HSS 1100 Lecture Notes - Lecture 4: Staphylococcus Epidermidis, Cell-Mediated Immunity, Lancefield Grouping

• School: University of Ottawa
• Department: Health Sciences
• Course: HSS 1100
• Professor: Franco Pagotto

Document Summary

Hss 1100 lecture 4 (tuesday, january 24th, 2017) *gram neg make endo toxins (have 2 cell walls) Bacteriophages viruses that can infect and destroy bacteria. Staphylococcus aureus ( staphule = grape: formation that looks like grapes, problem because it produces a variety of exotoxins. But they are also superantigens which means they are able to turn on all the immune cells which causes a lot of problems (ex. Exfoliative toxins makes skin come off (eta, etb) Toxic shock syndrome toxin 1 used to be exotoxin c and enterotoxin f: also produce enzumes. Coagulase (coagulation of fibrin for clotting cascade) Made by almost all pathogenic staphylococci; staphylococci that are not pathogenic do not make coagulase. Used in lab test to differentiate b/w s epidermidis, s capitis, and s saprophyticus. Therefore employing one of the mechanisms of antibiotic resistance: many strains found in normal population, carried in nose, axilla, throat, perineum, and hands, problem because .