Table 3. Incidence of "Breaks" Observed During the 

 Past Seventeen Years 



5. The poultry houses, runs, and equipment should be thoroughly cleaned 

 and disinfected immediately after removal of reactors. An empty pen to each 

 house should be provided to facilitate cleaning and disinfection during the winter 

 months. Disinfectants approved by the United States Department of Agriculture 

 should be used. 



6. Birds removed from the premises to egg-laying contests, exhibitions, etc., 

 should be held in quarantine and determined free of disease before they are read- 

 mitted into the flock. 



7. Purchase of stock in the form of adults, chicks, and eggs should be from 

 known pullorum disease-free flocks. The Massachusetts Department of Agriculture, 

 41 Tremont Street, Boston, should be consulted regarding additions or replace- 

 ments in the flock. 



8. Eggs should not be saved for hatching until after a flock has been tested 

 and all the infected birds removed. Early pullet testing will permit early hatching. 



9. Fresh and infertile eggs from unknown or infected sources should not be 

 fed to chickens or exposed to birds or animals, such as crows, sparrows, and skunks, 

 that may carry or spread the infection. 



10. Poultrymen should not custom-hatch for untested or infected flocks (includ- 

 ing fowl other than chickens). 



11. Owners of pullorum disease-free flocks should not permit hatching where 

 infected eggs or stock may be found. 



12. Poultrymen should not buy feed in bags that have been used or exposed 

 to infection. (Such bags if properly disinfected will be safe for further use.) 



