Isolated articular melioidosis

Area of Science:

• Infectious Diseases
• Microbiology
• Rheumatology

Background:

• Melioidosis is caused by Pseudomonas pseudomallei, a gram-negative bacterium.
• It is increasingly diagnosed in non-endemic regions and can cause severe, fatal infections.
• Articular melioidosis, particularly isolated joint involvement, is rare and often secondary to other infections.

Purpose of the Study:

• To describe the clinical presentation, diagnosis, and treatment of isolated articular melioidosis.
• To highlight the importance of high suspicion for accurate diagnosis.
• To evaluate treatment outcomes in patients with and without underlying diseases.

Main Methods:

• Retrospective case series of nine patients diagnosed with isolated articular melioidosis between 1984 and 1988 in Northeast Thailand.
• Diagnostic methods included Gram's stain, pus and blood cultures, and indirect hemagglutination titers.
• Treatment involved initial intravenous antibiotics (cotrimoxazole, doxycycline, chloramphenicol) with second-line options (ceftazidime, cotrimoxazole) for refractory cases.

Main Results:

• Nine cases of isolated articular melioidosis were identified, with subtle symptoms requiring high clinical suspicion.
• Bacteriologic methods and serologic titers were key to diagnosis.
• Initial antibiotic regimens were generally satisfactory, with second-line drugs used for specific cases.
• No significant difference in disease course or treatment duration was observed between patients with and without underlying diseases.

Conclusions:

• Isolated articular melioidosis can be diagnosed using bacteriologic and serologic methods.
• Prompt antibiotic therapy, including combinations like cotrimoxazole, doxycycline, and chloramphenicol, is effective.
• Early and accurate diagnosis is vital for managing this potentially life-threatening infection, even in non-endemic areas.