Congenital cataracts in an Ayrshire herd: a herd case report

An outbreak of acute swine erysipelase in a herd

Phenotypic relationship of yield and type scores from first lactation with herd life and profitability.

Milk records from Ayrshire, Brown Swiss, Guernsey, Jersey, and Milking Shorthorn cows that first calved between 18 and 35 mo were combined with scores for linear type traits collected before 43 mo during first lactation to study herd life and lifetime profitability. Profitability (discounted relative net income) was the value of milk, calves, and cow salvage minus fixed costs, operating costs, ...

Genetic evaluation of herd life in Canada: Current status and future outlook

Official genetic evaluations for dairy sires have been published in Canada since the winter of 1996. Evaluations are available for five major breeds (Ayrshire, Brown Swiss, Guernsey, Holstein, and Jersey). The most recent evaluation for Holsteins included records from 1,652,884 daughters of 80,197 sires, of which 5900 were eligible for official publication. Published evaluations combine informa...

Vla Monthly Surveillance Report

Parasitic Gastroenteritis(PGE) Penrith diagnosed PGE in a 10-week-old Limousin-X calf which had been at pasture for three weeks before developing diarrhoea. Parasitological examination revealed 5100 trichostrongyle eggs per gram faeces and 1700 coccidial oocysts. Langford diagnosed PGE on eight occasions in six to twelve month old calves Trichostrongyle sp. worm egg counts of up to 4,550 epg we...

An Unusual Congenital Malformation in a Calf with Serological Evidence of Foetal Bovine Viral Diarrhoea Virus Infection

Bovine viral diarrhoea (BVD) virus is maintained in the environment by persistently infected animals (Derget & Loewen, 1995). The BVD virus in an immunocompetent pregnant animal is capable of crossing the placental barrier and invading the foetus (Kahrs 1973, Done et al. 1980). The principal determinant of foetal response to infection is the age of the foetus at the time of infection (Baker 198...