DISEASES OF THE HOESE. 551 



will be found to have fallen to normal or nearly so; the animal will 

 present a brighter aspect, and there is every appearance of its return 

 to health; but in a few da3^s the animal again appears dull and half 

 asleep; the temperature becomes elevated, and a relapse takes place, 

 and a repetition of all the symptoms in the primary paroxj^sm, includ- 

 ing the reappearance of the parasite, is observed. 



DIAGNOSIS. 



Certain symptoms (anemia, fever, petechias, ravenous appetite, 

 extreme emaciation, high mortality, etc.) would naturally give rise to 

 a suspicion of surra. The positive diagnosis should, however, be made 

 with a microscope. In case of suspected surra no delay in confirming 

 or disproving the suspicion should be permitted. 



TREATMENT. 



No satisfactory treatment is known. Intravenous injections of 

 Fowler's solution of arsenic give temporary relief, but relapses occur. 

 In view of the great economic importance of this disease, it would 

 not be advisable to attempt to treat any sporadic cases should they 

 occur in this country. On the contrary, the animals should be slaugh- 

 tered immediately and their carcasses promptly burned. 



