Estimation of Milk Yield Losses From Subclinical Mastitis in Dairy Cows

Authors : Cengiz YALÇIN, Yavuz CEVGER, Kenan TÜRKYILMAZ, Gül UYSAL

Pages : 599-604

View : 24 | Download : 11

Publication Date : 0000-00-00

Article Type : Research Paper

Abstract :Multiple regression analysis was utililised to estimate the relationship between somatic cell counts insert ignore into journalissuearticles values(SCC); and milk yield using the data of 1687 quarter milk samples collected weekly from 20 cows at the Dairy Unit of A.U. Veterinary Faculty`s Research Farm between May and October 1998. The findings of this study supported the results of similar previous studies on that there is a negative relationship between SCC and milk yield, the relationship between milk yield and lnSCC insert ignore into journalissuearticles values(natural logarithmic form); is not linear. It was found that milk yield loss from SCC vary considerably according to the level of SCC. The milk yield losses were estimated to be 0.6 kg/day/cow insert ignore into journalissuearticles values(2.1%); where the SCC was 403,000 cells/ml, whereas these losses where the SCC were 1,097,000 and 1,900,000 cells/ml were estimated to be 3.8 kg/day/cow insert ignore into journalissuearticles values(14.1%); and 6.8 kg/day/cow insert ignore into journalissuearticles values(23.2%); respectively. The weighted average milk yield loss was estimated to be 1.53 kg/day/cow.
Keywords : Cow, subclinic mastitis, somatic cell counts, milk yield loss