What are Antibiotics?

These are referred as secretions released by small organisms which inhibit or destroy the pathogens without affecting the host. Penicillin was the first antibiotic to get discovered. It was Fleming who discovered it in the year 1929. Actinomycetes are the organisms which provide maximum number of antibiotics. Streptomycin, terramycin, choloromycetin and tetracycline are other important antibiotics.