Flea Allergy, Canine - contd.

ClinicalSigns
Pruritus, alopecia, barbered hairs, papules, erythematous macules with crusts, and acute moist dermatitis can be seen in a typical dorsal lumbar and tail base pattern. The lesions can extend to the thighs and caudal abdominal areas. Secondary pyotraumatic dermatitis, pyoderma, and seborrhea are commonly noted. Chronic skin changes include thickening of the dermis with acanthosis, hyperkeratosis and lichenification.

Symptoms
Common findings in a dog that is allergic to fleas include increased scratching or itchiness, loss of hair, hairs that appear broken, crusts and erosions of the skin, and pimple-like bumps. Thickened skin with darkened areas can be seen in severe cases. Fleas or flea feces, which can be difficult to detect, indicate the presence of fleas. Hot spots sometimes can be seen along the dog's back and tail base. These sores are usually circular, red, oozing, and very painful, often requiring medical attention.