T63.611 Toxic effect of contact with Portuguese Man-o-war, accidental (unintentional)

Name of the Condition

• Toxic effect of contact with Portuguese Man-o-war, accidental (unintentional)

Summary

This condition describes adverse health effects resulting from accidental contact with the Portuguese Man-o-war, a marine cnidarian. The effects typically involve localized skin reactions due to its venomous tentacles, though systemic reactions may occur in severe cases.

Causes

Contact with the Portuguese Man-o-war’s tentacles introduces venom into the skin, triggering inflammatory responses. The venom contains toxins that cause pain, irritation, and potential systemic effects if absorbed in sufficient quantities.

Risk Factors

• Swimming or wading in coastal waters where Portuguese Man-o-war are present.
• Handling beached or stranded specimens.
• Lack of protective gear (e.g., wetsuits, gloves) in marine environments.
• Seasonal increases in Portuguese Man-o-war populations.

Symptoms

• Immediate localized pain, stinging, or burning at the contact site.
• Redness, swelling, or raised welts (urticaria) on the skin.
• Itching or numbness in the affected area.
• Systemic symptoms like nausea, headache, or muscle cramps in severe cases.

Diagnosis

Clinical evaluation of symptoms and exposure history. Identification of tentacle contact or visible tentacle marks. Laboratory tests are rarely needed unless systemic toxicity is suspected.

Treatment Options

• Immediate rinsing of the affected area with seawater (avoid freshwater, which may worsen toxin release).
• Removal of tentacle fragments with tweezers or a stick.
• Application of hot water (45°C) to reduce pain.
• Over-the-counter pain relievers or antihistamines for mild reactions.
• Medical evaluation for severe or systemic symptoms.

Prognosis and Follow-Up

Most cases resolve within hours to days with minimal intervention. Severe reactions may require monitoring for systemic effects. Follow-up is unnecessary for mild cases unless symptoms worsen.

Complications

• Secondary skin infections from broken blisters.
• Prolonged pain or hypersensitivity at the contact site.
• Rare systemic reactions (e.g., respiratory distress) in highly sensitive individuals.

Lifestyle & Prevention

• Avoid swimming in areas with visible Portuguese Man-o-war or warning signs.
• Wear protective clothing (e.g., wetsuits) in high-risk waters.
• Educate swimmers on recognizing and avoiding these organisms.
• Carry a first-aid kit with vinegar (to neutralize tentacles) for marine activities.

When to Seek Professional Help

Seek medical attention if symptoms include severe pain, widespread rash, difficulty breathing, or signs of infection (e.g., pus, fever).

Tips for Medical Coders

Use this code for accidental, unintentional contact with Portuguese Man-o-war. Document the exposure context (e.g., marine environment, activity) and clinical findings (e.g., tentacle marks, symptoms) to support coding accuracy.