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==Description==

==Description==

An inflammatory parasitic disease of dogs and cats caused by [[Demodex]]. The mites are host-specific and can occur in dogs, cats, cattle, sheep, goats, pigs and horses. They live in hair follicles and infestation may lead to secondary bacterial infection and furunculosis.  

An inflammatory parasitic disease of dogs and cats caused by [[Demodex]]. The mites are host-specific and can occur in dogs, cats, cattle, sheep, goats, pigs and horses. There has to be increased numbers of immature mites to classify as an infestation. The mite is transmitted from dam to offspring during nursing.

They live in hair follicles and infestation may lead to secondary bacterial infection and furunculosis.  

==Signalment==

==Signalment==

Commonly affects the dog and more rarely the cat.  

Commonly affects the dog and more rarely the cat.  

'''Breed predilections'''

'''Breed predilections'''

Demodicosis is usually a disease of short haired dogs and is more common in pedigree breeds. Within breeds, the Staffordshire bull terrier, German Shepherd dog, Old English Sheepdog, Collies and dalmations are at risk.Additionally it has been reported that there is an increased incidence in Siamese and Burmese cats.

Demodicosis is usually a disease of short haired dogs and is more common in pedigree breeds. Within [[Canine Breeds - WikiNormals|dog breeds]], the Staffordshire bull terrier, German Shepherd dog, Old English Sheepdog, Collies and dalmations are at risk.Additionally it has been reported that there is an increased incidence in Siamese and Burmese cats.

 

'''Age predilections'''

'''Age predilections'''

Often animals less than 12 months of age of affected although adult onset is recognised.  

Often animals less than 12 months of age of affected although adult onset is recognised.  

==Pathogenesis and epidemiology==

==Pathogenesis and epidemiology==

[[Demodex|''Demodex'']] are normal inhabitants of hair follicles and sebaceous glands but there has to be increased numbers of immature mites to classify as an infestation. The mite is transmitted from dam to offspring during nursing.

[[Demodex|''Demodex'']] are normal inhabitants of hair follicles and sebaceous glands but *''Demodex canis'' in dogs can be generalised or localised

*''Demodex canis'' in dogs can be generalised or localised

  ([[Adrenal Glands - Pathology#Adrenal Hyperfunction|hyperadrenocorticism]], [[Thyroid Gland - Pathology#Hypothyroidism|hypothyroidism]])

  ([[Adrenal Glands - Pathology#Adrenal Hyperfunction|hyperadrenocorticism]], [[Thyroid Gland - Pathology#Hypothyroidism|hypothyroidism]])