1. Antibiotics are the substances produced in small amounts by certain microbes to inhibit the growth of other microbes to inhibit the growth of other microbes.
They may be anti-fungal (fungistatic or fungicidal) or antibacterial (bacteristatic or bactericidal) in nature.
2. The first antibiotic was discovered by the British physician, Dr. Alexander Fleming in 1929 when he was working with the pathogenic bacterium Staphylococcus aureus.
3. Some common antibiotics and their microbial sources are listed below :
