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Flea Allergy Dermatitis

Many cats and dogs bitten by fleas suffer only minor irritation. However, some pets are allergic to the cat flea bite and may experience severe itching. This condition is known as flea allergy dermatitis, or FAD. FAD is a skin disease afflicting dogs and cats and is caused by an allergic reaction to flea saliva. FAD is most prevalent on pets in summer when high temperatures provide ideal conditions for flea development and infestation, and pets are often spending more time outdoors.

The itching caused by FAD can result in dramatic hair loss, as well as open sores and scabs. Open wounds are then susceptible to secondary bacterial infections, which produce strange odors. In cats, the hind legs and area directly in front of the tail are most commonly affected first, while the rump and tip of the tail are affected first in dogs. Dogs are particularly sensitive in the flanks and thighs and will scratch most aggressively in these areas. Lesions may be present on the lower back and inner thighs of dogs with FAD. If allowed to progress, affected areas become pigmented.

The first step in treating FAD is the removal of all fleas from the pet. Many topical treatments are available to this end and vary in price and application method. Other medications may be administered orally and are available in specialty pet stores, through your veterinarian or pet specialist. Treatments differ for cats and dogs, so be sure to purchase the correct product and read the instructions carefully. Dogs and cats with FAD may also require treatment of secondary skin infections. Antibiotics and antifungal drugs are effective and can be obtained through your veterinarian.

Treating a pet infestation does not address an entire flea population. After administering the appropriate medication to your pet, ensure that your home and yard are free of fleas and that your pet does not frequent flea-infested areas. Clean all floors and bedding and consult a pest control professional to discuss further extermination options.

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