DISEASES OF HORSES AND CATTLE. 385 



and they are supposed to go through the same 

 transformations as some other species. I do not 

 know that either of them have been found in suf- 

 ficient numbers to cause any serious disease in 

 cattle. There are no special symptoms by which 

 we can detect them during life. 



The Strongylus of Horses and Cattle (Strongylua 

 micrurus, also known as Parasitical Bronchitis, 

 Husk or Hoose in Calves). — You will find this 

 worm described on page 365. These worms are 

 said to have been seen in the air passages of horses, 

 mules and asses, but I have found them only in 

 calves and young cattle. If detected in the horse 

 the treatment would be the same as for the calf. 



The Kidney Worm (Eustrongylus gigas). — This 

 is the largest of all the Nematode worms, the 

 females sometimes becoming three feet long 

 and half an inch in diameter, although usually 

 much less. The male becomes ten to twelve inches 

 long and one-fourth of an inch in diameter. 



Habits: "This formidable parasite lives in the 

 kidneys of man and various animals. It has been 

 found in the dog, horse, cattle, hog, wolf, weasles, 

 mink, otter, seal, glutton, racoon, and coati. In 

 this country it has been found quite frequently in 

 the kidneys of the mink. It has been found very 

 rarely in the bladder, in the abdominal cavity, 

 and, it is said, in the heart. In man it is very rare. 

 When lodged in the kidney it gradually, but com- 

 pletely, destroys the substance of the organ, which 

 becomes filled with purulent and bloody matter, 

 upon which the worm feeds, while the walls often 



