are being published in Preventive Veterinary Medicine. [For Part 1 see VB 54, 1771]..