638 SCABIES — SCAB — MANGE. 



limbs becoming swollen so as to suggest lymphangitis. In the folds 

 of the hock and pastern the thickening of the skin may lead to the 

 formation of yellowish or brownish crusts, according to whether 

 the exudation is merely of a serous character or accompanied by 

 bleeding. 



The diagnosis is easy. The parasites are found in the thickness 

 of the crusts, and are readily recognised under the microscope. 



The prognosis is not grave, because of the comparative rarity of 

 the disease and its mildly contagious character. This disease, more- 

 over, never attacks the head or body, but remains localised in the 

 lower portions of the limbs. 



Treatment. The crusts should be removed by washing or by stand- 

 ing the animals for a time in warm water. Simple cleanliness often 

 suffices, but, to save time, some anti-parasitic may be used. The con- 

 dition is easily cured even without disinfecting the folds. 



MANGE IN THE OX. 



Bovine animals may be attacked by three varieties of mange, all 

 of which have long been known. 



SAECOPTIC MANGE. 



This is not of any great clinical importance, as it is purely 

 accidental, and only results from the conveyance of sarcoptes from 

 other animals, such as the horse, sheep, dog, goat or cat, to an animal 

 of the bovine species. That the disease does occur, however, is shown 

 by the following excerpt from a report by Professor McFadyean : 

 The animal showed no symptom of skin disease at the time of pur- 

 chase, but soon after it was brought home it was noticed to be rub- 

 bing, and the skin began to assume an unhealthy appearance. When 

 seen in January (four months after purchase) it was rather poor, 

 although it had been in very good condition when sold. Almost the 

 entire skin had become affected, including that of the legs down to 

 the top of the hoofs. There had been extensive loss of hair, and the 

 skin was thick, grey, wrinkled, and dry. At some places it had become 

 thrown into thick folds. Only a few scabs or crusts had formed where 

 the animal had recently rubbed itself. In some scurf scraped from what 

 seemed to be the parts most recently invaded, numbers of acari were 

 without much difficulty found with the microscope. 



A good many cases of mange of undetermined character have been 

 reported as occurring among cattle in various parts of England during 

 the last year or two, and in a number of instances the disease was 

 believed to have been contracted during exhibition at a show. It is 



