

CONTROL SERIES BULLETIN No. 23 SEPTEMBER, 1923 



MASSACHUSETTS AGRICULTURAL EXPERIMENT STATION 



CONTROL OF BACILLARY WHITE DIARRH(EA 



1922-1923 



By G. E. Gage and O. S. Flint 



The control work of the Massachusetts Agricultural Experiment 

 Station with reference to the elimination of bacillary white diar- 

 rhoea of poultry is now centered around the attempt to establish 

 ** disease-free flocks" from which day-old chicks and hatching eggs 

 may be obtained. The results of the work completed in the testing 

 season ending July 1, 1923, together with the evidence of improve- 

 ment brought to the poultry industry of Massachusetts, through 

 the effective use of the macroscopic agglutination test as a con- 

 trolling agent, are set forth in this bulletin. 



Requests for bulletins should be addressed to the 



AGRICULTURAL EXPERIMENT STATION 

 AMHERST, MASS. 



