Term
| List a few characteristics of the Streptococcus species |
|
Definition
- GPC often in chains
- Facultative organisms
- Catalase negative
|
|
|
Term
Characteristics of Streptococcus pyogenes
|
|
Definition
Natural host/reservoir: throat or skin Mode of transmission: direct contact/resp droplet Clinical manifestations: various Risk factors: ??? Characteristics: - beta-hemolytic
- bacitracin sensitive
- Lacefield Group A
|
|
|
Term
| Characteristics of Streptococcus agalactiae |
|
Definition
Natural host/reservoir: GI tract, vagina Mode of transmission: during birth Clinical manifestations: neonatal sepsis, mennigitis Risk factors: diabetes, difficulty labor Characteristics: - beta-hemolytic
- bacitracin resistant
- hippurate positive
- Lancefield Group B
|
|
|
Term
| Characteristics of Streptococcus pneumoniae |
|
Definition
Natural host/reservoir: Oropharynx Mode of transmission: respiratory droplet or contact Clinical manif: SOB/fatigue/cough/fever/chills Risk factors: elderly, alcoholisms, chronic resp dx Characteristics: - alpha hemolytic
- optochin sensitive
|
|
|
Term
| Characteristics of Streptococcus viridans |
|
Definition
Natural host/reservoir: oral cavity Mode of transmission: direct contact Clinical manifestations: dental carries/endocarditis Risk factors: recent dental work Characteristis: - alpha hemolytic
- optochin resistant
- bile-esculin sensitive
|
|
|
Term
|
Definition
| complete lysis resulting in clearing of blood cells surrounding colony |
|
|
Term
|
Definition
| partial hemolysis resulting in green discoloration of blood cells surrounding colony |
|
|
Term
|
Definition
| non-hemolytic resulting in visible blood cells around surrounding colony |
|
|
Term
|
Definition
Immune mediated diseases: you get an infection that causes a disease, causes another condition b/c of the way you fight the initial disesae Examples: rheumatic fever, acute glomerulonephritis |
|
|
Term
|
Definition
Sx: fever after having strep throat Et: antibodies targeting Streptococcus pyogenes antigens begin to cross react with heart tissue Txt: Long term penicillin use |
|
|
Term
|
Definition
Sx: oligouria, dark/smoky urine, edema Et: Antigen-antibody complexes get deposited in the glomerular basement membrane *usually occurs after a skin infection |
|
|
Term
| Virulence factors of S. pyogenes |
|
Definition
- erythogenic toxin
- exotoxin A
- exotoxin B
|
|
|
Term
|
Definition
Virulence factor of S. pyogenes causes rash of scarlet fever sometimes accompanies strep throat infections |
|
|
Term
|
Definition
virulence factor of S. pyogenes considered a "super antigen" causes toxic shock syndrome |
|
|
Term
|
Definition
virulence factor of S. pyogenes "flesh eating bacteria" protease of necrotizing fasciitis |
|
|
Term
|
Definition
Normal Flora of the mouth Can cause endocarditis during trauma |
|
|
Term
|
Definition
Normal flora of the GI Can cause pseudomembranous colitis |
|
|
Term
|
Definition
exotoxin mediated manifestation of S. pyogenes infection cause by exotoxin A |
|
|
