Changes

==Description==

==Description==

A contagious disease caused by [[Cheyletiella spp.|''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 [[Flea Structure|flea]] or [[:Category:Lice - Dog|lice]].  

A contagious disease caused by [[Cheyletiella spp.|''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 [[Flea Structure|flea]] or [[:Category:Lice - Dog|lice]].  

A zoonotic disease.

A zoonotic disease.

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.

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.

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.

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.

==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]].

==Treatment==

==Treatment==