HSS 1100 Lecture 4: Lecture 4 - Gram Positive & Negative Cocci

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

Document Summary

Endotoxins produced by gram-negative secondary cell well where lts is released. Some of both positive and negative can produce exotoxins. Colonisation, contamination, pathogenicity, opportunistic, virulence, capsule, pili, toxins (endo/exo) General role of the antigen presenting cell (apc): Exogenous antigens will be presented to mhcii pathway and th2 cells will be activated meaning humoural immunity turned on. Engogenous antigens are presented via mchi pathway and so th1 cells activated meaning cell-mediated immunity turned on. Virulence levels based on how well that can be transferred from person to person. Most common routes for bacteria are inhalation and ingestion. Innate: is already there (cilia, skin dry, acidic) Humoral immunity: antibodies (b-cells & t- helper cells) Cell mediated immunity: (t-helper 1 personal fitness trainers, Iga: secretions, dimer (2 y molecules stuck together) Primary immune response: first time you see antigen. 2 recognize the antigen -> same immune response, but faster. Activate primary immune response: passively, give you a shot.