BONE AND JOINT INFECTION Flashcards
How do bones most often become infected?
Through haematogenous spread.
By what other means can bacteria or microorganisms reach bone?
Spread from soft tissue such as cellulitis
Direct inoculation - in surgery
Name 7 features of haematogenous OM?
Pus Oedema Congestion Abscess Sequestrum (dead bone) Involucrum (new bone) Sinus
What is the most common organism responsible for osteomyelitis in all age groups?
Staph aureus
How soon after the intial symptoms of infection will the infection be clear through imaging?
About 2 weeks
What are you looking for on a radiograph?
Lucency
What is spondylodiscitis?
Infection of a vertebral disc
How long should a course of antibiotics be for someone that presents with acute osteomyelitis?
6 weeks
How long should the course of antibiotics be for someone who presents with chronic osteomyelitis?
12 weeks
How long should a course of antibiotics be for a child who presents with osteomyelitis?
2-4 weeks
Define septic arthritis.
Infection of the synovium.
What is the organism which underlies most cases of septic arthirtis?
Staph aureus.
What are the surgical treatment options for septic arthritic patients?
Aspirate
Arthroscopic drainage
Open washout
What is the infection rate for primary intervention procedures?
1.5 - 2.5%
What are the organisms most often responsible for an infection of a prosthetic joint?
Staph epidermidis and aureus.
