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Microscopic changes in infected bovine teats.

T A Ngatia¹, N E Jensen, B B Berg

¹Department of Veterinary Pathology and Microbiology, Faculty of Veterinary Medicine, University of Nairobi, Kenya.

The British Veterinary Journal

|March 1, 1991

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Inflammatory changes in dairy cow teats are common, often linked to bacterial presence. Microscopic teat examination revealed significant inflammation in most quarters, regardless of milk bacterial counts.

Area of Science:

Veterinary Medicine
Dairy Science
Animal Health

Background:

Teat health is crucial for dairy cow well-being and milk production.
Inflammatory conditions of the teat can impact udder health and milk quality.
Understanding the prevalence and nature of teat inflammation is essential for effective management.

Purpose of the Study:

To investigate the prevalence and characteristics of inflammatory changes in dairy cow teats.
To correlate microscopic teat findings with bacteriological milk sample results.
To determine the association between teat inflammation and bacterial presence in milk.

Main Methods:

Bacteriological examination of quarter milk samples from 68 dairy cows (252 teats).
Microscopic examination of teat tissue to identify inflammatory changes.

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Analysis of teat cisterns, Fürstenberg's rosettes, and teat canals.

Main Results:

169 out of 252 teats (67%) exhibited inflammatory changes.
Inflammation involved neutrophil infiltration, mononuclear cell infiltration, and/or fibrosis.
Bacterial presence in milk was associated with inflammation in 136 cases, but 33 cases showed inflammation without detectable bacteria.
36 of 83 normal teats were bacteriologically positive.

Conclusions:

Teat inflammation is prevalent in dairy cows and can occur with or without detectable bacteria in milk.
Microscopic examination reveals significant inflammatory changes in teat structures.
Further research may be needed to understand the etiology of inflammation in bacteria-negative cases.