SCABIES OF CATTLE, OR MANGE. 917 



This variety dig galleries under the outer layer of the skin and live on 

 the cells of the middle layer of the skin. They multiply in these galleries 

 and occasion a very intense inflammation of the skin. Because of the 

 depth to which the Sar copies burrow Sarcoptic mange is exceedingly hard 

 to eradicate. It would, therefore, seem fortunate that this form of the dis- 

 ease is not common to cattle. It is rebellious to all medication, and very 

 frequently recurrences of the disease are seen after treatment which has 

 been prolonged for months. 



III. Transmissibility of Mange. 



Concerning the transmissibility of the different manges to animals and 

 man, we find that all Sar copies may live for a considerable period upon 

 man's skin, but the common mange mites, the first variety described, and 

 the tail-mange mites, the second variety described, die very rapidly and 

 occasion but slight irritations. The horse may contract Sarcoptic mange 

 of the sheep, pig, dog, and cat. The ox takes the Sar copies of the horse, 

 sheep, goat, and cat. The sheep contracts Sarcoptic mange of the goat. 

 The dog takes the Sarcopies of man, pig, cat, sheep, and goat. The pig 

 contracts Sarcoptic mange of the goat. From this it will be seer; the Sar- 

 coptic mange, unlike the common and tail manges, is transmissible from 

 one species of animal to another. 



IV. Disinfection. 



"What has already been said with regard to the contagious character of 

 scabies in cattle — of the number of scab mites which may be found in a 

 small quantity of the debris of the skin and their ability to live and remain 

 active for a considerable length of time under unfavorable conditions — 

 will indicate the importance of the thorough disinfection of corrals, sheds, 

 or other buildings in which affected cattle may have been kept. It is 

 therefore necessary, in order to attain success in the treatment of this dis- 

 ease, to destroy parasites which have fallen off or have been dislodged from 

 the animals, as well as those that are upon them ; otherwise there is danger 

 of their becoming reinfected from the premises after the effects of the rem- 

 edy applied to the animals have disappeared. 



V. Treatment. 



Methods in operation for the treatment of scabies in sheep have become 

 more or less familiar to all people interested in sheep husbandry, and it 

 may be said that the same treatment so successfully applied in ridding 

 sheep of scabies has been found equally efficacious in the treatment of 

 scabies of cattle. 



During the past few years many thousands of cattle have been success- 

 fully treated for mange in different States of the Middle West and Middle 



