32. Bacillus Brevis: Topical Infection Protector
This bacterium produces gramicidin, discovered in 1939. The compound disrupts bacterial cell membranes, particularly in gram-positive species. Its toxicity prevents systemic use, but topical applications remain valuable. Pharmaceutical companies often combine it with other antibiotics in eye drops and skin creams. These combinations provide broader coverage against various bacterial types. Gramicidin’s discovery further demonstrated that soil microorganisms could yield powerful antimicrobial compounds.