Wound infections

Question 1

Common pathogens in:

1. Pustular skin lesions
2. Exfoliative lesions
3. Surgical wounds
4. Intra-abd sepsis
5. Gas gangrene
6. Necrotizing infections
7. Animal bite wounds

Answer 1

1. Staphylococus aureus
2. S. aureus, Strep. pyogenes
3. S. aureus
4. Anareobes/gut flora
5. Clostridium perfringens
6. S. pyogenes; mixed aerobes & anaerobes
7. Anareobes

Question 2

Special considerations in specimen collection

Answer 2

• Deep as possible in lesion
• Use transport medium
• Suspected viral, fungal or protozoan lesion infections need special methods

Question 3

A gram film may be useful for revealing predominent pathogen

e.g. staphyloccoal wounds present with…

Answer 3

Characteristics gram +ve cocci

Question 4

Antimicrobial treatment for:

1. S. aureus
2. S.pyogenes
3. Enterobacteria
4. P. aeruginosa
5. Anaerobes

Answer 4

1. Flucloxacillin, erythromycin
2. Benzylpenicillin, erythromycin
3. Ampicillin, aomxicillin, gentamicin
4. Azlocillin, gentamicin
5. Metronidazole, Clindamycin

Question 5

Special considerations in S. aureus treatmenA

Answer 5

May be resistant to flucloxacillin = Meticillins RSA

MRSA

Use Vancomycin in MRSA