Mites

Image of veterinarian cleaning a cat's ears.

There are many types of mites that infect dogs, cats, and other animals. Mites are microscopic arthropod parasites that, for the most part, infect the skin or mucous membranes. Mites can even be present on birds and reptiles. The most common mites that infect dogs and cats are ear mites, Demodex, scabies, and Cheyletiella.

Ear mites are very common on cats and are occasionally seen on dogs. They live primarily in the ear canals and can cause severe irritation. They are easily transmitted between pets, so if they are found in one pet, all pets in contact should be treated. A different species of ear mite can infect rabbits.

Demodex is a mite that all dogs are exposed to, but only a small percentage of dogs develop skin problems. In young puppies, it usually causes small areas of hair loss especially on the head and front legs. Adult dogs tend to show more generalized symptoms, and usually have more red, itchy skin lesions. Adult dogs that develop Demodex usually have another disease such as hypothyroidism, Cushings, or cancer that suppresses the immune system and allows the Demodex to increase in numbers and cause lesions. It is now recognized that cats have their own species of Demodex, but the disease is much more rare in cats.

Scabies is a skin disease in dogs or people caused by the mite Sarcoptes. Most dogs with this disease are intensely itchy. Scabies is highly contagious, but not all dogs in contact are as itchy. People also have their own species of Sarcoptes; most of their cases are due to the human scabies mite, but it is possible for people to develop lesions from the dog scabies mite.

Cheyletiella species of mites can be seen in rabbits and dogs. It is especially seen in puppies as large flakes of scale and is sometimes called "walking dandruff." There is no one treatment that will kill all the types of mites discussed here. Your veterinarian can advise you on the various treatments for each problem.

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  • "Free Home Animal Hospital has been our family's veterinarian for over 7 years and we can't imagine trusting our pups with anyone else. We have had our share of pup emergencies and they always answer and help us immediately and even during holidays. The whole staff is caring and Dr. Karl is by far the best vet I could imagine working with."
    Karen Lowe Nelson
  • "Today we said goodbye to our 4 legged baby Potter. The staff here has been nothing but amazing since we took him here 12 years ago. To Dr. Karl, Dr. Landrum and the entire staff. Thank you so much for everything you have done for him. A special thanks to a special lady. Thank you Dianne for caring as much as you do. Hope you all have a wonderful holiday. Thanks again"
    Richard Enright