Other Mites

The preferred hosts of mites of the orders Astigmata (e.g., Sarcoptes scabiei var. suis, S. scabiei var. canis, Notoedres cati, Psoroptes ovis), Prostigmata (e.g., Cheyletiella, Neotrombicula), or Mesostigmata (e.g., Dermanyssus, Ornithonyssus) are vertebrate animals (usually domestic animals), with occasional human infestations. On human hosts the mites remain temporarily on or in the skin without reproducing, causing a variety of skin lesions involving pruritus, most of which abate spontaneously if reinfestation can be prevented. It is importantto preventsuch infestations by treating of mite-infested animals and—if needed—by decontaminating their surroundings.

Some groups of nonparasitic ("free-living") mites are known to induce allergies. The so-called forage or domestic mites (e.g., Glyciphagus, Tyrophagus, Tyroglyphus) develop mainly in vegetable substrates (grain, flour, etc.) and can cause rhino-pathies, bronchial asthma, and dermal eczemas ("baker's itch," "grocer's itch") due to repeated skin contacts with or inhalation of dust containing mites. Widespread and frequent in human dwellings are several species of house-dust mites (above all Dermatophagoides pteronyssinus) that are an important cause of "house-dust allergy" (dermatitis, inhalation allergy).


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