344 BUILDINGS, SANITATION, AND DISEASES 



The coal-tar dips, such as chloro naphtholeum, zenoleum, 

 and others of this class, give good results, and are more con- 

 venient when a small number of animals are to be treated. 



It is very important that the animals be kept wet with the 

 solution until all the scabs are thoroughly soaked through, 

 and it is a good plan to scrub with a stiff brush to remove as 

 much as possible of the scabs. Two thorough treatments, ten 

 days apart, are necessary. 



Pens should be thoroughly cleaned and disinfected. Sows 

 should be treated as well as the young pigs, though the disease 

 may not show to any extent on the older pigs. The disease is 

 transmitted by contact, and the young pigs almost invariably 

 become infected through coming in contact with a diseased 

 mother. 



INTESTINAL WORMS. 



Common Round Worm The most common intestinal 

 worm affecting swine is the round worm, which is found 

 mainly in the small intestine. If a post-mortem examination 

 is made some time after death, the worms may be found in 

 the stomach, having made their way there after the death of 

 the animal. The worms vary from six to eleven inches in 

 length, and taper somewhat towards the extremities. In color 

 they are usually a yellowish white. The eggs of the female 

 pass out with the excrement and become scattered over the 

 premises. Eventually, some of them are taken up by other 

 hogs along with their feed. 



They do not seem to cau'se the hog any inconvenience unless 

 they are present in very large numbers, when they may cause 

 digestive troubles, and the writer has known death to result. 

 There can be little doubt, however, that a pig affected with 

 worms cannot make the best use of its feed, even though it may 

 appear quite thrifty. 



