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− | [[File:chey.jpg|right|thumb|100px]]
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| + | Also known as: '''''Walking dandruff''''' |
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− | {{unfinished}} | + | ==Introduction== |
− | {| cellpadding="10" cellspacing="0" border="1"
| + | {{Taxobox |
− | | Also known as: | + | |name =''Cheyletiella'' |
− | | '''Walking dandruff''' | + | |phylum =Arthropoda |
− | |- | + | |class =Arachnida |
− | |} | + | |subclass =Acari |
| + | |order =Trombidiformes |
| + | |family =Cheyletidae |
| + | |genus =Cheyletiella |
| + | }} |
| + | [[Image:cheyletiella.jpg|thumb|right|200px|''Cheyletiella mite'' - Kalumet 2004,Wikimedia Commons]] |
| + | [[Image:cheyletiella 2.jpg|thumb|right|200px|''Cheyletiella mite closeup'' - Kalumet 2004,Wikimedia Commons]] |
| + | [[File:chey.jpg|right|thumb|175px|<small><center>Cheyletiellosis in a Labrador Retriever (from Uwe Gille (2008), Wikicommons]</center></small>]] |
| + | Cheyletiellosis is a contagious disease caused by ''Cheyletiella'' sp. The [[:Category:Mites|mites]] live on the [[Skin - Anatomy & Physiology|skin]] surface causing itching and [[Skin Glossary - Pathology#Scale|scale]] on affected animals. Transmission is mainly by direct contact but the mites can also be transported between animals via a [[:Category:Fleas|flea]] or [[:Category:Lice - Dog|lice]]. It is a zoonotic disease. |
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− | ==Description== | + | ==Mites== |
− | A contagious disease caused by [[Cheyletiella spp.|''Cheyletiella'' sp.]] The mites live on the skin surface causing itching and scale on affected animals. Transmission is mainly by direct contact but the mites can also be transported between animals via a [[Flea Structure|flea]] or [[:Category:Lice - Dog|lice]].
| + | Cheyletiella mites are [[Non-Burrowing Mites|surface mites]] of dogs and cats. |
− | A zoonotic disease.
| + | They are also found on humans and rabbits. They cause Cheyletiellosis, a parasitic skin infestation. |
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− | | + | They have a waisted body and claw like palps on their heads. They also have combs at the ends of their legs. |
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| + | ===Lifecycle=== |
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| + | The lifecycle of a Cheyletiella mite lasts 21-35 days on the host. The adults mites can survive off the host for 2-14 days. They live on the skin surface and their eggs are attached to hair shafts. |
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| + | ===Important Species=== |
| + | ''C.yasguri''- Most commonly found on dogs. |
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| + | ''C.blakei''- Most commonly found on cats and humans. |
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| + | ''C.parasitivorax''- Most commonly [[Mites – Rabbit#Cheyletiella parasitivorax|found on rabbits]]. |
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| ==Signalment== | | ==Signalment== |
| Occurs in dogs, cats, rabbits, humans and wild animals. There is no breed, sex or age predisposition but it is often seen in puppies probably due to management reasons. | | Occurs in dogs, cats, rabbits, humans and wild animals. There is no breed, sex or age predisposition but it is often seen in puppies probably due to management reasons. |
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| ==Diagnosis== | | ==Diagnosis== |
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| A diagnosis can be made on history and clinical signs in combination with demonstration of the parasite. | | A diagnosis can be made on history and clinical signs in combination with demonstration of the parasite. |
− | Scurf can be brushed onto dark paper, 'Walking dandruff' will be seen as mites will move when present in large numbers. | + | Scurf can be brushed onto dark paper and 'Walking dandruff' will be seen as mites will move when present in large numbers. |
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| The parasite can also be identified microscopically from skin scrapings, coat brushes and hair plucking form scaly areas. | | The parasite can also be identified microscopically from skin scrapings, coat brushes and hair plucking form scaly areas. |
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| In dogs hyperkeratosis of the skin occurs and dry, white, scaly dandruff can be seen along the back of the animal. | | In dogs hyperkeratosis of the skin occurs and dry, white, scaly dandruff can be seen along the back of the animal. |
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− | Marked pruritis is sometimes present which in severe cases can be confused as neurological disease. | + | Marked pruritus is sometimes present which in severe cases can be confused as neurological disease. |
− | In cats pruritis is also a common feature with the presence of scale and papules. Miliary dermatitis is a commmon finding normally on the neck | + | In cats pruritus is also a common feature with the presence of scale and [[Skin Glossary - Pathology#papules|papules]]. Miliary dermatitis is a commmon finding normally on the neck or back of the cat. |
− | or back of the cat. | |
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| ==Pathology== | | ==Pathology== |
| Grossly: Focal, multifocal or generalised red papules or crusts occur often along the dorsum of the animal. | | Grossly: Focal, multifocal or generalised red papules or crusts occur often along the dorsum of the animal. |
− | Microscopically: Superficial perivascular dermatitis is present with infiltrating eosinophils. | + | Microscopically: Superficial perivascular dermatitis is present with infiltrating [[Eosinophils|eosinophils]]. |
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| ==Treatment== | | ==Treatment== |
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| All in contact animals should be treated. | | All in contact animals should be treated. |
| The environment the animal has been living in should be cleaned and also treated. | | The environment the animal has been living in should be cleaned and also treated. |
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| Good, will resolve with treatment as long as the animal does not become re-infested. | | Good, will resolve with treatment as long as the animal does not become re-infested. |
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| + | {{Learning |
| + | |Vetstream = [https://www.vetstream.com/canis/Content/Disease/dis02357.asp Cheyletiellosis in dogs]<br>[https://www.vetstream.com/canis/Content/Bug/bug00051.asp Cheyletiella yasguri image] |
| + | |flashcards = [[Mites_Flashcards|Mites Flashcards]]<br>[[Small Mammals Q&A 13]]<br>[[Rabbit Medicine and Surgery Q&A 17]] |
| + | |literature search = [http://www.cabdirect.org/search.html?rowId=1&options1=AND&q1=Cheyletiellosis&occuring1=title&rowId=2&options2=AND&q2=&occuring2=freetext&rowId=3&options3=AND&q3=&occuring3=freetext&publishedstart=yyyy&publishedend=yyyy&calendarInput=yyyy-mm-dd&la=any&it=any&show=all&x=46&y=5 Cheylletiellosis publications] |
| + | }} |
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| ==References== | | ==References== |
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| Foster A.P and Foil C.S (2003) '''BSAVA manual of Small Animal Dermatology'''. 2nd edition. BSAVA. | | Foster A.P and Foil C.S (2003) '''BSAVA manual of Small Animal Dermatology'''. 2nd edition. BSAVA. |
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− | [[Category:To_Do_-_Caz]] | + | Taylor, M.A, Coop, R.L., Wall,R.L. (2007) '''Veterinary Parasitology''' ''Blackwell Publishing'' |
− | [[Category:Zoonotic]] | + | |
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| + | {{review}} |
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| + | {{OpenPages}} |
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| + | [[Category:Zoonoses]] |
| + | [[Category:Expert_Review]] |
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− | [[Category:Cat]] | + | [[Category:Dermatological Diseases - Cat]] |
− | [[Category:Dog]] | + | [[Category:Dermatological Diseases - Dog]] |
| + | [[Category:Dermatological Diseases - Horse]] |
| + | [[Category:Integumentary System - Mite Infections]] |