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Fig. 2 | BMC Veterinary Research

Fig. 2

From: Measuring antigen-specific responses in Mycobacterium bovis-infected warthogs (Phacochoerus africanus) using the intradermal tuberculin test

Fig. 2

Test value of the skin test for M. bovis infected and uninfected warthogs. Test value was calculated by subtracting the PPDa injection sites’ skin fold thickness from that of the PPDb injection site after 72 h (PPDb - PPDa). Median and interquartile ranges are represented by the horizontal bars. The dotted lines represent the various published cut-off values in other species (1, 2 and 4 mm). *** indicates p < 0.001

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