Recovery of Pseudomonas aeruginosa colonial dissociants on a protease detection medium.

Dialyzed brain heart infusion-skim milk agar medium facilitated the recovery of colonial dissociants of Pseudomonas aeruginosa. Differences in colonial morphology as well as in proteolytic activity were readily visualized, thus permitting facile isolation of segregating colony types for further biochemical, serological, and susceptibility studies.