Infection from Toxocara species may give rise to a large array of clinical symptoms, including apparentmanife stations of allergy such\nas asthma, urticaria/angioedema, and dermatitis.We report a case, thus far not described, of contact dermatitis attributed to nickel\nallergy but caused by Toxocara infection. The patient was a 53-year-old woman presenting from10 years a dermatitis affecting head,\nneck, and thorax. Patch tests initially performed gave a positive result to nickel, but avoidance of contact with nickel did not result\nin recovery.The patient referred to our Allergy Service in 2010 because of dermatitis to feet. Patch testing confirmed the positive\nresult for nickel, but expanding the investigation a positive result for IgG antibodies to Toxocara was detected by Western blotting\nand ELISA. Treatment with mebendazole achieved immediate efficacy on feet dermatitis. Then, two courses of treatment with\nalbendazole resulted in complete regression of dermatitis accompanied by development of negative ELISA and Western blotting\nfor Toxocara antibodies. This report adds another misleading presentation of Toxocara infection as apparent contact dermatitis\ncaused by nickel and suggests bearing in mind, in cases of contact dermatitis not responding to avoidance of the responsible hapten\nand to medical treatment, the possible causative role of Toxocara.
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