Sensitivity, specificity and predictive values of indirect rapid tests for diagnosis of subclinical mastitis
2000
Joshi, H.D. | Joshi, B.R. (Agriculture Research Station, Lumle (Nepal))
A study was conducted during 1999 to identify most suitable rapid field test for the diagnosis of sub clinical mastitis in cows and buffaloes in mid hills of Nepal. A total of 715 teat milk samples from 200 apparently healthy animals, consisting of 16 cows and 184 buffaloes were subjected to screening sub clinical mastitis by Mastrip test, Modified Whiteside Test (MWST) and Sodium Lauryl Sulphate Test (SLST), The sensitivity, specificity and predictive values of these tests were compared with combined standard test consisting of cell count and bacteriological examination. SLST and MWST was found to be superior than Mastrip test. The specificity of MWST. SLST and Mastrip test were found to be 92.3 percent, 91.6 percent and 85.8 percent respectively, whereas, the sensitivity of SLST, MWST and Mastrip test was 92.3 percent, 83.6 percent and 51.5 percent respectively. The predictive values of MWS test and SLS test were of similar type (88.7 percent). Though MWST reagent was easier to prepare than SLST reagent, both SLS and MWS tests were comparable to standard test. Either MWST or SLST could be used for screening sub clinical mastitis in cows and buffaloes under the field conditions of Nepal.
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