Year: 2017 | Month: October | Volume 7 | Issue 5
Influence of Mastitis Type on Reproductive Performance of Karan Fries Cows During Early Lactation
Abstract:
The present study was designed to evaluate the influence of mastitis type (clinical and subclinical) on reproductive performance of crossbred cows. 50 pregnant Karan Fries (KF) cows were screened from NDRI cattle yard. Based on milk somatic cell count (SCC) and modified Californian Mastitis Test (mCMT) cows were grouped in to three groups [Healthy, Sub-clinical mastitis (SCM) occurring within 1 week of calving and SCM occurring between 7th to 8th week of calving]. Five of the selected SCM cows showed systemic signs of clinical mastitis (CM) in their later life, so formed a separate group. Blood samples were collected from these cows from day calving at weekly interval till +90th days post-calving for plasma progesterone profiling. The animals were kept under observation to find out number of days to first artificial infection (AI), inter estrus interval, services per conception, day’s open and calving interval. All these parameters were unaffected in cows with SCM occurring at any time during early lactation. Cows with CM after first AI had increased services per conception, increased days open and prolonged calving interval. In brief, this study shows SCM had a less pronounced effect on reproductive performances of KF cows than CM. Therefore, reduction of CM incidence during early lactation can improve the reproductive performance of crossbred cows and ultimately give economic benefit to the cattle owner.
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