6o6 Veterinary Medicine. 



daily, before and during infection without any visible effect on 

 the progress of the disease. Methylene blue ( ^ to i ^ dr. ) , 

 saHcylate of soda (yj^ drs. daily), arsenious acid {\% dr. daily), 

 cacodylate of soda (7^ grs. subcutem) were also tried with no 

 good result. The Metropolitan Board of Health, New York, 

 claimed a succession of recoveries -under the use of carbolic acid 

 in the drinking water and sprinkled on the ground so that the 

 animals inhaled it. The cases were, however, the survivors after 

 the first and more acute cases had perished, and the results no 

 doubt depended largely on the mildness of the attacks. The same 

 agent in other hands has not been equally successful. A large 

 number of other agents have been used in vain. 



Among the most important measures are a laxative food, like 

 flax seed gruel, a careful picking of all ticks from the surface, the 

 washing of the skin with a 5 per cent solution of creolin, and the 

 removal of the animals to a tick-free pasture, lot, or building. 

 This at once arrests the introduction into the blood of fresh and 

 continuous accessions of the pyroplasma and, if begun early 

 enough, will determine a mild and nonfatal case. 



Prevention. The prevention of the protozoan cattle fever is 

 based on the life history of the parasite, and may be directed 

 {isf) to the. destruction of the Bobpkilus Annulatus ; or (2nd) to en- 

 creasing the resisting power of the exposed animal, to the Piroplasma 

 Bigeminum. ist. Destruction of the Ticks, (a) On the cattle. 

 The. picking of ticks from the skin is eSe-cthje. \i the object is to 

 make the animal safe for a few days only as the boophilus habitu-. 

 ally clings to the skin of the one ox from the stage of seed tick to 

 that of ovigerous female, ready to drop ofE and lay its eggs. An 

 animal going direct to slaughter may therefore be sent through an 

 uninfested district, even in the hot season with a fair amount of 

 safety, after the careful gleaning of the ticks. The greatest care, 

 however, must be taken to manipulate thoroughly all parts of the 

 skin and above all, the ventral aspect, the inner sides of the limbs, 

 the scrotum, udder and perineum. The animals must be shipped 

 at once after such gleaning of ticks with no further opportunity of 

 taking on a new supply, the cars and other conveyances must be 

 cleaned and treated with acaricides and the litter burned as soon 

 ■ as they are vacated, and the cattle must be passed over no loading 

 banks, chutes nor yards that may by any possibility be used for 

 other cattle unless these are going into a slaughter house. 



