Hyperkeratoses of the teat: What are the causes?
2011
Rudovsky, H.-J., Dr. Hans-Juergen Rudovsky, Leipzig (Germany) | Pache, St. | Schulz, J.
In a herd with 130 HF cows (herd average 9065 kg milk/year), the teat tips of all lactating cows were examined monthly over a 24 month period according to the 5-stage key. This intensive inspection, coupled with regular servicing of the milking parlour (FGM 2x7), ensured consistent milking conditions in the trial. For the statistical analysis, the severity levels of the hyperkeratoses observed were also log-transformed. Hyperkeratoses are chiefly caused by compressive loading during pulsation and adherence time of the teat-cup cluster. The frequency of occurrence as well as the severity and course of hyperkeratoses are demonstrably influenced by seasonal climate fluctuations, teat-dip quality, number of lactations and lactation status, as well as by resting behaviour and feed. Comparisons of farms and factories in terms of the occurrence of hyperkeratoses may only be made by bearing in mind management and seasonal environmental conditions. Genetic effects were also surmised, which have yet to be tested on a larger number of animals.
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