Microbiology and Immunology 3820A Lecture Notes - Lecture 8: Lymphatic System, Chronic Obstructive Pulmonary Disease, Streptococcus Pyogenes
8 Apr 2018
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Just bc its called aureus doesn"t mean it is actually golden all the time: aureus gram stain. Id by colonial and gram stain morphology: coagulase positive, coagulase tests are so common in laboratories, almost all other staphs are coagulase negative (it means its not staph aureus) Staphylococcus aureus virulence factors: cell wall virulence factors, virulence is the ability to cause disease, protein a which binds to the fc portion of igg and inhibits phagocytosis. They stimulate a massive t- cell response (~ 20%, contrasted with the usual 0. 01%) with outpouring of. T-cell cytokines tnf-(cid:573), )l-2, and interferon-(cid:576): exfoliatin which causes the expanded staphylococcal scalded skin syndromes, enterotoxins a, b, c, d, e, g which cause staphylococcal food poisoning, these are heat stable toxins, toxic shock syndrome toxin (tsst-1) 3: this occurs wherever there is a hair follicle, hair is everywhere except soles, palms, and mucosa.
