Document Detail

Udder shape and teat-end lesions as potential risk factors for high somatic cell counts and intra-mammary infections in dairy cows.
MedLine Citation:
PMID:  18951819     Owner:  NLM     Status:  MEDLINE    
The association of common bacterial pathogens in milk samples during calving with udder shape or the presence of 'teat-end' lesions was investigated in 240 dairy cows from two herds. Sixty-three of 120 cows (53%) in one herd (herd A) and 54/120 animals (45%) in a second herd (herd B) had normal-shaped udders. The remaining animals had udder shapes defined as follows: large pendulous (18% herd A, 26% herd B); large between hindquarter (10% herd A, 17% herd B); overall small (8% herd A, 5% herd B); or small but pendulous (11% herd A, 7% herd B). At calving teat-end lesions were present in 63% and 76% of the quarters of herd A and B animals, respectively. There was no herd effect on udder shape or teat-end lesions. Analysis of variance revealed that udder shape and teat-end lesions did not have a significant association with quarter somatic cell count. However there was some association between mammary infection and udder shape and teat-end lesions. Compared to other udder shapes, cows with large between hindquarter shape had significantly less Staphylococcus aureus and Streptococcus uberis infection (P<0.001). There was a similar albeit less significant negative association with Escherichia coli infection (P<0.01). Infection with Streptococcus agalactiae and Streptococcus dysgalactiae was more frequent in cows with large pendulous and overall small udder conformations. The results also suggest an association between intra-mammary infection at calving and the presence of hyperkeratotic teat-end lesions, given that S. aureus, coagulase-negative staphylococci, S. uberis, S. agalactiae and E. coli were cultured from significantly more quarters with such lesions than from quarters without lesions or with other types of lesion (P<0.001).
Abdul L Bhutto; Richard D Murray; Zerai Woldehiwet
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Publication Detail:
Type:  Journal Article; Research Support, Non-U.S. Gov't     Date:  2008-10-31
Journal Detail:
Title:  Veterinary journal (London, England : 1997)     Volume:  183     ISSN:  1532-2971     ISO Abbreviation:  Vet. J.     Publication Date:  2010 Jan 
Date Detail:
Created Date:  2010-02-03     Completed Date:  2010-03-15     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  9706281     Medline TA:  Vet J     Country:  England    
Other Details:
Languages:  eng     Pagination:  63-7     Citation Subset:  IM    
Copyright Information:
Copyright 2008 Elsevier Ltd. All rights reserved.
Department of Veterinary Clinical Sciences, University of Liverpool Veterinary Teaching Hospital, Leahurst, Neston, Wirral CH64 7TE, UK.
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MeSH Terms
Analysis of Variance
Cell Count / veterinary
Escherichia coli Infections / epidemiology,  microbiology,  pathology,  veterinary
Mammary Glands, Animal / anatomy & histology*,  microbiology,  pathology*
Mastitis, Bovine / epidemiology*,  microbiology*
Milk* / cytology,  microbiology
Risk Factors
Staphylococcal Infections / epidemiology,  microbiology,  pathology,  veterinary
Streptococcal Infections / epidemiology,  microbiology,  pathology,  veterinary

From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine

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