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==Burrowing Mites==
 
==Burrowing Mites==
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===''Sarcoptes''===
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===Sarcoptidae===
*In [[Parasitic skin infections - Pathology#Scabies|scabies]]
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====''Sarcoptes''====
   −
===''Knemidocoptes''===
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'''Recognition'''
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*Small, round mite
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*Short legs
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**Project only a short distance from body margin
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*Dorsal spines
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**Arranged in rows
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*Dorsal spines
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*Terminal anus
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'''Life Cycle'''
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*3 weeks life cycle
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*Female lays eggs in epidermis in an '''egg laying pocket'''
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*Female feeds on liquid ozzing from damaged tissue
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*The eggs hatch in 1 week
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*'''6 legged''' larvae released which crawl to skin surface
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*The larvae then burrow back into the epidermis into '''moulting pockets'''
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*Larvae moult to become '''8 legged''' nymphs
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*Nymphs moult twice before becoming adults
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*Adult males emerge and look for females for mating
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'''Transmission'''
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*Close contact
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*Adults and larvae can be transferred from one skin surface to another
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'''Pathogenesis'''
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*Erthema with papule formation
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*Scale and crust formation
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**Alopecia
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*Intense pruritis for one week
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**Self-inflicted trauma
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**Scab formation
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*Wrinkling anf thickening of skin
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*Hypersensitivity may develop
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**Rash develops
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*''Sarcoptes scabiei
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**In [[Parasitic skin infections - Pathology#Scabies|scabies]]
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*Strains of ''S. scabiei'' can be passed between different animals and cause clinical signs although the infection is likely to resolve spontaneously and be unlikely to establish
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'''Sarcoptic Mange'''
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'''Diagnisis'''
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*Skin scraping until capillary blood appears
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**Adults, eggs, immature mites and faecal pellets looked for
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*Place material on a microscope slide
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*Add 10% KOH
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*Warm slide over bunson flame
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'''Treatment'''
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*Acaricide
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**For more information on acaricides click here
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*Treat both infected and in-contact animals
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*Older products have to be given in repeat treatments
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*Avermectins are effective in farm animals
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*Selamectin is available as a good spot-on for dogs
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*Control for pigs:
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**Treat sows before entering the farrowing pen
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**Treat boars at 6 month intervals
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====''Knemidocoptes''====
    
*'''K. mutans'''
 
*'''K. mutans'''
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