FIG. 1.
Only rough colonies form spreading pellicles in TSB liquid medium. (A) M. chubuense. (B) M. gilvum. (C) M. obuense. (D) M. parafortuitum. (E) M. vaccae. (F) M. marinum. On the left are shown smooth and rough colonies grown on TSA plates. The colonies shown are representative of hundreds of colonies obtained throughout the study. On the right, the growth on TSB medium of an isolated colony taken from TSA is shown. For rough variants, the formation of spreading pellicles was observed in glass tubes. The size of the scale bars is 2 mm.