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Herd-level and territorial-level factors influencing average herd somatic cell count in France in 2005 and 2006

Published online by Cambridge University Press:  12 June 2012

Didier Raboisson ,
Marie Dervillé ,
Nicolas Herman ,
Eric Cahuzac ,
Pierre Sans  and
Gilles Allaire
Didier Raboisson*
Affiliation:
Université de Toulouse, INP, ENVT, 23 chemin des Capelles, BP 87614, F-31076 Toulouse Cedex 3, France Observatoire des programmes communautaires de développement rural, US 0685, INRA Toulouse, chemin de Borde-Rouge, F-31326 Auzeville, France
Marie Dervillé
Affiliation:
Observatoire des programmes communautaires de développement rural, US 0685, INRA Toulouse, chemin de Borde-Rouge, F-31326 Auzeville, France
Nicolas Herman
Affiliation:
Université de Toulouse, INP, ENVT, 23 chemin des Capelles, BP 87614, F-31076 Toulouse Cedex 3, France
Eric Cahuzac
Affiliation:
Observatoire des programmes communautaires de développement rural, US 0685, INRA Toulouse, chemin de Borde-Rouge, F-31326 Auzeville, France
Pierre Sans
Affiliation:
Université de Toulouse, INP, ENVT, 23 chemin des Capelles, BP 87614, F-31076 Toulouse Cedex 3, France
Gilles Allaire
Affiliation:
Observatoire des programmes communautaires de développement rural, US 0685, INRA Toulouse, chemin de Borde-Rouge, F-31326 Auzeville, France
*
*For correspondence; e-mail: [email protected]
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Abstract

Mastitis is a multifactorial disease and the most costly dairy production issue. In spite of extensive literature on udder-health risk factors, effects of metabolic diseases, farmers’ competencies and livestock farming system on somatic cells count (SCC) are sparsely described. Herd-level or territorial-level factors affecting monthly composite milk weighted mean cow SCC (CMSCC) were analysed with a linear mixed effect model. The average CMSCC was 266000 cells/ml. Half of the herds had CMSCC >300000 cells/ml for 2–6 months a year, and 15% of herds for more than 7 months a year. CMSCC was positively associated with the number of cows, having a beef or fattening herd in addition to the dairy herd, the monthly average days in milk, the yearly age at first calving, the yearly proportion of purchased cows and the yearly culling rate. Moreover, a positive association is reported between CMSCC and the monthly proportion of cows probably with subacute ruminal acidosis (fat percentage minus protein percentage ⩽0·30%, for Holstein) and negative energy balance (protein to fat ratio ⩽0·66, for Holstein), the yearly average calving interval, having at least one dead cow and the mean monthly temperature. The association was negative for a predominant breed other than Holstein, the monthly milk production, the yearly dry-off period length, the monthly first calving cow proportion, having an autumn calving peak, being a Good Breeding Practices member, the monthly number of days with rain, the altitude and the territorial cattle density. CMSCC varied widely among the 11 dairy production areas. In conclusion, this study showed the average CMSCC for the French dairy cows, compared with international results. Moreover, it quantified the contribution of several factors to CMSCC, in particular metabolic diseases and the farm environment.

Keywords

Composite weighted SCCherd-level factorsterritorial-level factors
Type
Research Article
Information
Journal of Dairy Research , Volume 79 , Issue 3 , August 2012 , pp. 324 - 332
Copyright
Copyright © Proprietors of Journal of Dairy Research 2012

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