Synonym(s)
Carpet beetle dermatitis; Carpet beetle larvae dermatitis; Museum beetle larvae dermatitis
DefinitionThis section has been translated automatically.
Itchy urticarial-papular skin reaction caused by contact with larvae of the Anthrenus beetle.
PathogenThis section has been translated automatically.
Larvae of Anthrenus scrophulariae (common carpet beetle), Anthrenus museorum (museum beetle) and other Anthrenus species.
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EtiopathogenesisThis section has been translated automatically.
The larvae, which feed on dry keratin-containing substances, live in wool, furs, skin scales, carpets and stuffed animals. Contact with the arrowhead-like hairs of the larva causes allergic skin reactions.
LocalizationThis section has been translated automatically.
Lower leg and trunk, usually in symmetrical arrangement.
Clinical featuresThis section has been translated automatically.
Up to 8 mm large, loosely disseminated, erythematous, partially excoriated, symmetrically distributed papules. Different degrees of itching.
HistologyThis section has been translated automatically.
Acanthosis, parakeratosis, necrobiosis of superficial epithelial layers, subepidermal edema with erythrocyte extravasations and lymphocyte infiltrates (numerous eosinophils).
DiagnosisThis section has been translated automatically.
Immediate urticarial reaction in the prick test with larval extract. Itchy, papular late type reaction detectable for about 4 days. Detection of larvae in the apartment.
Differential diagnosisThis section has been translated automatically.
Bedbug bites (urticarial grouped distribution pattern), human fleas (diascopically detectable purpura pulicosa), trombidiosis (urticarial plaques in the area of tight clothing), cercaria (bathing in suspicious waters).
Complication(s)This section has been translated automatically.
Pulmonary symptoms with asthmatic reaction.
TherapyThis section has been translated automatically.
Preparations containing glucocorticoids. Regular sweeping or vacuuming and removal of furs, pelts, stuffed animals and wool carpets. Insecticides, e.g. pyrethrum extracts.
LiteratureThis section has been translated automatically.
- Ahmed AR, Moy R, Barr AR, Price Z (1981) Carpet beetle dermatitis. J Am Acad Dermatol 5: 428-432
- Horster S, Prince JC, Holm N, Wollenberg A (2002) Anthrenus dermatitis. dermatologist 53: 328-331
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Disclaimer
Please ask your physician for a reliable diagnosis. This website is only meant as a reference.
Prof. Dr. med. Peter Altmeyer