Vet360, December 2016 - Page 14

DERMATOLOGY Figure 3. A cat with pemphigus foliaceus lesions on the paws, specifically around the base of the nailbeds. Figure 1. A cat with mosquito bite hypersensitivity, showing lesions on the pinna and nares. environmental flea control, and using a topical flea control product every two weeks for at least three doses (selamectin-containing products are some of her favorites in cats since they also rule out  Notoedres species infection). Taking a thorough history with cats that are allergic to mosquito bites is also super important. Dr. Ghubash has seen cats with mosquito bite hypersensitivity be misdiagnosed as having neoplasia. These cats often present with dermatitis on their ears, rostral nares and paws (Figure 1). Pemphigus foliaceus This autoimmune disorder can certainly mimic allergies in cats, says Dr. Ghubash, which is another reason why vaccination and drug administration history is important. Cats with pemphigus foliaceus tend to present with lesions on their ears, nailbeds and nipples (Figures 2-3). As a side note, Dr. Ghubash says, “Cats don’t get allergic dermatitis like dogs do.” If the nailbeds are involved, think pemphigus first. Chin acne “The biggest thing in treating this condition is making sure you are identifying and adequately treating the infection,” Dr. Ghubash says. “You may need six to eight weeks of antibiotic therapy to knock it out.” A Eosinophilic granuloma complex Remember that eosinophilic granuloma complex is a clinical sign of allergies. It can produce four types of allergic reactions in cats: • Indolentulcers • Eosinophilic plaques • Linear granulomas • Eosinophilic granuloma plaques When you see any of these lesions, be sure to check the mouth and palate of the cat you’re examining. Dr. Ghubash says that she has found quite a few cats that have these other signs and then painful other lesions that were missed in those cats’ mouths. AND DON’T FORGET ... Other syndromes that can cause pruritus in cats are cutaneous lymphoma, paraneoplastic syndrome and autoimmune disease. Also, if the cat has a history of upper respiratory viral infection, you might consider viral dermatitis as a cause. B Figures 2A and 2B: Cats with pemphigus foliaceus lesions on their pinna. Reference 1. Raditic DM, Remillard RL, Tater KC. ELISA testing for common food antigens in four dry dog foods used in dietary elimination trials. J Anim Physiol Anim Nutr (Berl)2011;95(1):90-97. Shaping the future of animal health vet360 Issue 06 | DECEMBER 2016 | 14