An in-house PPA-ELISA was compared to a commercial ELISA using a panel of 108 serum samples. In relation to commercial test, in-house assay presented 100% of sensitivity and 83.5% of specificity and a high concordance (kappa> 0.5), which demonstrates that the in-house assay is a valuable tool for use in developing countries.
Cattle; Mycobacterium avium subsp. paratuberculosis; serology