Classification of pathogenic bacteria - Gram positive Flashcards Preview

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Flashcards in Classification of pathogenic bacteria - Gram positive Deck (16):
1

Cocci

Staphylococci and streptococci

2

Staphylococci

Clusters

3

Streptococci

Chains

4

Coagulase test positive

Staphylococcus aureus - MSSA MRSA

5

Coagulase test negative

Skin commensals which can be pathogenic in contact with foreign body/ prostheses

6

Staphylococcus Aureus

Commensal carried in nose
Septicaemia, boils
Penicillin resistant ( beta lactamase production)

7

Alpha haemolytic

Partial haemolysis
Blood agar green
Streptococcus pneumonia
Veridans streptococci - oral flora cause endocarditis

8

Beta haemolytic

Groups A-G identified using Lancefield grouping but A,B + D most scientifically important
Tur blood agar clear and are completely haemolytic

9

Group A

Streptococcus pyogenes - necrotising fasciitis and cellulitis

10

Group B

Streptococcus agalactiae - neonatal sepsis, genital tract carriage

11

Group D

Enterococci and are non haemolytic - UTI

12

Clostridium difficile

- Increased risk with antibiotic use and spreads through spores
- detected using antigen detection in stool with ELISA
- pseudomembranous collitis

13

Clostridium perfingens

Found in soil and responsible for gas gangrene

14

Clostridium tetani

Toxins cause tetanus

15

Clostridium botulinum

Botox

16

Bacilus Anthracis

Cause anthrax