An outbreak of Pseudomonas mastitis

Authors: Coats LM
Publication: New Zealand Veterinary Journal, Volume 46, Issue 1, pp 39, Feb 1998
Publisher: Taylor and Francis

Animal type: Cattle, Livestock, Production animal, Ruminant
Subject Terms: Bacterial, Mammary gland/udder, Mastitis, Infectious disease, Milk, Disease/defect, Respiratory system
Article class: Correspondence

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Abstract: Pseudomonas aeruginosa infection has been reported in association with an outbreak of mastitis following intramammary infusion of cows with dry cow therapy. The mastitis in that case was clinically severe and the reported mortality rate was 17%. The contaminated material was infused at drying off and the cows became affected soon after calving (2-3 months later). We report a similar outbreak of mastitis in a Thames Valley dairy herd. The outbreak began after cows were treated with a dry cow therapy in April 1997. In this case, three cows died within 36 hours of receiving dry cow therapy. The affected cows developed mastitis, became systematically ill, and one had profuse diarrhoea. A heavy growth of P. aeruginosa was cultured from one quarter post mortem. On the day of drying off, the cows had come in very soiled. As a result, udders were washed with water from the high pressure hose before being milked. After milking, the teats..

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