10 



Table 6. Twenty-Nine Year Pullorum Disease Testing Summary 



♦Based on total birds tested: 1927-28, 190,658 birds; 1928-29, 254,512 birds. 



COMMENTS AND SUGGESTIONS 



Annual Testing of All Birds on the Premises: During the past year 108 

 flocks, which were tested in 1947-48, dropped out of the testing program. Some 

 of these flocl<s were liquidated and others were not used for the purpose of pro- 

 ducing hatching eggs. It is realized that one should not expect a flock owner to 

 test his flock if he does not plan to produce hatching eggs. However, it should be 

 emphasized that a flock of this type should be carefully protected against the 

 possible introduction of pullorum infection. The "in and out" flocks can be 

 safeguarded against pullorum infection through careful vigilance in keeping out 

 pullorum disease, and by replacing untested birds with pullorum-clean stock. 

 If such precautions are taken, the owner has reasonable assurance that his flock 

 will be found free from infection when tested for the purpose of producing hatch- 

 ing eggs. 



During the past year 14 flocks, representing 10,081 birds, were partially 

 tested. As has been pointed out in the past, partial flock testing does not de- 

 termine the true pullorum status of all the birds on the premises. It is hoped 

 that sometime all flocks will be 100 percent tested so that if no reactors arc de- 



