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MASS. EXPERIMENT STATION BULLETIN 163. 



Chart showing Results of Agglutination Tests, etc. — Concluded. 

 District 10 — Concluded. 



DiSTEIBUTION OF INFECTION AND TyPES OF StOCK INFECTED. 



A study of the map and chart indicates that the infection is distributed 

 throughout Massachusetts. It should be borne in mind, however, that 

 this represents the work of but a short time on representative breeding 

 flocks. A further study conducted along the same lines would undoubtedly 

 result in furnishing data which would indicate that there exists throughout 

 the State a general infection. 



We have realized that there are several types of poultry work conducted 

 in Massachusetts, i.e., the management of poultry plants along lines best 

 suited to the rearing of utility and fancy stock. In the data we are report- 

 ing are included the results from tests made on both types. Many poultry- 

 men will say that they have bought their stock from the best that can be 

 had, but this is no protection against infection. In way of illustration we 

 might say that it has been the good fortune of the Department in the 

 spring of 1914 and 1915 to be associated with some of the most practical 



