Introduction Alopecia is defined as a total or partial lack of hair in areas where the hair normally present. It is quite common in dogs or as a primary or secondary problem, as a result of another underlying condition. There are clear differences between the cases of alopecia where you lose hair fibers grew, those in which stumps of hair fibers remain, and those where the root of the hair is shed from the hair follicle. Whatever the cause, alopecia reflects some disturbance in the hair follicle from trauma, infection, immunological / allergic attack, mechanical forces, endocrine / hormonal imbalances or abnormal cell receptor sites that control the growth cycle of hair loss in dogs causes capelli.Le
There is no particular age or sex predisposition to the development of alopecia, although some breeds of dogs do not seem at higher risk for some types alopecia. doberman dogs and many other breeds are prone to develop alopecia color dilution. Recurrent flank alopecia seasonal tends to occur in Boxers, Airedale Terrier Bulldog. Alopecia X (also known as reproductive and adrenal hormone imbalance sometimes called "black skin disease") occurs more commonly in plush-coated breeds like the Pomeranian, Chow Chow, Keeshond and miniature poodle, and even in arctic breeds (Samoyed, Siberian Husky, Alaskan Malamute).
Some of the most common causes of alopecia in dogs are described below.
Parasites External parasites are known to cause alopecia in dogs. Fleas, ticks, lice and mites can cause intense itching and scratching that leads to hair loss. Parasites can also physically damage the hair follicles, and parasites can cause allergic reactions to hair loss as well. Demodectic mange (caused by various species of mites that live within the hair follicles) causes hair loss localized with generalized redness and flaking slightly.
Fungal infections Fungal infections of the skin (called dermatophytosis) can cause partial to complete alopecia with scaling and redness associated with or without. Some fungal infections are zoonotic, which means that they have the potential to cause skin lesions in people. Bacterial infections
bacterial skin infections - particularly those caused by staphylococcal species - may cause alopecia with redness, crusting and circular patterns of hair loss. Bacterial folliculitis is the most common cause of multifocal alopecia in dogs.
hormonal / endocrine imbalances
Several other endocrine disorders commonly contribute to alopecia. Hyperadrenocorticism (Cushing's disease caused by iatrogenic hyperadrenocorticism veterinary corticosteroids), hypoadrenocorticism (Addison's disease), hypothyroidism, hyperthyroidism, hyperestrogenism (in females) and hypoandrogenism can cause some form of hair loss if the underlying condition is not controlled. Many dogs have focal loss of hair along the side and the genital regions or procedures shall spay neuter. testicular cancer (cancer) can also cause a hormonal basis of alopecia. Allergies
immune-mediated reactions to certain foods, chemicals, pollens, grasses and many other potential allergens are among the most common causes of hair loss in dogs. Inherited Conditions
Some types of alopecia have a genetic basis. These include acanthosis nigricans, alopecia X (also known as reproductive and adrenal hormone imbalance, sometimes simply "black skin disease"), follicular dysplasia, dilution of color mutant alopecia, congenital hypotrichosis, baldness, and pituitary dwarfism, among others.
reactions to medications or injections
reactions can lead to hair loss. For example, chemotherapy for cancer commonly causes alopecia. Hair loss often occurs at sites of injection, usually caused by an inflammatory reaction to the substance that was injected. Rabies vaccines have been known to cause hair loss in patches around the injection site 2 to 3 months after been given. Stress and nutritional deficiencies
nutritional deficiencies and other causes of stress can cause alopecia. Females who are nursing puppies often "blow their coat" - a type of hair loss probably caused by nutritional, physical. and emotional tension associated with childbirth and lactation. Dogs that are particularly anxious or high strung, have psychological or behavioral (separation anxiety, etc.), or have abusive backgrounds may also lose their hair due to stress.
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