UNSPECIFIED (2002) Study of clinical mastitis in British dairy herds with bulk milk somatic cell counts less than 150,000 cells/ml. VETERINARY RECORD, 151 (6). 170-+. ISSN 0042-4900

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Abstract

A 12-month prospective study of clinical mastitis was conducted in 482 British dairy herds with a bulk milk somatic cell count (BMscc) of less than 150,000 cells/ml. The mean proportion of cows in the herd with clinical mastitis was 23-1 per cent (range 0 to 80), with a mean of 1-50 quarter cases per cow. The mean incidence rate of clinical mastitis was 36.7 quarter cases per 100 cow years (range 0 to 2082). Twelve per cent of the quarter cases showed systemic signs, including inappetence and severe lethargy. Over 22 per cent of quarter cases occurred in the first seven days of lactation and over 50 per cent occurred in the first 90 days of lactation. Cluster analysis indicated that the main difference between herds with a low and average incidence of mastitis was the proportion of clinical cases occurring in the first seven days of lactation, 14 per cent compared with 44 per cent, respectively. The risk of severe clinical mastitis compared with mild clinical mastitis decreased significantly as the individual cow somatic cell count (scc) in the month before clinical mastitis was diagnosed increased.

Item Type:	Journal Article
Subjects:	S Agriculture > SF Animal culture
Journal or Publication Title:	VETERINARY RECORD
Publisher:	BRITISH VETERINARY ASSOC
ISSN:	0042-4900
Date:	10 August 2002
Volume:	151
Number:	6
Number of Pages:	7
Page Range:	170-+
Publication Status:	Published
URI:	http://wrap.warwick.ac.uk/id/eprint/10611

Data sourced from Thomson Reuters' Web of Knowledge

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