Vol. 9, Issue 8, Part K (2025)

The present study was conducted on 472 quarter milk samples from 120 apparently healthy lactating cows to determine the quarter, parity and lactation stage-wise prevalence of sub-clinical mastitis in cattle based on the modified California mastitis test (MCMT). The animal and overall quarter-wise prevalence of subclinical mastitis were 37.16 percent and 22.03 percent, respectively. The quarter type-wise highest prevalence of SCM was found in right hind quarters (32.76%), followed by left hind quarters (23.52%), right fore quarters (19.65%) and least prevalence was recorded in left fore quarters (12.50%). The parity-wise highest prevalence of SCM was noticed in IV^th parity followed by III^rd, V^th, VI^th, VII^th and above, IInd and least in I^st parity. Whereas, lactation stage-wise, the highest prevalence of SCM was recorded in early lactating stage 25 (43.86%) followed by mid-lactating stage 17(36.20%) and least in late lactating stage 03 (18.75%) by modified California mastitis test.