BIO 226 Lecture Notes - Lecture 7: Bovine Spongiform Encephalopathy, Pseudomonas Aeruginosa, Thermal Death Time
20 Sep 2016
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Sepsis: microbial contamination: asepsis: absence of microbial contamination. Need to recognize when you have contamination to prevent more spread of contamination. Why you would only pick up one colony in the lab - Lab: prevent contamination of cultures - wear gloves, flaming the loop, keeping cultures covered (minimizing exposure to air: sterilization: complete removal of all microbial life. Not always easy to do - sometimes requires special equipment o. Killing c. botulginum (causes botulism) endospores in food industry. Bacillus: gram (+) rod that forms endospores: disinfection: removal of pathogens usually on an inanimate object, antisepsis: removal of pathogens from living tissue, degerming: removal of microbes from a limited area o. Sanitization: lowers microbial counts on things like eating utensils: biocide/germicide: kills some microbes o. Same way that bacteria grow, they also die (by colonies) Bacteria death: bacteria die at a constant log rate o.
