Localized demodicosis was diagnosed in 46 dogs, accounting for 0.6% of the canine dermatology cases and 0.1% of the canine hospital population over an 11-year period. Seventy-two percent of the dogs were less than 12 months old when examined. Rottweilers, collies, and German shepherds appeared to be over-represented. Lesions were most commonly seen on the periocular region, face, chin, and lip, but occurred in a variety of body sites. Lesions were asymptomatic and the dogs were otherwise healthy. No dog received miticidal therapy. Wherein follow-up was available (85% of the cases), all dogs spontaneously recovered and did not relapse.

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Fleas not satisfactorily eliminated by repeated administration of an imidacloprid product to a dog were examined. Flea specimens collected from the dog were identified as the cat flea Ctenocephalides felis. Sensitivity of the flea isolate to imidacloprid and fipronil was evaluated by in vitro knock-down tests in comparison with 3 isolates obtained from other dogs naturally infested by cat fleas. The isolate from the refractory case was found to show low sensitivity to imidacloprid, but was sensitive to fipronil. The fleas on the 4 dogs were then completely eliminated with a spot-on formulation containing fipronil as an active ingredient.

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A one-year-old, neutered male Scottish Fold cat was presented with possible ceruminous adenocarcinomas that had occurred simultaneously and symmetrically in both external ear canals. Macroscopically, there were a bleeding ulcerated papule that was black and 5 mm in diameter in the left ear canal, and two adjacent papules that were both dark red and black, and 3 mm both in diameter in the right ear. The locations of the papules were similar in both canals, and near the orifices of the canals. There was no finding consistent with otitis externa in either canal. The histopathology of the ceruminous glands of both canals revealed adenomatous and/or papillomatous proliferations in various degrees with significant atypias and infiltrations. Taking account of these findings, vertical ear ablations were performed bilaterally with adequate margins around tumors including normal skins and auricular cartilages.

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This study was conducted on 36 normal pigs in order to characterize the normal cytological findings in specimens taken from the vertical ear canal by swabbing. Gram-positive cocci and yeasts were detected in 28% and 39%, respectively, of the samples. Bacterial rods were rarely found. Forty-seven percent of the samples contained neither bacteria nor yeasts. Corneocytes were consistently present individually or in clumps. Leukocytes and erythrocytes were not found.

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Here, we report three cases of foreign body granuloma resembling nodular sterile panniculitis in Miniature Dachshunds. Physical examinations revealed subcutaneous nodules in all three cases. Incision biopsy revealed the presence of a needle-leaf (case 1), a bamboo stick (case 2) and sutures (case 3) in the subcutaneous lesions. Histopathological analysis revealed suppurative granulomatous changes surrounding the foreign bodies within the subcutaneous tissues. These findings indicate that incision biopsy should be performed to confirm or to exclude the diagnosis of foreign body granuloma, when subcutaneous nodules are recognized in dogs.

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