Beaver fever--a rare cause of reactive arthritis

Area of Science:

• Infectious Diseases
• Rheumatology
• Microbiology

Background:

• Reactive arthritis is a form of inflammatory arthritis that affects joints.
• Giardia lamblia is a protozoan parasite that causes giardiasis, an intestinal infection.
• The association between Giardia lamblia infection and reactive arthritis is uncommon, particularly in adults.

Observation:

• This report details the first documented case of Giardia lamblia-associated reactive arthritis in North America.
• A review of pediatric and adult literature was conducted to understand existing cases.
• The case highlights a rare but significant extraintestinal manifestation of Giardia lamblia infection.

Findings:

• Giardia lamblia infection, while typically causing gastrointestinal symptoms, can trigger reactive arthritis.
• Antimicrobial therapy is a key component in managing both the parasitic infection and the subsequent arthritis.
• Early diagnosis and treatment are essential for favorable outcomes.

Implications:

• This case expands the understanding of potential complications associated with Giardia lamblia infections.
• It underscores the importance of considering parasitic infections in the differential diagnosis of reactive arthritis, even in adults.
• Effective antimicrobial strategies are vital for controlling both the infection and its rheumatologic sequelae.