Mange is caused by different types of mites, a parasite that lives in hair follicles or the skin of dogs. One type of mange--sarcoptic mange, or scabies,--is highly contagious. Demodectic mange, on the other hand, is caused by mites already living in the hair of nearly all dogs and usually affects dogs with weakened immune systems. If the symptoms of mange appear, contact a veterinarian as soon as possible.
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Generalized or Localized
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With both sarcoptic and demodectic mange, symptoms may appear in multiple areas of the dog's body or in only a few areas, like the face or legs. Localized cases are generally mild and easier to treat, whereas generalized cases require persistent and vigorous treatment.
Scratching
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Intense scratching, itching and biting of the skin are a common sign of sarcoptic mange. With scabies, mites tend to live on areas of the body with less hair, so itching frequently occurs on the elbows, head, arm pits, abdomen and chest. With demodectic mange, lesions on the dog may or may not itch.
Hair Loss
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Hair loss is a frequent symptom of both demodectic and sarcoptic mange. In cases of demodectic mange, hair loss usually begins on the dog's head but can spread to other areas of the body as the disease worsens.
Skin Lesions and Infections
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Skin lesions are commonly found in cases of demodectic mange. Localized cases tend to cause up to five lesions while generalized mange will cause more to appear. Lesions may also appear with sarcoptic mange. Small red pustules, yellow and crusted skin, redness, and sometimes a greased or moist looking areas of skin are also signs of mange in dogs. Secondary infections may also occur due to scratching and irritation of the skin and will require treatment such as antibiotics.
Other Symptoms
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Fever, loss of appetite and lethargy can also occur in severe cases of mange. Often prolonged and intense treatment will be required to treat these instances of mange in dogs.
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