Flea-collar contact dermatitis.
D000818:Animals; D003877:Dermatitis, Contact / Q000209:etiology / Q000662:veterinary*; D004006:Dichlorvos / Q000009:adverse effects; D004283:Dog Diseases / Q000209:etiology*; D004285:Dogs; D007306:Insecticides / Q000009:adverse effects*; D009946:Organothiophosphorus Compounds / Q000009:adverse effects*; D005423:Siphonaptera