Staphylococcus 

Exam Cram

• Staphylococcus is a gram +ve cocci- coagulase postive = staph aureus, coagulase negative = all other staph

• Staphylococcus is susceptible to penicillins, particularly flucloxacillin

• Staph aureus resistant to penicillin = MRSA, mx- vancomycin

Staphylococcus 

Gram +ve cocci

Examples

• Coagulase +ve: staph aureus- MSSA or MRSA

• Coagulase -ve

  • Staph epidermidis

  • Staph haemolyticus

  • Staph saprophyticus

Staphylococcus Aureus 

Infections

• Cellulitis

• Bacteremia

• Infective endocarditis

• Abscess

• Cerebral infection post penetrating injury

Classify

• MSSA: methicillin susceptible

• MRSA: methicillin resistant

MRSA management

• Resistant

  • Penicillin: amoxicillin, flucloxacillin, Tazocin

  • Cephalosporins: ceftriaxone, cefalexin, cefuroxime

  • Ciprofloxacin

• Sensitive

  • Vancomycin

  • Nitrofurantoin

  • Doxycycline

  • Teicoplanin

Staphylococcus  Epidermidis

Associated with subcut renal dialysis

Written 2024