Comparing Pathogens in Bone and Joint Infections
Author Information
Author(s): Annalise Unsworth, Bernadette Young, Matthew Scarborough, Martin McNally
Primary Institution: Nuffield Orthopaedic Centre, Oxford University Hospitals
Hypothesis
Is there a difference in the bacterial species isolated in osteomyelitis, fracture-related infection, and prosthetic joint infection?
Conclusion
Causative pathogens are similar across bone and joint infections and are independent of the presence of prosthetic material.
Supporting Evidence
- Staphylococcus aureus was the most commonly isolated organism in all three groups.
- Patients with prosthetic joint infection were older and more likely to be female.
- Polymicrobial infection was more common in osteomyelitis compared to prosthetic joint infection.
Takeaway
This study looked at infections in bones and joints to see if different types of infections have different germs. It found that the germs are mostly the same, whether or not there are implants.
Methodology
This was a retrospective, observational cohort study analyzing medical records of patients with bone and joint infections who had surgical intervention and positive microbial cultures.
Potential Biases
Prior antibiotic treatment history was not consistently available, which may have affected culture results.
Limitations
The study is a single-centre retrospective review, which may limit the generalizability of the findings.
Participant Demographics
{"age":{"osteomyelitis":"56 years","fracture_related_infection":"56 years","prosthetic_joint_infection":"70 years"},"sex_distribution":{"osteomyelitis":"76.7% male","fracture_related_infection":"65.2% male","prosthetic_joint_infection":"44.4% male"},"ASA_score":{"osteomyelitis":2,"fracture_related_infection":2,"prosthetic_joint_infection":3},"BMI":{"osteomyelitis":26,"fracture_related_infection":27,"prosthetic_joint_infection":30}}
Statistical Information
P-Value
{"Staphylococcus_aureus":0.016,"polymicrobial_infection":0.013}
Confidence Interval
{"Staphylococcus_aureus":"95% CI 0.633–1.232","polymicrobial_infection":"95% CI 0.803–1.721"}
Statistical Significance
p<0.05
Digital Object Identifier (DOI)
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