Massachusetts 

 agricultural experiment station 



CONTROL SERIES BULLETIN NO. 138 JULY, 1948 



Twenty-eighth Annual Report of 



Pullorum Disease Eradication 



in Massachusetts 



By the Poultry Disease Control Laboratory 



During the 1947-48 testing season, 605 chicken, turkey, and pheasant flocks 

 were tested. A total of 1,297,111 samples was tested, of which only 0.10 per- 

 cent were positive. The average percentage of infection was slightly !ower than 

 that of the previous season, as was also the percentage of pullorum "breaks" 

 in negative flocks. More outstanding in the progress of eradication is the fact 

 that 96.5 percent of all birds tested were located in 100 percent tested, non- 

 reacting flocks. 



UNIVERSITY OF MASSACHUSETTS 

 AMHERST, MASS. 



