FIG. 1.

CMI responses following experimental infection of deer with different doses of the bovine or ovine strain of M. avium subsp. paratuberculosis. All data represent mean (+ standard error of the mean) responses for n = 16 or 17 deer/group. Asterisks indicate statistically significant differences observed in animals infected with the high dose (⧫) or low dose (□) of the bovine strain of M. avium subsp. paratuberculosis versus sentinel control animals (▴) (panels A and B) or to statistically significant differences observed between animals infected with the medium dose of the bovine strain (•) and the medium dose of the ovine strain (○) (panels C and D). *, P < 0.05; **, P < 0.01.