Lecture 8 - Streptococcus Pyogenes Flashcards Preview

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Flashcards in Lecture 8 - Streptococcus Pyogenes Deck (18):
1

Streptococci

G+ coccus which grows in chains

2

3 groups of strep

Alpha-hemolutic, beta-hem, gama-hem

3

Alpha-hemolytic causes...

Endocarditis, tooth decay from dairy foods. Oral pathogen

4

Beta-Hemolytic includes...

Groups A, B, C. Clearing of RBC

5

Gama-Hemolytic includes...

Group D, N. Partial clearing of RBC

6

In what species does strep pyogenes occur?

Only in humans

7

Symptoms of strep p.

Often asymptomatic

8

What is the important VF in strep p.

M Protein - binds "factor h" which protects cells from decomposition

9

What are the two types of hemolysis in strep p.

O - is sensitive to oxygen, S - makes beta-hemolysis

10

Where and who does pharyngitis occur?

Children/Teens and in the throat

11

How is strep throat diagnosed

Rapid strep test, if negative then a throat culture is run

12

How is strep throat treated?

Antibiotics: B-lactams (no resistance) and erythromycin (resistance)

13

Symptoms of scarlet fever

High fever, strawberry tongue, rash and red bumps

14

When/why does rheumatic fever occur

Post infection from scarlet or strep throat about 2-3 weeks later. Can cause heart valve damage

15

Invasive strep in soft tissue is called

Necrotizing Fascitis

16

Invasive strep in muscles is called

Necrotizing myositis

17

Strep TSS is also known as

Flesh Eating Disease

18

What unique feature is required for infection of strep

Human MHC class II