The efect of clinical mastitis infection on productive and reproductive traits in Holstein-Friesian cows under Egyptian conditions
1999
Kishk, W.H. | Awad, M.M. | Osman, A.A | Amin, A.A. (Suez Canal Univ., Ismailia (Egypt)) | El-Gohary, A.
The relationship between NMI number of mastitis infections and some productive and reproductive traits was studied. These traits were daily milk yield (DY), lactation period (LP), days open (DO) and number of services per conception (NOS). Data of this experiment were divided into two groups. The first group included cows with clinical mastitis infection during different lactating seasons and the second included non-infected cows. Results of this experiment showed that mastitis infection had deleterious effects on both productive and reproductive traits. DY of the second group was higher by 54.7 % than in the first. NOS of the second group was lower than that of the first. There were negative correlations between mastitis infection and productive traits especially with DY (-0.39). It could be concluded that mastitis infection had a correlation with bad conditions of housing systems and high milk production of cows.
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