THIRTY-ONE-YEAR TESTING SUMMARY 



Table 6 is a summary of the testing results for the thirty-one years of testing. 

 It is encouraging to note that Massachusetts flock owners are successful in estab- 

 lishing and maintaining pulloruoi-free flocks. 



Table 6. Thirty-one 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: Annual testing of all birds on 

 the premises is required by the Massachusetts regulations for official recognition. 

 The true pullorum disease status of a flock cannot be determined by testing only 

 part of the flock. Among the 475 flocks tested the previous season, 19.79 percent 

 were not tested in 1950-51. Intermittent testing is conducive to the establish- 

 ment of infection in flocks. In such instances the flock owner will sufi'er economic 



