BIOS10115 Lecture Notes - Lecture 9: Chemotherapy, Povidone-Iodine, Purell
3 Dec 2016
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Factors that affect microbial growth (continued: osmotic pressure. High concentrations of salt, sugar and other substances. Examples: jams, jelly, syrup, cured meat: chemical agents (disinfectants and antiseptics) Bacteriostatic temporary denaturation: some treatments that cause denaturation. Trichlorosan (microban) in every soap that says anti-bacterial: other agents (cont. ) Ethyl or isopropyl (rubbing alcohol) mixed with water (70%) Most germs don"t wash away with simple water because most of the stuff that contaminates our skin is like oil, it doesn"t like water. Like soaps and detergents that coat dirt and bacterial particles so that they like water and can be easily washed away: antibiotics some definitions. Any chemical substance used in medical drugs . Chemotherapeutic agent used to treat diseases caused by a microbe: i. e. A chemical substance made by microorganisms to kill or inhibit bacteria. History of antibiotics: 3000 years ago. Ancient egyptians, chinese, central american indians all used molds to treat wounds and rashes: late 1800s.
