PMID: 6397184Nov 1, 1984Paper

A small episode of single quarter coliform infections in lactating dairy cows kept at pasture

Australian Veterinary Journal
K G Johnston, A W English

Abstract

For a period of 150 days, an Escherichia coli infection in a single quarter of the udder of 13 cows occurred on average every 9 days, in a herd of 120 cows kept at pasture under temperate environmental conditions. Most cases were clinically mild, affecting cows in lactations 1 to 10 and at all stages of lactation; none were evident at calving. Samples of secretion from infected quarters sometimes had few demonstrable organisms. Eleven different serotypes in 8 (0) groups were recovered; one isolate was multiply resistant to antibiotics and one infection persisted for 120 days. A precise explanation for this episodic exacerbation of the new infection rate was not established, but probable contributing factors were recognised.

References

Jan 1, 1979·Journal of Dairy Science
Sep 29, 1979·The Veterinary Record·A W Hill, A L Shears
Feb 11, 1978·The Veterinary Record·A Marr
May 12, 1973·The Veterinary Record·G C Brander
Jul 1, 1983·In Practice·E Jackson, J Bramley
Aug 1, 1983·Journal of Dairy Science·K L Smith
Apr 1, 1982·Australian Veterinary Journal·R C DanielA J Frost
Jul 12, 1980·The Veterinary Record·E R Jackson

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