What are the clinical manifestations of flea bite allergy dermatitis in dogs?

The allergy is caused by the irritating molecules and numerous allergens that make up the flea's saliva.
The animal is sensitized to flea saliva and develops symptoms upon contact with the insect.
The most affected areas are the inguinal region, the dorsal-lumbar area, the base of the tail, the tail, and the caudal face of the hind limbs.
The histology of the lesions is diagnostic and shows a predominance of eosinophils.
The diagnosis can be confirmed through allergy tests.