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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

REFERENCES

Bronzo, V., Hamann, J. & Zecconi, A. 1995 Changes in anatomical, cytological and biochemical parameters of the teat associated with the use of three different milking units. IDF Seminar, Tel Aviv 1 S4 110–113Google Scholar
Fleiss, J. L. 1981 Statistical Methods for Rates and Proportions, 2nd edn. New York: John Wiley & SonsGoogle Scholar
Grommers, F. J., Van De Geer, D. & Veen, C. A. A. in't 1985 Duration of bovine intramammary infections in commercial dairy herds. Veterinary Record 116 581–584CrossRefGoogle ScholarPubMed
Hamann, J. 1985 Measurement of machine milking induced teat tissue reactions. Milchwissenschaft 40 16–18Google Scholar
Hamann, J. 1989 Machine milking and new infection risk. Proceedings, International Conference on Mastitis, St Goorgen, Austria113–122Google Scholar
Hamann, J., Burvenich, C., Mayntz, M., Østerås, O. & Haider, W. 1994 Machine induced changes in the status of the bovine teat with respect to the new infection risk. Brussels: IDF (International Dairy Federation Bulletin no. 297 13–22)Google Scholar
Hamann, J. & Mein, G. A. 1988 Responses of the bovine teat to machine milking: measurement of changes in thickness of the teat apex. Journal of Dairy Research 55 331–338CrossRefGoogle Scholar
Hamann, J. & Mein, G. A. 1990 Measurements of machine-induced changes in thickness of the bovine teat. Journal of Dairy Research 57 495–505CrossRefGoogle ScholarPubMed
Hamann, J., Mein, G. A. & Wetzel, S. 1993 Teat tissue reactions to milking: effects of vacuum level. Journal of Dairy Science 76 1040–1046CrossRefGoogle ScholarPubMed
International Dairy Federation 1981 Laboratory Methods for Use in Mastitis Work. Brussels: IDF (International Dairy Federation Bulletin no. 132)Google Scholar
Kleinbaum, D. G., Kupper, L. L. & Morgenstern, H. 1982 Epidemiologic Research – Principles and Quantitative Methods. New York: Van Nostrand ReinholdGoogle Scholar
Myllys, V., Honkanen-Buzalski, T., Virtanen, H., Pyörälä, S. & Müller, H. -P. 1994 Effect of abrasion of teat orifice epithelium on development of bovine staphylococcal mastitis. Journal of Dairy Science 77 446–452CrossRefGoogle ScholarPubMed
Persson, K. 1990 Ability of different bacteria to colonize in the teat canal. Seminar on Machine Milking and Mastitis, Aarhus16–23Google Scholar
Rainard, P. & Poutrel, B. 1982 Dynamics of nonclinical bovine intramammary infections with major and minor pathogens. American Journal of Veterinary Research 43 2143–2146Google ScholarPubMed
Rothman, K. J. 1986 Modern Epidemiology. Boston, MA: Little, BrownGoogle Scholar
Smith, D. R. 1991 Veterinary Clinical Epidemiology: a Problem Oriented Approach. Stoneham: Butterworth-HeinemannGoogle Scholar
Zecconi, A., Hamann, J., Bronzo, V. & Ruffo, G. 1992 Machine-induced teat tissue reactions and infection risk in a dairy herd free from contagious mastitis pathogens. Journal of Dairy Research 59 265–271CrossRefGoogle Scholar
Zecconi, A., Piccinini, R., Bronzo, V., Luzzago, C. & Ruffo, G. 1994 a Influence of some herd factors on development of teat canal and intramammary infections. Proceedings, VIIth Congress on Animal Hygiene, Minneapolis, MO 1 CS12–15Google Scholar
Zecconi, A., Vicenzoni, G., Spreafico, G., Piccinini, R. & Ruffo, G. 1994 b Could teat swabs improve Staph. aureus detection? Proceedings, Annual Meeting, National Mastitis Council 33 366–368Google Scholar