Bacillus sp.

Streptomycetes and related genera are not the only bacteria producing clinicaly useful antibiotics. Some species from genus Bacillus produce, for example:

Colistin (polymyxin E) (Bacillus polymyxa var. colistinus). It is one of the last-resort antibiotics for multidrug-resistant Pseudomonas aeruginosa and Acinetobacter. New Delhi metallo-ß-Lactamase multidrug-resistant Enterobacteriaceae have also shown susceptibility to colistin.

Bacitracin (Bacillus subtilis var. Tracy): a common ingredient of eye and skin antibiotic preparations (in the United States, the popular brand name Neosporin: bacitracin along with neomycin and polymyxin B (derived from Bacillus polymyxa).