Prevalence of subclinical mastitis and measure of supplementing vitamin E and selenium (Se) for prevention of mastitis in dairy cows in Ho Chi Minh City

Abstract

A total of 9,984 milk samples from 831 household dairy cow farms in 4 districts: Cu Chi, Hoc Mon, Binh Chanh and District 12 (Ho Chi Minh City) were collected for analysing the somatic cells (SCC) in milk. The studied results showed that the rate of milk samples containing more than 200,000 SCCs/ml milk was 85.28%, of which, 3.48% of milk sample presented > 1.5 million SCCs/ml milk. This indicated that the dairy cow of the 4 above districts in Ho Chi Minh City faced with high risk of mastitis. The experiment on supplementing vitamin E and selenium in feed for the dairy cows feeding in 2.5 months (with 2.3 ppm Se and 130 UI vitamin E per day per each milking cow) was carried out. As a result, the number of the somatic cells in milk
reduced from 45.3% to 48.7% at DDEF and household farms respectively (P < 0.05) in 4 above districts, Ho Chi Minh City.