Final answer:
Flea Allergic Dermatitis (FAD) is a severe allergic reaction to flea saliva, characterized by an itchy, inflammatory skin response. It is a Type I Hypersensitivity, and a single flea bite can cause intense symptoms in a sensitized animal. Treatments may include antihistamines, corticosteroids, and immunosuppressants, along with stringent flea control.
Step-by-step explanation:
Flea Allergic Dermatitis (FAD) is a type of hypersensitivity and one of the most common dermatological conditions affecting pets. It's a severe allergic reaction to the saliva of fleas, which causes extreme itching and discomfort. The reaction causes symptoms such as inflamed skin, hair loss, and secondary skin infections due to the animal's excessive scratching, biting, and licking of the affected areas. It is considered a Type I Hypersensitivity reaction where the presence of flea saliva leads to an overactive immune response. A single flea bite can trigger this intense allergic reaction in a sensitized animal.
Managing FAD typically involves a combination of flea control measures on the pet and within the environment, as well as treatments to relieve the itchy skin symptoms. This may include antihistamines, corticosteroid creams, and immunosuppressants to control the inflammatory response. It is important to address FAD promptly to prevent more serious complications and ensure the animal's comfort and health.