418 



DISEASES OF THE BLOOD. 



is indicated by dulness, loss of appetite, and considerable fever. In 

 twenty-four hours the temperature rises to 104° or 105° Fahr., and 

 the pulse to 100 or 120 per minute, while the respiration is greatly 

 accelerated. 



The urine is of a light-red or brownish-red colour, resembling 

 coffee-grounds, but it contains no blood corpuscles. The animals die 

 in frora three to eight days with symptoms of asphyxia ; but this 

 termination is not inevitable, and recovery may occur spontaneously. 

 Improvement is indicated by a fall in temperature, disappearance of 



Fig. 192. — Ventral view of larva of Boojjhilus annularis of North America. Greatlj' 

 enlarged. (Stiles, Ann. Rep., U.S.A. Bur. An. Ind., 1900, p. 388.) 



the blood-stained urine, and a return of appetite, together with marked 

 thirst. 



Drs. Smith and Kilborne describe the symptoms as follows : — " The 

 beast when first observed to be amiss appears to be dull and sluggish, 

 with a disinclination to move, and hence it is generally found apart 

 from the rest of the herd. The hair stands erect like that of an animal 

 on a cold day (a staring coat), the ears hang, and the eyes have a dull 

 and lustreless appearance. In some cases the animals cease to feed, 

 or ruminate, in others they continue to nibble at the herbage until 

 nearly the last, but in a languid, indifferent manner, indicating that 

 they have little relish for their food, and they fall. off very rapidly in 

 condition. There is generally a dribbling of saliva from the mouth, 

 the muzzle may appear quite moist during the early stages of the 

 disease, but it invariably becomes dry and crusty as the disease 



