8 



the agglutination test to be reactors be rejected as breeders. The data obtained here 

 indicate that if breeders would attend scrupulously to the details of management 

 after the first test has been made, eradication in a given flock would come after a 

 second test on original stock or a second test on the progeny. 



FLOCK CERTIFICATION. 



If certification of stock be given only to owners of breeding flocks which have shown 

 no indications of bacillary white diarrhoea, and into which no new stock showing 

 reactors by the agglutination test has been introduced, centers of breeding stock 

 would be estabhshed for the dissemination of non-infected hatching eggs and day- 

 old chicks. It should be a rule that new birds would not be admitted to a certified 

 flock except from other certified flocks. Under this plan the department would not 

 enter into the testing work to the end of granting a certificate unless sufficient assur- 

 ance were given that every provision of the plan would be carried out as outUned. 



In conclusion it inight be stated that the results of the 1920-21 season of the ser\dce 

 rendered under the operations of the poultry disease ehmination law have been highly 

 satisfactory under the conditions in vogue during this period. The work has shown, 

 however, that, if it is continued as a purely commercial project, bacillary wliite diar- 

 rhoea will never be held in check or eliminated. Real ser\dce under the law as worded, 

 "poultry disease elimination law," can come only through scientific efforts, executed 

 by scientific men in a scientific institution, and not through a commercial estabhsh- 

 ment. 



