Table IV. — Classification of the Sizes of Flocks Tested. 



Table V. — Number of Flocks having Certain Limits of Infection. 



PLAN OF OPERATIONS. 



The great problems of elimination can be solved only by bringing the scientists 

 and poultrymen together to study this problem as a public health procedure. It is 

 the study of an epidemic. Its solution, therefore, calls for two things: (1) scientific 

 knowledge, and (2) action for sanitation and control on the part of the poultrymen. 

 At the present time poultry pathology is long on the one and short on the other. 



The application of scientific principles in the detection of this infectious disease 

 among poultry is well done, because the Experiment Station laboratories, technicians 

 and equipment are used economically and efficiently. To effect results in elimination, 

 however, the poultryman must have a thorough understanding of what he must do 

 to free his flocks of this disease. The first step is teaching every poultryman what a 

 health program for poultry means, and giving to him, before he starts his testing work, 

 information as to the broad principles underlying the problem. The second is to set 

 up effective machinery, through county or state organizations, under the direction of 

 scientific experts, which will educate concerning obligations and opportunities for 

 poultrymen to free their flocks from transmissible diseases and in this way add ma- 

 terially to the conservation of the food supply of Massachusetts. It is therefore with 

 this broad epidemiological vision in mind of bringing the scientific laboratory and 

 the practical poultryman together, each doing his part, that the Experiment Station 

 is asking more of the poultrymen than heretofore. 



Continuing thp testing plans of this present year in the service for the 1923-1924 

 season, each poultryman receiving the services of the Department of Veterinary Science 

 and Animal Pathology of the Massachusetts Agricultural Experiment Station, in 

 performing the agglutination test, is requested to co-operate in eliminating bacillary 

 white diarrhoea from his breeding flocks, and ultimately from his poultry plant, by 

 adopting one of the following plans for testing, and by observing the precautions 

 listed under "Control Measures." 



