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Field study on the relationship between teat thickness changes and intramammary infections

Published online by Cambridge University Press:  01 June 2009

Alfonso Zecconi ,
Valerio Bronzo ,
Renata Piccinini ,
Paolo Moroni  and
Gianfranco Ruffo
Alfonso Zecconi
Affiliation:
Istituto di Malattie Infettive, Profilassi e Polizia Veterinaria, CNR Centro Studio Patologia della Mammella, Università degli Studi di Milano, Via Celoria 10, I-20133 Milano, Italia
Valerio Bronzo
Affiliation:
Istituto di Malattie Infettive, Profilassi e Polizia Veterinaria, CNR Centro Studio Patologia della Mammella, Università degli Studi di Milano, Via Celoria 10, I-20133 Milano, Italia
Renata Piccinini
Affiliation:
Istituto di Malattie Infettive, Profilassi e Polizia Veterinaria, CNR Centro Studio Patologia della Mammella, Università degli Studi di Milano, Via Celoria 10, I-20133 Milano, Italia
Paolo Moroni
Affiliation:
Istituto di Malattie Infettive, Profilassi e Polizia Veterinaria, CNR Centro Studio Patologia della Mammella, Università degli Studi di Milano, Via Celoria 10, I-20133 Milano, Italia
Gianfranco Ruffo
Affiliation:
Istituto di Malattie Infettive, Profilassi e Polizia Veterinaria, CNR Centro Studio Patologia della Mammella, Università degli Studi di Milano, Via Celoria 10, I-20133 Milano, Italia
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Summary

The aim of this study was to describe the results of teat thickness measurement applied routinely in three commercial dairy herds and to evaluate the influence of machine-induced teat thickness changes on intramammary infection and the frequency of new infection. A total of 1018 fore milk samples and the same number of teat apex measurements have been evaluated. Overall, relative teat thickness changes were normally distributed (mean −0·16%, SD 10·15%), while a specific pattern could be observed within herds. Increases in teat thickness of > 5% were significantly associated with infection and new infection (odds ratio > 1), but the association was not significant when teat thickness decreased by more than 5%. When results were classified according to aetiology, analysis showed that coagulase-negative staphylococcal infections were significantly associated with both increases and decreases in teat thickness numerically greater than 5%.

Type
Original Articles
Information
Journal of Dairy Research , Volume 63 , Issue 3 , August 1996 , pp. 361 - 368
Copyright
Copyright © Proprietors of Journal of Dairy Research 1996

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References

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