→ Some microbes are used to prepare drugs.
→ Antibiotics which is produced by the use of microbes, inhibits the growth of pathogens or kill them.
→ This drugs commonly derived from fungi and bacteria.
→ Penicillium notatum (fungi) secrete penicillin antibiotic which inhibits or slow down the growth of staphylococci bacterium.
→ Antibiotics weaken the cell wall of bacteria. Such weak bacteria are destroyed by immune cells that is WBC. → Streptomysin, tetracyclin, penicilin etc. Are common antibiotics.