170 SHEEP DISEASES. 



known. According to some investigators, the 

 worms deposit their ova in the air passages of 

 the infected animal, and the embryos are expelled 

 either through the sneezing of the animal, or 

 through the feces. They can live in several in- 

 termediate hosts, such as the angleworm, and 

 when a sheep or a lamb eats or drinks in the in- 

 fected locality, the parasite reaches the air pas- 

 sages. Here again they pass through another life 

 cycle, which is repeated with startling rapidity. 



Symptoms: The evidences of this ailment are 

 most pronounced in lambs, and depend upon the 

 number of parasites present. First, there is a 

 pronounced anemia, commonly known as "paper- 

 skin. ' ' A broncho-pneumonia is next seen, accom- 

 panied by a short, hacking cough. The nose is 

 rubbed on a log, and the victim breathes with diffi- 

 culty. Toward the last, a diarrhea sets in, and 

 the animal staggers around, until it falls to the 

 ground, never again to rise. 



Treatment: This is useless when the lungs 

 are infested, or the disease in the last stage. If 

 the worms are in the trachea, one dram of gaso- 

 lin may be injected intratracheally. 



Prevention is far more satisfactory than 

 treatment of affected animals. Separate the 

 healthy from the sick, and keep on high ground. 

 Infested pastures should not be grazed for a year 

 0r two. The disease is seen at its worst in the 

 fall, following a wet summer. 



