Staphylococcus Aureus

morphology
1. bunch of grapes
2. aureus colonies-golden colour
3. blood agar-B hemolytic
Characteristic
1. large, round, opaque
2. facultative anaerobe
3. many virulence fc
4. withstand H.salt, extreme pH, H temp
5. catalase +
6. coagulase +
Virulence fc
1. enzyme
  1. coagulase
  2. hyaluronidase
  3. stayphylokinase
  4. DNase
  5. lipases
  6. penicillinase
2. toxins
  1. hemolysin
  2. leukocidin
  3. enterotoxin
  4. exfoliative toxin
  5. TSS
Epidemiology
1. readily isolated fomite
2. carriage-anterior nares, skin, nasopharynx, intestine
3. increase in MRSA community
4. predisposition-immunocompromised, poor hygiene, tissue injury
Diseases
1. localised
  1. foliculitis
  2. furuncle
  3. carbuncle
  4. impetigo
2. systemic
  1. osteomyelitis
  2. bacteremia
3. toxigenic
  1. food intoxication
  2. SSSS
  3. TSS
Treatment
1. vancomysin
2. abscess-surgery
3. clindamysin

Resource summary

	Created by adam94 over 11 years ago