No. 6. DEPARTMENT OF AGRICULTURE. 163 



MISCELLANEOUS PRODUCTS EXAMINED BY LABORATORY, 1915 



c 



PARASITIC DISEASES 



The parasitic diseases of animals should receive more attention 

 than they have in the past. It is. strange that owners seldom give 

 any attention to internal parasites except worms and bots in horses 

 and these are of practically no importance. Much more trouble is 

 caused in horses by the various worm and bot remedies than by the 

 parasites themselves. 



Lung worms in calves and lung worms and stomach worms in 

 sheep are important. Young animals are often killed by these para- 

 cites and if proper measures are not adopted a large part of the 

 calf and lamb crop will be lost. In calves these parasites live in the 

 wind pipe and its branches and they cause a form of bronchitis or 

 what is sometimes called hoose. It is most liable to occur in the 

 late fall and the owner frequently reports that his calves were left 

 out in bad weather and caught cold. They cough and have a mucous 

 frothy discharge from the nose, lose flesh rapidly and may die in 

 the course of a few days. 



In lambs somewhat similar symptoms may be observed from lung 

 worms, yet they are more liable to be affected with the stomach 

 worm or both varieties. If so they become unthrifty, poor in flesh, 

 pot bellied, mucous membranes are pale and bloodless, the bowels 

 are loose and death is quite sure to follow. 



These parasites are about the diameter of a hu'nnu liair and less 

 than an inch in length. They can be seen easily with the naked eye 

 in the mucous in the lung or mixed in with the contents of the 

 stomach. They are more likely to be propagated and spread on wet 

 pastures and they will remain alive from year to year on the same 

 premises unless measures are adopted to destroy tliem. 



The following table shows some of the Darnpitic diseases, their 

 hosts, etc., found in specimens sent to the laboratory : 



