10 



REDUCING INFECTION. 



Table VIII exhibits data showing how infection from Bacterium pullorum may be 

 eHminated b\'- testing the original birds, the progeny, and the progeny of the progeny, 

 which indicates that ehraination is possible only after a series of tests. 



Table VIII. — Reduclion of Infection, as Determined by Testing Work on Fourteen Dif- 

 ferent Flocks, 1922-1923. 



* The original flock was not tested until 1922; the te.st on the progeny of progeny has not yet been made. 



SUMMARY. 



During the season 1922-1923, 3,727 more breeding birds were tested than in any 

 previous season. More sections of the State were visited and the percentage of infec- 

 tion in the breeding flocks was reduced. More Bacterium puUorum-hee flocks were 

 established, and as a result of the testing work the livability of chicks furnished to 

 poultry farms from bacillary white diarrhoea- free flocks was increased from about 15 

 to 20 per cent to an average of over 90 per cent. These figures are based on actual 

 returns from bu3'ers, and are therefore significant. 



Publication of this Document 



approved by the 



Commission on Administration and Finance. 



