Studies on Subclinical Mastitis in Sirohi Goats in Southern Rajasthan with Reference to Prevalence and Diagnostic Aspects

Mastitis is an economically important disease in goats. In the present study, a total of 100 quarter milk samples were collected from 50  apparently healthy Sirohi Goats in Udaipur district. The culture examination of these samples revealed the prevalence of subclinical  mastitis in Sirohi goats as 26 (26/100) % and 34 (17/50) % on udder quarter basis and animal basis, respectively. The highest prevalence  of subclinical mastitis was observed in 3rd lactation (50 %). Among the different isolates, staphylococci were found as most prevalent  organism accounting for 37.50 (12/32) %, followed by streptococci 28.12 (9/32) %, E. coli 18.75 (6/32) %, bacilli 9.37 (3/32) % and  Corynebacterium spp. 6.25 (2/32) %. The threshold values of modified California mastitis test, total somatic cell count and electrical  conductivity in subclinical mastitic milk samples were observed to be +1, 1.0 million cells/ml of milk and 6.0 mS/cm, respectively.