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Changes
→Non-Burrowing Mites
*Less pathogenic than ''Psoroptes''
*Less pathogenic than ''Psoroptes''
**Mouthparts cannot pierce the skin
**Mouthparts cannot pierce the skin
*3 week life cycle
'''Recognition'''
'''Recognition'''
*Cup shaped suckers on '''unsegmented''' pedicels
*Cup shaped suckers on '''unsegmented''' pedicels
*Females about 300μm in length
'''Pathogenisis'''
'''Pathogenisis'''
**Rubbing and scratching
**Rubbing and scratching
**Hide damage
**Hide damage
**Usually affects the base of the tail, perineum and udder
*Usually found on legs of sheep
*Usually found on legs of sheep
===''Otodectes cynotis''===
===''Otodectes cynotis''===
*in [[Parasitic skin infections - Pathology#Otodectic mites|otodectic skin infestation]]
*in [[Parasitic skin infections - Pathology#Otodectic mites|otodectic skin infestation]]
*Commonest mange of dogs and cats in the world
*Inhabits the inner ear
*Also found in the fox and the ferret
*Closed chitnious bars ('''apodemes''') on ventral surface
*3 weel life cycle
*Feeds on ear debris
'''Pathogenesis'''
*Only a few cats show symptoms
**Tranmission occurs whilst kittens are suckling
*Common cause of '''otitis externa''' in dogs
*Brown waxy exudate produced
*Can lead to secondary infection
*Clinal signs apparent
**Head shaking, ear scratching and aural haematomata
'''Treatment'''
*Ear drops
**Massage base of ear to disperse drops after treatment
*Most treatments need to be repeated in 10-14 days to kill newly hatched mites
*Selamectin can be used as a spot-on treatment
**Prolonged duration of action
*Treat all in-contact animals
**These may be asymptomatic carriers
===''Cheyletiella'' sp.===
===''Cheyletiella'' sp.===