it will be most effective and least expensive. It is inexcusable for a poultry breeder 

 to-day to sell pullorum disease stock year in and year out. 



The main burden in the establishment and maintenance of pullorum clean 

 flocks rests with the poultry breeder. The testing agency can identify pullorum 

 infected stock, but it is the flock owner's responsibility to avoid direct or indirect 

 contact between infected and clean flocks. The flock owner who exercises sound 

 prevention measures will be successful in maintaining a pullorum clean flock. 



Table 5. Non- Reacting and Positive Flocks Classified by Counties 



County 



100% Tested 



Flocks 



Partially Tested 



Flocks 



Birds 



Total 



Flocks 



Non-Reacting Flocks 



Barnstable 



Berkshire 



Bristol 



Essex 



Franklin 



Hampden 



Hampshire 



Middlesex 



Norfolk 



Plymouth 



Worcester 



Totals 



Berkshire 



Bristol 



Franklin 



Hampden 



Middlesex 



Norfolk 



Plymouth 



Worcester 



Totals 



12,331 



10.430 



22,761 



Comparison of 1936-37 and 1937-38 Testing 



Table 6 gives a comparison of the 1936-37 and 1937-38 testing results. The 

 numbers of flocks tested in the various counties during the two seasons do not 

 differ greatly, except in Hampden County, which had eleven less than the previous 

 year. However, increases in the number of birds and tests were observed in eight 

 counties. In the majority of counties the average percentage of positive tests 

 was lower than the previous season and in five counties an increase in non-reacting 

 flocks was observed. 



For the State as a whole increases were observed in tested flocks (1), tested 

 birds (31,708), tests (36,007), and non-reacting flocks (5). The average percentage 

 of infection was further reduced from 0.37 to 0.17. 



(8) 



