PRAIRIE FARMER'S POULTRY BOOK 



develop under a given stimulus, which may be bacterial in character 

 or the result of some injury. They seem to affect organs of the body 

 which become inactive by reason of age, so that they seldom occur in 

 fowls under one year of age. The Maine Experiment Station reports 

 about nine per cent of cases of tumor in all autopsies made. The ovary 

 is more commonly affected than any other organ. 



Symptoms: Tumors may be benign or malignant. A benign tumor 

 is usually enclosed in a capsule and is harmless because it does not 

 penetrate surrounding tissues. A benign fatty tumor is an illustration. 

 Malignant tumors penetrate the tissues and if removed reappear. They 

 sometimes spread from one organ to another. These tumors attack a 

 number of the tissues of the body. 



Symptoms: The fowl becomes sluggish, appetite is poor, and there 

 is emaciation in some cases. 



Treatment: The real cause and cure are unknown. 



Cancers. Tumors of the epithelial and mucous membrane type are 

 known as cancers. A cancer which involves the squamous epithelial 

 cells of the skin is known as epithelioma. Other types attack the pro- 

 ventriculus, gizzard, intestines, liver, spleen and ovary. 



Treatment: Kill and cremate the diseased fowl for there is no known 

 cure. 



Internal Abscesses are in most cases probably due to infection. 

 If the cause is removed there may be some cases of recovery. 



Corns usually result from bruises and may be caused by narrow 

 perches. 



Normal ovary on left. Ovaiy from hen infected with bacterium pullanum on right 



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