Comparative efficacy of indirect tests in diagnosis of bovine sub clinical mastitis

摘要

The present study was conducted on total 614 quarter milk samples collected from 162 apparently healthy lactating cows to determine the comparative efficacy of California mastitis test (CMT) and White side test (WST) in the detection of Subclinical mastitis (SCM) in dairy cows taking somatic cell count (SCC) as standard test. On comparison with SCC, the sensitivity of CMT and WST were 90.63 and 86.72 %, respectively. CMT revealed 93.83% specificity as compared to 89.50% of WST. The percent positive and negative predictive values for CMT were calculated to be 79.45 and 97.43%, respectively, while for WST these were 68.52 and 96.24%, respectively. The overall agreement of CMT (93.16%) was found to be higher than that of WST (88.92%).