Table IV. Livability of Day-Old Chicks Sold from Disease-Free Flocks. 



*Chicks lost due to brooder pneumonia, not to bacillary white diarrhoea (state- 

 ment of owner). 



The lowest percentage of livability reported by customers of day-old chicks 

 from bacillary white diarrhoea-free flocks is 55.56. This low livability was due 

 to careless brooding and not to disease. Numerous individual plants have re- 

 X:)orted that 100 per cent of all chicks bought from bacillary white diarrhoea 

 disease-free flocks were raised. 



Of the 156 poultry plants tested for bacillary white diarrhoea infection dur- 

 ing the past season, 57 were tested for the first time. Of the remaining, 99 

 flocks having had some previous testing, 74 plants have a record of consecutive 

 testing extending back two or more years. The following table gives the data 

 from these flocks which are grouped according to the number of years they 

 have been tested. 



Table V. 



Average Percentage Reduction of Infection in Flocks Tested 

 Consecutively for Two or More Years. 



Summary. 



During the 1924-1925 season 66,503 fowls were tested for bacillary white 

 diarrhoea, this being 6,868 more than during the same period last year. Com- 

 pared with last year, the percentage of infection in the flocks tested was reduced 

 from 6.53 to 2^94. Seventy-nine bacillary white diarrhoea free flocks were 

 established, this being 41 more than last year, or an increase of 108 per cent. 

 Livability records of day-old chicks purchased from 25 disease free flocks show 

 that over 94 per cent of the chicks have lived. The season just past has been a 

 most successful one in controlling and eradicating bacillary white diarrhoea 

 infection from the breeding flocks in Massachusetts. 



