Microorganisms are killed or slowed by antimicrobial agents. Bacteria, viruses, protozoans, and fungus such as mould and mildew are examples of microorganisms. An antimicrobial is a substance that kills or inhibits the growth of bacteria. Antimicrobial drugs are classified by the bacteria against which they are most effective. Antibiotics, for example, are used to treat bacteria, whereas antifungals are used to treat fungi. They can also be categorised based on their function. Microbicides are those that kill microorganisms, while bacteriostatic agents are those that simply restrict their growth.
Antibiotics, also called antibacterial, are drugs that kill or slow the growth of germs. They include a variety of potent medications that are used to treat microbial infections. Antibiotics are ineffective against viral infections such as the common cold, flu, and most coughs. Antibiotics are potent drugs that combat infections and, when taken correctly, can save lives. They either prevent bacteria from multiplying or kill them.