1905.] 



Mange in Cattle. 



74 1 



material per 100 lb. of dried product would cost about 4s., and 

 the cost of manufacture is estimated at about is. 6d. 



MM. Muntz and Girard conducted an experiment with a 

 view of testing its suitability for horses in active work. Eight 

 horses belonging to the Paris Omnibus Company were selected, 

 four of which were fed on their usual rations, viz., 19! lb. daily 

 of maize, oats, and beans, mixed with 9 lb. of chaff ; four 

 others received during the first week 17^ lb. of mixed grain, 

 2 lb. dried beet, and J lb. of beans, with 9 lb. of chaff. In the 

 second and third weeks the quantity of dried beet was 

 increased by 2 lb. each week in substitution for an equal 

 amount of grain. During a period of twenty-one days the 

 four horses on the ordinary ration showed a loss in weight 

 of 21 lb. each, while the four receiving dried beet gained 

 9 lb. each. In the fourth week the beet was increased to 

 8 lb. with 1 1 lb. of grain, and nearly 1 lb. of beans, when the 

 horses showed a further gain of 4^ lb. each, and although 

 the proportion of sugar was larger than can usually be fed 

 with advantage, it did not appear that, given in this form, it 

 exercised any unfavourable result on the health of the animals. 



Mange in cattle is a contagious skin disease caused by para- 

 sites belonging to the class of Psoric acari. Three forms of mange 



after the variety of parasite which is the causal agent. Sarcoptic 

 mange in cattle is uncommon, the most prevalent forms being 

 the psoroptic and symbiotic, and these frequently exist together 

 in the same animal. Cows are most often attacked. 



Symptoms. — The most common sites of mange are the root of 

 the tail and the neck, especially the former. The psoroptic form 

 may spread all over the body if treatment is neglected, but 

 this is unusual. The biting of the parasites gives rise to 

 an itchy condition of the skin which causes the animal to rub 

 itself against fixed objects, with the result that the hair over 

 the affected part gets rubbed off. On examining the skin 

 a considerable amount of scurf may be seen ; red and yellow 

 blood scabs occur on the surface, and there may even be 

 abrasions if the animal has been rubbing against rough objects. 



Mange in Cattle. 



occur in cattle, viz., Sarcoptic, Psoroptic, 

 and Symbiotic. These forms are named 



