Cat fur mites (Lynxacarus radovskyi) were found on a domestic cat with alopecia and pruritus mainly living outside in Nago-city, Okinawa, Japan. The infected cat was treated with a single administration of topical spot-on typed fipronil/(S)-methoprene and daily oral administrations of doramectin. This cat indicated no skin problems after these treatments. Our case report suggests that L. radovskyi is one of the ectoparasites that might be encountered in clinical practice in subtropical regions, such as Okinawa, in Japan.

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A 4-year-old, castrated male French bulldog, and a 3-year-old, spayed female Shiba Inu presented with fistula at the bilateral metatarsus. Antimicrobials, and anti-inflammatory agents were not effective for either of these cases. Histopathological examinations revealed fibrosis along with neutrophils and mononuclear cells infiltration with vascular dilation and edema at the deep dermis and subcutaneous tissue. Based on these findings, both animals were diagnosed as having focal metatarsal fistulation. Tocopherol nicotinate, 200 mg, twice a day was administered to improveing peripheral circulation, and fistulosis were aparently disappeared. We suspected that ischemic dermatopathy played a role in its etiology.

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A six-year-old, spayed female West Highland White Terrier presented with pruritic behavior mainly on the trunk, which appeared just after grooming. A small dose of less irritable products were used in her ordinary grooming. Histopathologic findings of the skin showed superficial perivascular dermatitis along with spongiosis and lymphocytes infiltration in the epidermis. The serum allergen-specific immunoglobulin E test (Allercept Panel Test) revealed no abnormalities. Extrinsic stimuli-induced dermatitis was considered, and the dog treated with highly-concentrated, artificial carbon dioxide bathing instead of shampoo washing. This was successful and hair regrowth was observed.

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