Table 3. The Ineidenee of '"Breaks" Observed During the 

 Past Fifteen Years 



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.) 



13. Poultrymen should regard fowl other than chickens as a possible source of 

 pullorum infection unless tested and found free from pullorum disease. 



14. Poultrymen should not use equipment that has been exposed to or con- 

 taminated with infective material unless it is properly cleaned and sterili7.e<l or 

 disinfected. 



