Mean extrapulmonary CFU counts in sensitized and non-sensitized rabbits. At necropsy, samples of the spleen, kidney and liver were obtained. The log CFU count/gram of tissue was determined after homogenization and plating dilutions. Sensitized rabbits had greater CFUs in the spleen and liver. Non-sensitized rabbits had approximately half log more CFUs as compared to their sensitized counterparts. P values are based on average CFU counts among both rabbit populations at each extrapulmonary site and compared to other selected areas. Error bars represent standard error of the mean.