Systemic allergic reaction to tree processionary caterpillar in children

Area of Science:

• Environmental Toxicology
• Pediatric Allergy
• Dermatology

Background:

• Tree processionary caterpillars (Thaumetopoea pityocampa) possess toxic hairs and spines that can trigger allergic reactions in humans.
• Allergic reactions range from skin manifestations like urticaria and dermatitis to severe systemic responses, including respiratory distress and anaphylaxis, primarily observed in forestry workers.

Observation:

• A case study details a 12-year-old child experiencing a systemic allergic reaction, characterized by pruritic rash, conjunctival hyperemia, dyspnea, and wheezing.
• The diagnosis of pine tree processionary caterpillar exposure was confirmed following repeated contact, highlighting a diagnostic challenge.

Findings:

• The child's symptoms were attributed to exposure to the pine tree processionary caterpillar.
• Delayed diagnosis occurred due to the need for repeated exposure to establish the link.

Implications:

• Pine tree processionary caterpillar exposure should be considered a potential cause of systemic allergic reactions in pediatric patients, particularly in endemic regions.
• Healthcare providers need to be aware of the diverse clinical presentations to ensure timely diagnosis and management of these allergic events.