SCABIES— MANGE— SCAB 263 



cases (scabs hard and dry) or if dips have been used the mites 

 are not numerous. 



Prognosis. — The prognosis in sheep scab is generally good, 

 provided prompt and effective remedial measures are taken. 



Treatment. — The treatment consists in dipping the whole 

 flock in some solution which will destroy the parasites. 

 Several solutions are recommended for this puropse: 



(a) Lime-sulphur dip, made by mixing eight pounds of 

 fresh quicklime and twenty-four pounds of sulphur and boil- 

 ing with thirty gallons of water for not less than two hours. 

 All sediment should be allowed to subside before the liquid 

 is placed in the dipping vat. Before using this mixture it 

 should be diluted with water to make 100 gallons. 



(b) Tobacco-sulphur dip which is made with the extract 

 of tobacco or nicotin. The strength of the mixture should be 

 not less than 0.05 per cent, nicotin and 2 per cent, flowers of 

 sulphur. For the first dipping of infected sheep the mixture 

 should contain no less than 0.07 per cent, nicotin. 



(c) Coal-tar preparation to 50 to 75 parts water. Dipping 

 solutions should be warm (110° F.). 



Sheep should be immersed at least once and should remain 

 in the solution for at least two minutes. It is best to dip 

 after shearing. Ten days later the entire flock should be 

 dipped a second time. After dipping the flock should be 

 placed where no scabby sheep have been for at least four or 

 five weeks. 



Sarcoptic Mange of Sheep. — As this form of mange does not 

 usually invade the wool-covered portions of the skin it is 

 found mostly on the head about the lips, nose, face and ears. 

 It is therefore known as "head mange." More rarely it 

 involves the flexion surfaces of the carpi and tarsi. 



Symptoms. — The symptoms are similar to those noted in 

 the horse. Small papules, vesicles, and pustules appear which 

 rupture and dry to form thin and later thick gray scabs; 

 from rubbing the skin becomes swollen and creviced. 



Prognosis. — The prognosis is good if treated early. In 

 some cases the sheep are unable to eat. 



Treatment. — Treatment is the same as for sarcoptic mange 

 in the horse. 



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