Demonstrating to dairy farmers the impact of mastitis on reproduction

K. Taylor; M.A. Bryan

Demonstrating to dairy farmers the impact of mastitis on reproduction

于Mastitis control

著者：

K. Taylor

K. Taylor VetSouth Ltd, P.O. Box 12, Winton, Southland, New Zealand Corresponding author: markb@vetsouth.co.nz

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and

M.A. Bryan

M.A. Bryan VetSouth Ltd, P.O. Box 12, Winton, Southland, New Zealand Corresponding author: markb@vetsouth.co.nz

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类型:: 章节

Page Range:: 407–414

DOI:: https://doi.org/10.3920/9789086866496_095

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This retrospective study of reproductive performance in dairy herds in Southland, New Zealand, modelled the effect of Age, Farm, high Individual Somatic Cell Count (ISCC) over the mating period (HOM), high ISCC at any time in lactation (HIL), and chronic intra-mammary infection over two seasons, on the ability of cows to get in calf within the seasonal time frame (PregSTF) required in a predominantly pasture based farming system. Data from 7 herds with an average herd size of 509 cows enabled 3,568 cow records to be analysed. Hypothesised risk factors for reproductive performance were screened at a univariate level before inclusion in a final model. Chronic elevation of ISCC over two lactations (CM), and HOM did not result in significantly reduced %PregSTF. The variables Age (grouped), Farm, HOM, HIL; along with interaction terms Farm*HOM and Farm*HIL were used in a final multinomial logistic regression model. The risk factors HIL and Farm remained in the final model. Cows with no ISCC over 250,000 cells/ml in the whole lactation were 1.24 (LCI 1.053; UCI 1.461, P=0.010) times more likely to be in calf in the seasonal time frame.

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Mastitis control

From science to practice

ISBN:: 9789086866496

出版社:: Wageningen Academic

印刷出版日期:: 30 Oct 2008

Subjects
- Life Sciences

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Demonstrating to dairy farmers the impact of mastitis on reproduction

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Mastitis control

From science to practice

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