Pullorum Testing 



Testing of poultry for pullorum disease in the State is done by the 

 Poultry Laboratory at the University- During the fiscal year, 1.512,219 

 birds were tested by means of the tube-agglutination test. In addition. 

 39.203 retests were made, thus giving a total of 1,551,422 samples tested 

 for the year. 



Of 502 flocks tested, one was found to harbor infection. Thus 0.19 

 percent of the flocks under test were infected. 



F. E. Allen, A. C. Corbett, A\\ R. Dunlop 



Infectious Bronchitis Virus 



The Poultry Laboratory has continued to grow infectious bronchitis 

 virus on embryonating eggs, and after being tested for puritv and potency 

 it is sold to poultrymen of the State for inoculation of their susceptible 

 birds. During the fiscal year, 985 lots of this virus were supplied to New 

 Hampshire poultrymen. 



F. E. Allex. a. C. Corbett. ^^^ R. DrxLOP 



National Poultry Improvement Plan 



Participation in the various phases of the NPIP work continued to 

 show a decline from the previous year. However, a study of the figures 

 in the table below shows that the size of the hatching-egg producing flocks 

 is increasing steadily- Since this ofiice is primarily interested in the breed 

 stages of the Plan, it is interesting to note that in 1953. 84 percent of the 

 flocks were participating in the breed stages. This compares with 75 per- 

 cent in 1952 and only 20 percent in 1944. 



Record of Performance work also contitiued to decline from a high 

 of 14 participating flocks in 1947 to a low of 6 in 1953. Here again, those 

 breeders that have continued in the trapnest work are trapping more birds 

 and have more individual mating pens per farm. 



E. T. Bard well 



35 



