Rare bone infections "excluding the spine"

Area of Science:

• Infectious Diseases
• Orthopedics
• Microbiology

Background:

• Osteomyelitis commonly arises from Staphylococcus aureus, typically via hematogenous spread.
• Rare bone infections encompass a spectrum of diseases affecting bone, including bacterial, fungal, parasitic, and non-specific conditions.
• Examples of rare bone infections include tuberculosis, salmonellosis, brucellosis, actinomycosis, and various fungal infections.

Purpose of the Study:

• To review the common and rare causes of bone infections.
• To highlight diagnostic challenges and necessary investigations for rare bone infections.
• To emphasize the importance of clinical suspicion in diagnosing these conditions.

Main Methods:

• Literature review of common and rare bone infections.
• Discussion of etiological agents, routes of transmission, and clinical presentation.
• Overview of diagnostic modalities including imaging and biopsy.

Main Results:

• Staphylococcus aureus is the most frequent cause of osteomyelitis.
• Rare bone infections, though infrequent, present diverse etiologies (bacteria, fungi, parasites).
• Diagnostic workup often necessitates imaging (radiographs, CT, MRI, isotope studies) and invasive procedures like aspiration or biopsy.

Conclusions:

• A high index of clinical suspicion is crucial for diagnosing rare bone infections.
• Specific laboratory diagnoses can be challenging, necessitating a combination of methods.
• Rare bone infections can mimic non-infective bone pathologies, complicating diagnosis.