MICR-3050 Study Guide - Quiz Guide: Wiping, Microorganism, Agar Diffusion Test
8 Apr 2018
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Chapter 5. 15 5. 17: define the frequently used terms of microbial growth control. The complete destruction of viruses, bacteria and bacterial endospores. Wiping down an inanimate object to clear off some microbial load. Reduction of microbial load to levels deemed safe. Prevention of infection in living tissue: describe the following physical methods to control the growth of microorganisms: moist heat, dry heat, low temperature, uv radiation, ionizing radiation, and filtration. Types of moist heat include autoclaving, pasteurization and boiling. Pasteurization involves raising the temperature of a liquid to just below boiling. This process does not sterilize but rather reduces the microbial load of the liquid. Boiling does not kill endospores but reduces the microbial load. This method is less effective than moist heat and requires longer exposure times. Freezing stops microbial growth by disrupting the membrane crystal composition. Uv radiation. disinfect the surface but does not have much penetrating power.
