MMI133 Lecture Notes - Lecture 3: Probiotic, Hospital-Acquired Infection, Phospholipid
5 Dec 2017
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Document Summary
Contains a condensed dna ring called a plasmid. Gram negative bacteria have a thin peptidoglycan layer. Lps contains lipid a which is buried within the cell wall. When bacteria breaks down it is released into the blood and causes a lot of issues. Gram negative bacteria have 2 phospholipid bilayers 1 on the outside then a thin layer of peptidoglycan than another one on the inside. Gram negative is less susceptible to penicillin because of the extra membrane. Gram negative bacteria does not contain teichoic acid. Gram positive bacteria have a thick layer of peptidoglycan. Peptidoglycan: disaccharides and polypeptides forming a 3d mesh. Gram positive bacteria contain teichoic acid and lipoteichoic acid. These molecules increase the stickiness of the bacteria - the stickier the easier it is to adhere and infect other cells. Endospores are bacterial seeds that can lie dormant for a long time and only grow when exposed to a hospitable environment.
