Case study: mariner's TB

Area of Science:

• Microbiology
• Infectious Diseases
• Dermatology

Background:

• Mycobacterium marinum is an aquatic bacterium responsible for tuberculosis in fish and shellfish.
• Human infection occurs via inoculation, often through contact with contaminated water or aquatic animals.
• Cutaneous manifestations are the most common presentation in humans.

Observation:

• A case study involving a nodule on the wrist, initially misdiagnosed as arthritis.
• The lesion was surgically excised, but tuberculosis symptoms persisted for two years.
• This highlights potential diagnostic challenges and the chronic nature of M. marinum infections.

Findings:

• Mycobacterium marinum infection can lead to persistent cutaneous lesions.
• Misdiagnosis as other conditions like arthritis can delay appropriate treatment.
• The case underscores the zoonotic potential of M. marinum.

Implications:

• Increased awareness and education are crucial for high-risk populations, including seafood industry workers, aquarists, and aquarium hobbyists.
• Further research is needed to improve diagnostic strategies and treatment protocols for M. marinum infections.
• Preventive measures and early recognition are key to managing this occupational and recreational hazard.