bacillary white diarrhoea. On these places there are 9,260 breeding birds composed of 

 White Rocks, Rhode Island Reds, Barred Rocks, White Leghorns, Buff Orpingtons, 

 and White Wyandottes. These clean flocks are located in Hampden, Hampshire, 

 Frankhn, Norfolk, Bristol, Worcester and Middlesex counties. 



It has been difficult to get clear line data on many flocks known to have the infec- 

 tion, since many poultrymen are careless about bujang untested breeding stock even 

 after a test has been made. This sort of thing will undo all our efforts to assist such 

 poultrymen to eliminate the disease. However, there are flocks harboring heavy in- 

 fection where attempts have been made to carry the test through with the anticipation 

 of eliminating the disease. The following table, classifying 15 places, is of interest : — 



Table VI. Reduction of Percentage Infection as determined by Testing 

 Work, 1920-21, in 15 Different Flocks. Selected as representing Accom- 

 plishment in Elimination in Heavily Infected Flocks. 



It can be readily seen from the table that it is not an easy matter to rid flocks 

 of this disease, especially if the original infection is great. It is always a question what 

 avenue to suggest for a poultryman to follow in order to attain success, — whether 

 it shall be elimination of all birds showing heavy infection, or that he stay with the 

 testing through subsequent tests upon the progeny, and progeny of the progeny. It 

 has been urged by the State authorities in Connecticut that if immediate relief is 

 desired a tested flock in which more than 2 per cent of the birds have been shown by 



