3Hi JO Aavaan 



CONTROL SERIES BULLETIN No. 22 DECEMBER, 1922 



MASSACHUSETTS AGRICULTURAL EXPERIMENT STATION 



CONTROL OF BACILLARY WHITE DIARRH(EA 



1921-1922 



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



The elimination of bacillary white diarrhoea depends on two 

 factors: first, the finding of infected birds in the breeding flock, 

 through the application of a blood serum test; and secondly, the 

 removal of these birds from the breeding flock and the protection 

 of the growing flock from infection. Because of the fact that one 

 without the other is comparatively useless, the Department of 

 Veterinary Science is now requiring that those receiving service 

 under the poultry disease elimination law agree to take certain 

 steps in clearing their flocks of reacting birds, and likewise agree 

 to observe certain simple precautions in keeping their growing 

 flocks free from infection. These conditions are explained in this 

 bulletin, and, in addition, report is given of the operations under 

 the law for the year ending Aug. 31, 1922. 



Requests for bulletins should be addressed to the 



AGRICULTURAL EXPERIMENT STATION 



AMHERST, MASS. 



