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AGRICULTURAL bfiAWCH Lb 

 319 BLACKSBURG, VIRGINIA 



Massachusetts 

 agricultural experiment station 



BULLETIN' NO. 319 MARCH 1935 



A Study of Variation of Salmonella 



Pullorum 



By H. Van Roekel 



Bacterial variation has played an important role in bacteriology and related 

 fields of science. From a practical point of view, and particularly in the diagnosis, 

 control and eradication of human and animal diseases, it has presented problems 

 of great importance. Since bacterial variation has received little attention in the 

 study of pullorum disease, it was the purpose of this investigation to add to the 

 knowledge on this subject. 



MASSACHUSETTS STATE COLLEGE 

 AMHERST, MASS. 



