BIS 2C Lecture Notes - Lecture 8: Polysaccharide, Peptidoglycan, Gram Staining
23 Jan 2018
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1/22 source of antibiotic resistance genes for human pathogens. Helpful bacteria in your body (non-pathogenic) that already have anti-biotic resistance. Need anti-biotic resistance if they"re producing antibiotics pathways to antimicrobial resistance. 80% antibiotics produced are used to treat livestock before they get sick so they gain more weight. Solid, soft (tissue in organisms), liquid-air interface (pond surface) Mix of microbes living together eg on top of each other. Diversity of species of microbes too example: plaque on your teeth free living microorganisms bind to surface (irreversible) 1: produce polysaccharide extracellular matrix, grow and replicate and divide, attract more microbes of same species w/ signals (behavior and communication) 6. then different signals attract different species / domains they come and colonize the matrix. Quorum sensing includes both intra and interspecies communication. Bacteria talk to each other using signals to coordinate different behaviors through gene expression. Bacteria can distinguish self from other (signals)
