MSK- infections

Question 1

osteomyelitis

Answer 1

infection of bone and/or bone marrow

Question 2

osteomyelitis usually occurs in

Answer 2

children but can occur in adults

Question 3

risk factors osteomyelitis

Answer 3

immunocompromised
elderly
young
patients with chronic disease

Question 4

osteomyelitis in newborn organisms

Answer 4

s.aureus, enterobacter sp, group a and group b strep

Question 5

osteomyelitis in children

Answer 5

s.aureus, enterobacter, group a strep, h.influenza

Question 6

osteomyelitis in adults

Answer 6

s.aureus, occasionally enterobacter/strep

Question 7

osteomyelitis in sickle cell anaemia patients organism

Answer 7

s.aureus, salmonella

Question 8

gold standard test for osteomyelitis

Answer 8

bone biopsy to confirm

Question 9

septic arthritis

Answer 9

inflammation of joint space caused by infection

Question 10

most common organism cause of septic arthritis in adults

Answer 10

straph aureus

Question 11

second most common organism cause of septic arthritis in adults

Answer 11

streptococci

Question 12

most common organism cause of septic arthritis in children

Answer 12

H.infleunza- uncommon where vaccine is

Question 13

cause of septic arthritis in young adults

Answer 13

neisseria gonorrhoea

Question 14

E.coli in septic arthritis

Answer 14

elderly, Iv drug users, seriously ill

Question 15

septic patients antibiotics

Answer 15

flucloxacillin, if under 5 add ceftrioxine

Question 16

risk factors for PJI

Answer 16

• Presence of comorbidities e.g. rheumatoid arthiritis, diabetes, malignancy
• Use of corticosteriods, TNF inhibitors
• Prior arthroplasty or prior infection at surgical site
• Prolonged duration of surgery
• Postoperative complications
• Staph. aureus bacteraemia (from another cause)

Question 17

debridement

Answer 17

removal of dead, damaged, or infected tissue

Question 18

PIJ management early/haematogenous- DAIR

Answer 18

debridement, antibiotics (12 weeks), implant retention

Question 19

PIJ management chronic disease for frail patients

Answer 19

removal of joint and antibiotics

Question 20

PIJ management chronic disease

Answer 20

removal of joint and aggressive antibiotic therapy for 6 weeks, revision joint replacement