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Cheyletiellosis

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Cheyletiellosis

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Cheyletiellosis is a mild dermatitis caused by the Cheyletiella species of mites. It is also known as walking dandruff. Cheyletiella are large mites that live on the skin surface of dogs, cats, rabbits, and humans. They do not burrow into the skin but live in the keratin level. Their entire 21 day life cycle is on one host. They cannot survive off the host for more than 10 days.

Cheyletiellosis is highly contagious. Transmission is by direct contact with an affected animal. Symptoms in animals very from no signs to intense itching, scales on the skin, and hair loss. Symptoms in humans include multiple red, itchy bumps on the arms, trunk, and buttocks. Because humans are an irregular host for the mite, the symptoms usually go away in about three weeks.

Diagnosis is by finding the mites or eggs microscopically in a skin scraping or a combing. The most common treatment in animals is weekly use of some form of topical pesticide appropriate for the affected animal, often an anti-flea product. Fipronil works well. In unresponsive cases, ivermectin is used.

Cheyletiella species

  • Cheyletiella yasguri - infests dogs
  • Cheyletiella blakei - infests cats
  • Cheyletiella parasitivorax - infests rabbits

Each of these species can affect humans.

References

Griffin, Craig E.; Miller, William H.; Scott, Danny W.(2001). Small Animal Dermatology (6th ed.). W.B. Saunders Company. ISBN 0-7216-7618-9


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This guide is licensed under the GNU Free Documentation License. It uses material from the Wikipedia.


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