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− | ===Demodicosis=== | + | ===[[Demodicosis]]=== |
− | *[[Demodex|''Demodex'']] are normal inhabitants of hair follicles and sebaceous glands
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− | *Have to have increased number of immature mites to classify as infestation
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− | *Host-specific
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− | *Occurs in dogs, cattle, sheep, goats, pigs, horses and cats
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− | *Transmits during nursing from dam to offspring
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− | *''Demodex canis'' in dogs:
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− | **Generalised or localised
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− | **Mainly young dogs affected or adults with other disease ([[Adrenal Glands - Pathology#Adrenal Hyperfunction|hyperadrenocorticism]], [[Thyroid Gland - Pathology#Hypothyroidism|hypothyroidism]])
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− | **Often inherited in pure bred
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− | **Grossly:
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− | ***Localised: scaly, erythematous, macular, alopecic areas; usually face or front legs
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− | ***Generalised: large, coalescing lesions, patches, erythema, alopecia, scales, crusts
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− | **Microscopically:
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− | ***Localised: lymphoplasmacytic perifolliculitis with hyperkeratinisation, sebaceous adenitis, low pigment, intraluminal mites
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− | ***Generalised: perifolliculitis and follicular hyperkeratosis, follicular pluggingf, bacterial proliferation, bacterial neutrophilic folliculitis
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− | ****May cause folliculat rupture -> furunculosis, cellulitis, lymphadenitis and septicaemia
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| ===Notoedric mites=== | | ===Notoedric mites=== |