Strep
Terms
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- How do we differentiate Sterp from Staph in the lab
- Catalase Neg
- On Blood Agar what three results can you get
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Alpha - partial hemolysis green
Beta - clear colonies
Gamma - no hemolosys - What Strep are Alpha Hemolytic
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S Pneumo - + Quellung Optochin Sens.
S Viridans - No Capsule - Optochin Resis. - What Strep are Beta Hemolytic
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GAS - Bacitracin Sens
GBS - Bacitracin Res - What are gamma Hemolytic
- Enterococcus
- What are Lancefield antigens
- Classification of the C antigen of Carb in the cell wall
- What dz does GAS cause (6)
- Pharyngitis, cellulitis, Scarlet Fever, Strep TSS, RF, PSGN
- Antigenic Markers fo GAS
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C Carb
M Protein - Antigenic, Protect from complement, Phago, site of antibody opsonization - GAS Enzymes (4)
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Streptolysin O
Streptolysin S - O2 Sens.
Pyrogenic Exotoxin - Scarlet fever
Others - Steptokinas DNAse Hyalurinidase - Sptreptolysin O (4)
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O2 Labile
Causes Beta Hemolysis
Antigenic
Anti-ASO antibodies Dx - Pharyngitis Features (4)
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Erythematous Tonsils
Purulent Exudate
Temp
LN - Skin INfections of GAS (4)
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Folliculitis
Cellulitis
Impetigo
Necrotizing Fascitis -
Sx - Redness, swelling, warmth, and pain of Skin
Si - Inflammation of the connective tissue underlying the skin
Hx - cut - Celulitis
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Fever Pain Sweling over area
Swelling, Bronzing, Hemorrhagiv Bulla
Necrosis in Dermis and Subcut fat - Necrotizing Fasciitis
- Rheumatic Fever (5)
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Chorea
Myocariditis
Rash
Nodules
Polyarthiris