Wound, Bone & Joint Infections

Question 1

Most common cause of surgical site infection?

Answer 1

S. aureus (MRSA, MSSA) > E. Coli > Pseudomonas aeruginosa

Question 2

Most common cause of osteomyelitis? In Sickle cell? And how is it spread?

Answer 2

S. aureus in normal pts, Salmonella in sickle cell;
Normally spreads contiguously in adults and haematogenously in children

Question 3

Most common organism causing septic arthritis?

Answer 3

S. aureus

Question 4

Ix / diagnostic criteria for septic arthritis?

Answer 4

Joint aspirate MC&S
Synovial count >50,000 cells/mm3
Blood culture

Question 5

Most common organism causing prosthetic joint infection?

Answer 5

Coagulase negative staph. > S. aureus

Question 6

Management for surgical site infection?

Answer 6

Flucloxacillin

Question 7

Management for osteomyelitis?

Answer 7

IV Abx
Surgical debridement 2nd line

Question 8

Mx for septic arthritis?

Answer 8

IV cephalosporin or fluclox & drain joint

Question 9

Mx of surgical site infection caused by MRSA?

Answer 9

IV Linezolid