334 FARM ANIMALS 



live on for several days, recovering in a small 

 percentage of cases, or more often strangling to 

 death as the false membrane which characterizes 

 the disease forms and thickens in the larynx and 

 windpipe. When roup is first noted it may be 

 treated by removing all of the false membrane with 

 a dull knife or a small stick and treating the affected 

 surfaces with lunar caustic after which the mouth 

 and nose may be washed with a solution of nitrate 

 of silver at the rate of eight grains in an ounce of 

 water. The success from any method of treating 

 roup, however, is not very comforting to the poultry 

 raisers. In California and at Cornell University 

 a large series of remedies have been tried and many 

 of them proved to be quite ineffective after they 

 had apparently given good results in a number of 

 cases. Many birds are relieved or cured by dipping 

 their heads in kerosene, a weak solution of perman- 

 ganate of potash may be used in the same way. 

 Prevention is the important factor in controlling 

 this disease, however. The essential element of 

 prevention consists in the isolation of all diseased 

 birds and the removal of the uninfected ones to 

 clean quarters. 



Occasionally quite serious outbreaks of tubercu- 

 losis occur among poultry. Strangely enough this 

 disease has been recently found quite extensively 

 in California. There is of course no satisfactory 

 treatment for this and reliance must be placed upon 

 sanitary, cleanly quarters and other methods of 

 prevention. The disease known as leukemia some- 

 times affects fowls and causes them to stand in a 

 crouched position for long periods. They show 

 a high fever but usually no diarrhea. This appears 

 largely to be confined to the small intestines and 

 is highly contagious. In many cases the appetite 



