In the past, man grew fungus and found out that it produced a substance that killed other disease - producing germs. It is the science about the production of Penicillin from the fungus, Penicillium notatum. But in the remote past millions of years ago wasps had found this fact and used this technique in protecting their developing offspring, the larvae! Yes, the Beewolf wasps (Philanthus crabroniformis) produce a cocktail of antibacterial substances from Streptomyces since ages.
