Gram positive cocci Flashcards
1
Q
Staphylococcus aureus
Attack
- lungs
- CVS
- CNS = Bacteraemia = sepsiaemia
- bones
A
Morphology
- Catalase pos
- Anaerobic
- caugulase pos
- non-spore forming
Virulence
- protein A; binds to IgG preventing opsonization and preventing phagocytosis
- Hemolysis
- penicillinase
- hyaluronidase: breaks down connective tissue
Clinically
- Gastroenteritis ( food poisoning )
- Toxic shock syndrome
- Pneumonia
- meningitis
- bacteraemia
- osteomyeitis
- skin infection
- urinary infection
Treatment
*resistant to penecillin
Treat with vancomycin
*Clindamycin
2
Q
Staphylococcus epidermidis
Nosocomial infection
A
Metabolism
- catalase pos
- anaerobic
- coagulase neg
Virulence
- Polysaccharide: Adhere to prosthetic devices
- resistant to antibodies
Clinical
- Prosthetic joints
- Prosthetic heart valves
- Urinary tract infection
Treatment
vancomycin
3
Q
Staphylococcus saprophyticus
A
Metabolism
coagulase-positive
faculatative anaerobe
coagulase neg
Clinical
*urinary infection in sexually active females
Treatment
Penicillin