Synovitis secondary to giardiasis in children

Area of Science:

• Infectious Diseases
• Rheumatology
• Pediatrics

Background:

• Giardia lamblia is a prevalent gastrointestinal protozoan worldwide.
• Giardiasis, often linked to poor sanitation, can manifest with extraintestinal symptoms.
• Reactive arthritis or synovitis is a potential, though rarely reported, complication of Giardia infection.

Observation:

• This study identified two pediatric cases of Giardia synovitis over two decades.
• Both patients presented with knee joint inflammation and were initially misdiagnosed with septic arthritis.
• Symptoms resolved following treatment for Giardia infection.

Findings:

• Giardia synovitis is an uncommon but potentially underdiagnosed complication of giardiasis.
• Diagnostic clues include Giardia cysts in stool, family history, synovial fluid white blood cell count <40,000, and elevated eosinophils.
• Prompt treatment of the underlying parasitic infection is crucial for joint symptom resolution.

Implications:

• Highlights the importance of considering Giardia infection in pediatric patients with unexplained synovitis.
• Emphasizes the need for increased awareness among clinicians regarding the musculoskeletal manifestations of giardiasis.
• Suggests that timely diagnosis and treatment of giardiasis can prevent prolonged joint inflammation and misdiagnosis.