Flashcards
Streptococcus Pyogenes
Flashcards do conjunto (17)
- 1Growth on Blood Agar plateVaries Depending on strain
- 2Beta Haemolytic Strep. CharacteristicsComplete haemolysis- celar area around colony
- 3Alpha Haemolytic StrepPartial Haemolysis- greenish tinge around colony
- 4Gamma StrepNo haemolysis
- 5Lancefield Classification of StrepBased of cell wall polypeptides (identified using Ab's)
- 6Lancefield ClassificationsA-H & K-U (The corresponding Ag's cause agglutination
- 7Mild S. Pyogenes IngectionsImpetigo
- 8Serious S.Pyogenes InfectionsCellulitis, Necratising Fasciitis
- 9Eipdemiology- SourceUsually exogenous (or unknown)
- 10Eipdemiology- Mode of TransmissionContact/Resp. droplets
- 11Eipdemiology- Host ImmunityM-Protein Antigen confers some protection
- 12Eipdemiology- Adhesion FactorsSurface F. Proteins, Lipoteichoic Acid
- 13Eipdemiology- Immune Evasion (M-Protein)Binds to host proteins, destabilising compliment and deactivating neutrophils
- 14Eipdemiology- Immune Evasion (Variance)M-Protein structure is varied in to help evade the immune system
- 15Eipdemiology- Immune Evasion (Capsule)Provides low immunogenicity
- 16Eipdemiology- Immune Evasion (Streptokinase)Facilitates spread of bacteria
- 17Eipdemiology- ExotoxinsSPE A, B & C (A&C are superantigens) with all be pyogenic
Informações
- Descrição
- Medical Microbiology (Skin Infections) FlashCards sobre Streptococcus Pyogenes, criado por gina_evans0312 em 08-02-2014.
- Criado por
- gina_evans0312
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