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]..

A path analytic approach was used to study data collected on 23 traits of 226 Holstein-Friesians in a commercial dairy herd during May 1981-Oct. 1982. Rectal palpation to assess uterine involution and ovarian activity was performed at 15, 24 and 28 days post partum, and blood samples were collected ...

Information systems projects in developing countries often run into difficulties and fail to meet their full objectives. This paper looks at the commonly used and recommended methodologies to determine if they fit with the objectives set for information systems and if they are appropriate for the hu...

Three methods of assessing mastitis therapies are evaluated: (i) in vitro tests; (ii) experimental studies based on induced infections; (iii) field trials on commercial farms utilizing naturally occurring infections..