Lyngbya dermatitis (toxic seaweed dermatitis).

Area of Science:

• Dermatology
• Marine Biology
• Toxicology

Background:

• Lyngbya dermatitis is an irritant contact dermatitis caused by the blue-green alga Lyngbya majuscula.
• This alga is prevalent in tropical and temperate marine environments globally.
• Exposure typically results in a characteristic rash following water contact.

Observation:

• A 13-year-old female presented with vesicles and papules on her abdomen after swimming.
• The eruption appeared in a bathing suit distribution pattern.
• Symptoms began with itching and burning, progressing to blisters and erosions.

Findings:

• Histopathological examination confirmed acute irritant contact dermatitis.
• The clinical presentation and history were consistent with Lyngbya dermatitis.
• Lyngbya majuscule contains numerous bioactive compounds.

Implications:

• Lyngbya dermatitis should be considered in the differential diagnosis of acute contact dermatitis.
• Understanding the etiology is crucial for appropriate patient management and prevention.
• Further research into the toxins of L. majuscule may yield therapeutic insights.