Sheep Chorioptic Mange Sheep

llamedos

New Member
you should be aware that some of the details may have changed since publishing

Chorioptic mange is a potentially important cause of poor breeding soundness in rams, characterised by superficial, exudative, fissured lesions on the lower third of the scrotum. Handling of the scrotum often initiates a nibble response. Irritable areas of hair loss, skin thickening, exudation and scab formation are also sometimes seen on the lower limbs and poll of both ewes and rams. The disease is caused by the sheep-adapted mange mite, Chorioptes bovis and the skin lesions are associated with a hypersensitivity reaction.



Fig 1 Mange lesions on the scrotum of a Suffolk ram


Fig 2 Severe exudation of the lower limb of a Suffolk ram


Fig 3 Mange lesion of the poll of a Shetland ram
The diagnosis of chorioptic mange is usually based on the clinical signs, but can be confirmed by the identification of mites in superficial skin scrapings. Mites are only present in small numbers, so scrapings from several animals and from several sites are required.

The re-emergence of chorioptic mange in British sheep is probably associated with the withdrawal of compulsory plunge dipping for the control of sheep scab. Systemic endectocides appear to be ineffective for the control of scrotal mange, probably due to the feeding behaviour of the mite. Overseas, prevention and treatment is usually achieved by the topical application of an organophosphate dip. Your vet can provide advice about the significance and management of chorioptic mange in your flock.
 

Forum statistics

Threads
192,602
Messages
4,406,095
Members
48,283
Latest member
Libbygriffiths

Vote on the future of AHDB Horticulture

  • 79
  • 0
Vote on the future of AHDB Horticulture

Have your voice heard. Should the Horticulture levy continue?

1611161549253.png

A ‘yes’ is a vote for change and a ‘no’ could see the end of a statutory levy. I encourage you to consider the facts and to use your vote. At a time of immense change, the loss of a central organisation that invests in applied research for the benefit of all would be a considerable loss
Nicholas Saphir, AHDB Chair

A vote ‘Yes’ means A vote ‘No’
KEEPING fast-tracked crop...
Top