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→Psoroptes
'''Diagnosis'''
'''Diagnosis'''
*Examination for mites (low magnification)
*Microscopic examination for mites (low magnification)
*Appearance
*Appearance
*Causes '''sheep scab'''
*Causes '''sheep scab'''
**Wool loss, restlessness, biting, scratching of infested area and decreased productivity through a decreased weight gain
**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 iccur in late summer)
**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 microclimate, then build up again as the fleece grows
**Population numbers decline after shearing due to a change in the microclimate, then build up again as the fleece grows
**Notifiable in UK
**Notifiable in UK
'''Diagnosis'''
'''Diagnosis'''
*Skin scraing
*Skin scraping
*KOH added
*KOH added
*Warm slide over a bunson
*Warm slide over a bunsen flame
*Examine under a microscope
*Examine under a microscope