Fatal mastitis of dairy cows: a retrospective study.

AUTOR(ES)

Hazlett, M J

RESUMO

The necropsy records of dairy cows with mastitis were reviewed from the provincial veterinary laboratory in Guelph (44 cases of mastitis in nine years) and from the Ontario Veterinary College (168 cases in 14 years). Mastitis was considered to be the primary cause of death in 167 of 212 cows (79%). Of these 167 cases of mastitis, Escherichia coli was involved in 107 (64%), Klebsiella sp. in 12 (7%) and Staphylococcus aureus in 11 (7%). Bacteriology was not reported in 22 cases. Coliform mastitis, the most commonly identified type of fatal mastitis, was characterized histologically by the presence of infarcted areas in affected glands and by the lack of demonstrable bacteria, and was thus easily identified from fatal mastitis caused by S. aureus.

Documentos Relacionados

• Identification of Nonlipophilic Corynebacteria Isolated from Dairy Cows with Mastitis
• Molecular Epidemiology of Streptococcus uberis Isolates from Dairy Cows with Mastitis
• Interrelationships between postpartum events, hormonal therapy, reproductive abnormalities and reproductive performance in dairy cows: a path analysis.
• Interrelationships between ambient temperature, age at calving, postpartum reproductive events and reproductive performance in dairy cows: a path analysis.
• Spatial Dependence of Udder Surface Temperature Variation in Dairy Cows with Healthy Status and Mastitis