BULLETIN 132 





December, 1903 



Ontario Agricultural College and Experimental Farm 



ROUP : AN EXPERIMENTAL STUDY. 



Prof. F. C. Harrison axd Dr. H. Streit, BACTERioi.cxncAr- Department. 



One of 'the most important poultry diseases in America is fowl dipfitheria, 

 more often called "Roup." It is very widespread ; but it is more prevalent in 

 some places than in others; thus, for example, it is said to be almost un- 

 known in the Canadian Maritime Provinces and in Eastern Ontario, while in 

 Southern Ontario it is the most prevalent disease of fowls. 



F'^- 1- — A section of false membrane of roupy fowl (No. 9). a. The false membrane 

 partly separated from the middle epithelial layer, b. c. Submucosa. d Normal 

 mucous g:lands. 



The views of poultry raisers as to the origin of roup differ very much. A 

 small number trace it to a neglected case of ordinary cold or catarrh, basing 

 their belief on the fact that among fowls livmg under hygienic conditions, 

 1 Bull. 132 



