Difference between revisions of "Psoroptes ovis"

Revision as of 10:52, 9 July 2010

Males attach to deutonymphs (second moult after larval stage) in a process called copula
- Males remain in copula until females moult for the last time
- Copulation occurs

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 *Indirect transmission can also occur
-'''Pathogenesis'''
-*Economically important ectoparasite of sheep
-*Causes '''sheep scab'''
-**Wool loss, restlessness, biting, scratching of infested area and decreased productivity through decreased weight gain
-**Usually seen in '''late autumn''' and '''early winter''' (although may also occur in late summer)
-**Population numbers decline after shearing due to a change in the micro-climate, then build up again as the fleece grows
-**'''Notifiable in UK'''
-*Mites found under scabs and in skin folds
-*Lesions most common on flanks, neck, back and shoulders
-*Causes pruritic condition of cattle
-*Active in keratin layer
-*Mouthparts abrade the skin
-*Antigenic material in mite faeces can lead to hypersensitivity reactions
 [[Category:Sheep]][[Category:Cattle]]
 [[Category:To_Do_-_Max]]