Fig. 7From: Comparison of a mycobacterial phage assay to detect viable Mycobacterium avium subspecies paratuberculosis with standard diagnostic modalities in cattle with naturally infected Johne diseaseA Venn analysis of the Johne animals, comparing phage/qPCR with the three conventional methods. In combination with fecal PCR, 100% of the 32 Johne animals tested MAP positive, with 15 cows positive in both tests (p(kappa)= 0.02) and no cows testing negative by both tests (a). When combined with plasma IFN-γ, there were four cows negative by both tests (p(kappa)  = NS: b). When combined with ELISA there were six cows negative by both tests (p(kappa)  = NS: c)Back to article page