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[Anthrenus dermatitis]
1Klinik und Poliklinik für Dermatologie und Allergologie, Klinikum der Universität-Innenstadt, Frauenlobstrasse 9-11, 80337 München.
Summary
Museum beetle larvae caused itchy papular dermatitis in a family. Prompt eradication of the Anthrenus museorum L. larvae and topical glucocorticoids led to complete remission of the allergic skin reaction.
Area of Science:
- Dermatology
- Allergology
- Entomology
Background:
- Papular dermatitis can manifest from various environmental triggers.
- Anthrenus museorum L. (museum beetle) infestations are uncommon causes of dermatological conditions.
Observation:
- A 31-year-old male presented with widespread itchy papules, particularly on the legs, developing over 4 weeks.
- Similar lesions appeared in his wife and two daughters within a week.
- Numerous museum beetle larvae were found in the patient's apartment.
Findings:
- A prick test with museum beetle larva extract elicited a positive reaction, followed by a delayed hypersensitivity response.
- Clinical, historical, and histological data confirmed papular Anthrenus-dermatitis.
- Complete remission of dermatitis in all family members was achieved.
Implications:
- This case highlights museum beetles as a potential cause of allergic contact dermatitis in household environments.
- Effective management involves environmental control (larvae eradication) and symptomatic treatment (topical glucocorticoids).
- Early diagnosis and intervention are crucial for resolving papular dermatitis outbreaks linked to insect infestations.