Effect of Mastitis on Milk Yield, Peak Yield and Lactation Length in Friesian Dairy Cows in Sudan

This paper had been presented for promotion at the university of Khartoum. To get the full text please contact the other at Ibtisammohamed@hotmail.comThe present study was carried out to estimate the effect of mastitis on the production performance of Friesian dairy cows in Butana Dairy Farm (Sudan). Mean, maximum and minimum levels of total milk yield, yield on 305 days, lactation length and peak yield for healthy and mastitis-infected cows in the first three lactations were evaluated. Mastitis infection decreased the amount of milk produced by infected cows compared to healthy ones. The mean and maximum lactation lengths for healthy and infected cows were longer than the standard lactation lengths (