The association between subclinical mastitis around calving and reproductive performance in grazing dairy cows

•The aim of the study was to evaluate the effect of subclinical mastitis around calving on some indices of reproductive performance in grazing dairy cows.•Staphylococcus aureus, coagulase negative staphylococci, and Streptococcus uberis were the most frequent isolated pathogens.•Subclinical mastitis...

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Bibliographic Details
Published in:Animal reproduction science 2017-10, Vol.185, p.109-117
Main Authors: Villa-Arcila, N.A., Sanchez, J., Ratto, M.H., Rodriguez-Lecompte, J.C., Duque-Madrid, P.C., Sanchez-Arias, S., Ceballos-Marquez, A.
Format: Article
Language:English
Subjects:
Animal Husbandry
Animals
Bacterial Infections - veterinary
Calving-to-conception interval
Cattle
Female
Intramammary infection
Mastitis, Bovine - etiology
Milk - microbiology
Postpartum Period
Pregnancy
Reproduction
Reproductive index
Risk Factors
Survival analysis
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Summary:•The aim of the study was to evaluate the effect of subclinical mastitis around calving on some indices of reproductive performance in grazing dairy cows.•Staphylococcus aureus, coagulase negative staphylococci, and Streptococcus uberis were the most frequent isolated pathogens.•Subclinical mastitis around calving was not associated with CFS interval, but the CC interval was longer in cows with subclinical mastitis. The objective of this study was to evaluate the effect of subclinical mastitis (SCM) on calving-to-first-service interval (CFS), calving-to-conception interval (CC), and on the number of services per conception (S/C) in grazing Holstein and Normande cows. Primiparous (n=43) and multiparous (n=165) cows were selected from five dairy herds. Two composite milk samples were aseptically collected from each cow at drying-off, and then every week during the first postpartum month. One sample was used for somatic cell count (SCC), and the other one for bacteriological analysis. Cows were followed up to 300 d after calving. Non-parametric and parametric survival models, and negative binomial regression were used to assess the association between SCM, evaluated by SCC and milk culture, and reproductive indices. Staphylococcus aureus, CNS, and Streptococcus uberis were the most frequent isolated pathogens. Subclinical mastitis in the first month of lactation was not associated with CFS; however, the CC interval was longer in cows with SCM compared to healthy cows, the former also had a higher number of S/C.
ISSN:0378-4320
1873-2232
DOI:10.1016/j.anireprosci.2017.08.010