PREVALENCE OF SUBCLINICAL MASTITIS IN CATTLE ON THE BASIS OF DIFFERENT MASTITIS DIAGNOSTIC TESTS.

The present study was undertaken to evaluate prevalence of subclinical mastitis on the basis of commonly used mastitis diagnostic tests. A total of 592 functional quarters of 150 apparently healthy lactating cows were screened by modified California mastitis test, somatic cell count, electrical conductivity and milk pH. The animal-wise highest prevalence of SCM was found in somatic cell count (47.33%) followed by electrical conductivity (46%), modified California mastitis test (44.66%) and milk pH (42.67%). The quarter wise highest prevalence of SCM was recorded in somatic cell count (23.98%) followed by electrical conductivity (23.47%), modified California mastitis test (22.80%) and milk pH (21.45%). Right side quarters were found more affected then the left side quarters. Hind quarters were more affected than the fore quarters. Parity wise highest prevalence of SCM in each mastitis detection tests was observed in Vth parity. Whereas, lactation stage wise highest prevalence of subclinical mastitis was found in early lactation stage followed by mid lactation and least in late lactation stage. [ABSTRACT FROM AUTHOR]