Worcester Counties led in the number of tests. In one county (Dukes) no re- 

 actors were found, and all counties but two had less than 0.05 percent reactors. 



The following breeds were tested: Bantam, Barred Plymouth Rock, Brahma, 

 Columbian, Cornish (Black & White), Crosses, Delaware, New Hampshire,' 

 Rhode Island Red, White American, White Leghorn, White Plymouth Rock! 

 Wyandottes (Buff, Silver Laced, White). 



The Rhode Island Red, New Hampshire, and Barred Plymouth Rock were the 

 predominating breeds. Of the total samples 38.57 percent were taken from Rhode 

 Island Red, 31.12 percent from New Hampshire, 22.23 percent from Barred 

 Plymouth Rock, and the balance from other breeds listed. 



Of the 1,312,208 samples collected from females, 55,853 were frgm hens and 

 1,256,355 from pullets, with 0.24 and 0.04 percent reactors, respectively. The 

 132,156 samples collected from males gave 0.10 percent positive tests. 



ANNUAL TESTING OF FLOCKS 



Table 2 gives tne results from flocks tested for the first time, intermittently, 

 for two consecutive years, and for three or more consecutive years. 



In the first year group there were 62 flocks, representing 82,292 tests of which 

 0.009 were positive. In this group 60 flocks, containing 99.66 percent of the 

 birds, were non-reacting and two flocks were positive. The average number of 

 birds per flock was 1,278. 



Table 2.— Annual Testing Versus Single and Intermittent Testing 



In the group tested intermittently there were 30 flocks, representing 44,606 

 tests.^ In this group 29 flocks, containing 98.08 percent of the birds, were non- 

 reactmg and one flock was positive. The average number of birds per flock was 

 1,417. 



In the group tested for two consecutive years there were 40 flocks, representing 

 102,806 tests. Thirty-nine flocks were non-reacting, representing 99.29 percent 

 of the birds tested in this group. The average number of birds per flock was 2,570. 



In the group tested for three or more consecutive years there were 343 flocks 

 representing 1,214,660 tests. The average percentage of positive tests was 0.05.' 

 A total of 337 non-reacting flocks was detected which contained 97.87 percent of 

 the birds tested in this group. Six flocks were positive. The average number of 

 birds per flock was 3,312. 



