Microbiology 12 - Wound, bone and joint infections Flashcards

1
Q

What is the major pathogen involved in wound, bone and joint infections?

A

MRSA/ MSSA

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
2
Q

What are the 3 levels of wound infection?

A

Superficial incisional
Deep incisional
Organ/ space infection

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
3
Q

Recall 2 important risk factors for wound/ bone/ joint infection

A

Diabetes

Obesity (adipose tissue is poorly-vascularised)

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
4
Q

What can be done during orthpaedic procedures to reduce risk of infection?

A

Laminar flow

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
5
Q

Which patient group is particularly at risk of septic arthritis?

A

Those who already have rheumatoid arthritis

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
6
Q

Where in the joint do organisms adhere to in septic arthritis?

A

Synovial membrane

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
7
Q

What are the symptoms of septic arthritis?

A

Red, painful and swollen joint with restricted movement

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
8
Q

What investigations for septic arthritis should be done before starting antibiotics?

A
  1. Blood cultures

2. Synovial fluid aspiration

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
9
Q

When is MRI indicated for septic arthritis patients?

A

When osteomyelitis is suspected

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
10
Q

How is septic arthritis managed?

A

4-6 weeks IV antibiotics

Surgical washout

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
11
Q

What are the symptoms of vertebral osteomyelitis?

A

Back pain and fever

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
12
Q

How is osteomyelitis diagnosed?

A

MRI

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
13
Q

How is vertebral osteomyelitis treated?

A

At least 6w of antibiotics

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
14
Q

What is the most common pathogen implicated in prosthetic joint infections?

A

Coagulase negative staphylococcus

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
15
Q

What would an x ray show in prosthetic joint infections?

A

Loosening

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
16
Q

How many tissue samples are required for the lab when a patient goes to theatre for a suspected joint infection?

A

5 (If >3 yield same organism = infection)

17
Q

What are the 2 options for management of prosthetic joint infection?

A
  1. Single stage revision (removal of manky prosthesis and replacement with antibiotic-impregnated material prosthesis)
  2. Two stage revision (firstly remove prosthesis and send off samples, put in a spacer, wait a few weeks, then put new prosthesis in)