PREVALENCE OF SUBCLIMICAL MASTITIS IN SMALL SCALE DAIRY FARM AT MUKTAGACHA, MYMENSINGH

Abstract

Mastitis is one of the most common production disease found all over the world. The study was aimed to investigate the prevalence of subclinical mastitis at Muktagacha, Mymensingh , during the period of 12 October 2019 to 12 December 2020. Total of 60 lactating cows were examined to collect subclinical mastitis related information by using a formal questionnaire. Subclinical mastitis was diagnosed on the basis of clinical examinations and confirmed by California Mastitis Test. The prevalence of mastitis was 36.7% (22) in the studied area. Among 22 positive cases 23.3% (14) were affected with mild, 11.7% (7) with moderate and 1.7% (1) were severely affected. The prevalence of mastitis in Sahiwal cross, Friesian cross, Local Zebu were 32.0%, 50.0% and 26.7%, respectively. The prevalence of mastitis in 3-4, 5-6, 7-8 years old cows were 33.3%, 36.8%, and 40.0% subsequent. The occurrence of subclinical mastitis in the cows of parity 1st - 2nd, 3rd - 4th and 5th - above was and 28.6%, 35.0% and 58.3% respectively. The cow yield 1-5 liter of milk found more prone to subclinical mastitis. Among the different quarters of the cows, left rear quarter was found more susceptible to subclinical mastitis.