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Hair loss is originally seen in areas of repeated grooming or trauma, for instance the neck because of contact with a collar. Hair regrowth may occur, but the hair will be even weaker and the pattern will repeat. The dogs are affected between the ages of two and four years, and it is most commonly seen on the back towards the tail.
Sebaceous adenitis and hair loss in a dog. Sebaceous adenitis is an uncommon skin disease found in some breeds of dog, and more rarely in cats, rabbits and horses. [1] characterised by an inflammatory response against the dog's sebaceous glands (glands found in the hair follicles in the skin dermis), which can lead to the destruction of the gland.
Dermatophytosis as a cause of alopecia is common in cats, too, and in long-haired varieties, dermatophytic pseudomycetomas may be to blame. [7] Alopecia areata has been studied on mice in laboratories. [8] In horses, human contact with the horse and the rubbing of the saddle across the mane can cause patches of hair loss. [7]
A dog with skin irritation and hair loss on its leg caused by demodectic mange. Infectious skin diseases of dogs include contagious and non-contagious infections or infestations. Contagious infections include parasitic, bacterial, fungal and viral skin diseases. One of the most common contagious parasitic skin diseases is Sarcoptic mange (scabies).
Fleas* cause itching and hair loss. The most common flea in dogs is the cat flea, Ctenocephalides felis, followed by the dog flea, C. canis. [32] Ticks* are an external parasite of the dog and can spread diseases such as Lyme disease, Rocky Mountain spotted fever, babesiosis, and ehrlichiosis.
A lick granuloma, also known as acral lick dermatitis, is a skin disorder found most commonly in dogs, but also in cats. In dogs, it results typically from the dog's urge to lick the lower portion of one of their legs. The lesion can initially be red, swollen, irritated, and bleeding, similar to a hot spot (wet eczema).
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A dog that is repeatedly exposed to a particular allergen becomes sensitized to it, and the immune system overreacts to a subsequent exposure, most commonly manifesting in the form of skin irritation. [1] Some of the signs are redness, itching, hair loss, and recurring skin infections from the irritation. The dog may be more prone to scratching ...