Microbiology 12 - Wound, bone and joint infections Flashcards
What is the major pathogen involved in wound, bone and joint infections?
MRSA/ MSSA
What are the 3 levels of wound infection?
Superficial incisional
Deep incisional
Organ/ space infection
Recall 2 important risk factors for wound/ bone/ joint infection
Diabetes
Obesity (adipose tissue is poorly-vascularised)
What can be done during orthpaedic procedures to reduce risk of infection?
Laminar flow
Which patient group is particularly at risk of septic arthritis?
Those who already have rheumatoid arthritis
Where in the joint do organisms adhere to in septic arthritis?
Synovial membrane
What are the symptoms of septic arthritis?
Red, painful and swollen joint with restricted movement
What investigations for septic arthritis should be done before starting antibiotics?
- Blood cultures
2. Synovial fluid aspiration
When is MRI indicated for septic arthritis patients?
When osteomyelitis is suspected
How is septic arthritis managed?
4-6 weeks IV antibiotics
Surgical washout
What are the symptoms of vertebral osteomyelitis?
Back pain and fever
How is osteomyelitis diagnosed?
MRI
How is vertebral osteomyelitis treated?
At least 6w of antibiotics
What is the most common pathogen implicated in prosthetic joint infections?
Coagulase negative staphylococcus
What would an x ray show in prosthetic joint infections?
Loosening
