Staphlococcus Summary Flashcards
Cell wall components
Peptidoglycans
Hydrolyze by lysozyme Endotoxin like property Macrophage Cytokines Component cascade
Cell wall components
Protein A
IgG 1,2&4
Reduced C3B
Reduced opsonization
Reduced phagocytosis
Cell wall components
Teichoic acid
Ribitol phosphate
Mucosa receptors
Septic shock
Virulence Factors
Cytolysis or hemolysis
Affected RBC and Leukocytes
Virulence Factors
Alpha
Severe tissue damage
Septic shock
Damage RBC, Platelets and macrophage
Virulence Factors
Beta
Sphingomyelin
Lysophospatidyl choline
Virulence Factors
Delta
Less toxic than alpha and beta
Virulence Factors
Gamma
PVL related
Cell lysis
Invasiveness
Inhibit phagocytosis
Virulence Factors
Exfoliative toxin
Group 2 SSSS Ritter disease Bullous impetigo Basta stratum granulosum ang affected
Virulence Factors
Toxic shock syndrome toxin 1
TSST 1 Exotocin C Entertoxin F Super antigen Basta endothelial cells and chromosome
Virulence Factors
Entero toxins A-E and G-J
Group 3 Super antigen din Peristalsis Food poisoning (ABD) TSS (BDGI)
Enzymes
Coagulase
Aureus CoNs Marker for virulence Fibrinogen to fibrin Clumping factor
Enzymes
Catalase
All staph
Hydrogen to water and oxygen
Enzymes
Penicillinase
Plasmid
Beta lactam ring
Enzymes
Hyaluronidase
Spread of organism
Intracellular ground
Enzymes
Slime productions
Some Cons
PolysacchRide adherent
Inhibit chemotaxis and phagocytosis
Epidemiology
Normal skin - epidermidis
Transient skin - aureus
Colonization - aureus
Neonates
Umbilicus
Skin
Perineum
Older children
Anterior nasopharynx
Clinical syndrome associated with S. Aureus
SSSS
Culture
4+ nasopharynx
1+ skin and blood
Clinical syndrome associated with S. Aureus
TSS
Menstruating women using tampons
Multiple organ system involvement
4+ vagina
1+ blood and skin
Clinical syndrome associated with S. Aureus
Food poisoning
4-24 hours
Culture 4+ food and 1+ feces
Clinical syndrome associated with cons
Artificial valves
Shunt infections
Prosthetic joints
UTI sexually active women ( Saprophyticus)
Treatment
Beta lactamase production
Oxacillin
Cloxacillin
Nafcillin
Methicillin
If methicillin resistant due to PBP alteration
Vancomycin
Teicoplanin
Cell wall components
Capsule
Polysaccharides
Inhibit phagocytosis