Host-Defenses Flashcards
innate defense
properties of the normal host
NON-SPECIFIC defenses
adaptive defences
induced by the infection
SPECIFIC to the pathogen aka based on ANTIGENS
bacteriocin
normal microbiome secretes this
complement system
- part of the innate defenses
- set of proteins that creates pores in the pathogen membrane and induces lysis
- activation: antibodies or microbial cell wall component
- no effect on gram positives
inflammation
- general nonspecific response to endotoxins, tissue damage
- allows the recruitment of immune cells to the site of infection
MAC
membrane attack complex
granulocytes
phagocytic, granules in the cytoplam
lymphocytes
B and T cells
phagocytic cells
primarily neutrophils and mactophages
ROS
rapid increase in uptake of O2 produces O2-, hydrogen peroxide, hydroxyl, OCl-
-need V-type ATPases, NADPH oxidase, Myeloperoxidase to get rid of them
vasodilation
increased permeability
diapedesis
passage of white blood cells through the intact walls of the capillaries
C5a
attracts phagocytes
C3a
causes a release of histamine by mast cells
Il1
increase movement of fluid and immune cells to the infection sites