isolated from any of the reactors. If the organism is isolated from ene 

 or more of the reactors, all the questionable birds are considered as in- 

 fected. 



Anotlier service established during the 1928-29 season was that of 

 telephoning the results of the test. When the owner agreed to pay the 

 toll charges, the results of the test were telephoned as soon as they were 

 available. This was recommended to hasten the removal of infected birds. 

 During the 1928-29 season, 55 poultrymen requested this service and 66 

 telei)hone calls were made to tliis group. 



To obtain information on the role that fowl otiier than chickens play 

 in the transmission of pullorum disease, free service was given to poultry- 

 men desiring to test turkeys, geese, and ducks. This service is discussed 

 later. 



Applications received 435 



Applications cancelled at owner's request 21 



Applications cancelled for non-paj^ment of previous accounts 1 



Flocks tested 413 



Tests made' 304,092 



Birds tested 254,512 



Personal conferences held with visitors at the laboratory 



from August 1, 1928 to March 1, 1929 131 



Autopsies performed to check suspicious reactions 75 



Poultrymen requesting and receiving telephone service 55 



Distribution By Breeds, of Tests and Reactors 



A summary of the number of tests made in each breed is given in 

 Table 1. The data in this table were compiled from the actual number 

 of birds tested and not from the total tests made. . The difference between 

 total tests made and number of birds tested was 49,580. These represent 

 the number of retests made in flocks where an intensive retesting plan of 

 eradication was followed. Details of the results of testing fowl other 

 than chickens, which are included under the miscellaneous group, are 

 given under another heading. 



Little change from 1927-28 in the percentage of total birds in the 

 various breeds has occurred, and Rhode Island Reds have continued to be 

 the most popular breed. Comparison of the data in Table 1 with similar 

 data given in Table 1 of Control Bulletin 43 (the 1927-28 report), shows 

 that an appreciable reduction in the average percentage of infection is 

 reported for every breed. The average percentage of infection for all 

 birds tested was 6.52 in 1927-28, as compared with 4.25 per cent in 

 1928-29. Thus the average percentage was reduced 2.27 per cent. When 

 one considers that 63,854 more birds were tested in 1928-29, this decrease 

 can be considered a reliable indication that eradication is being accom- 

 plished. 



^ To obtain further information on the proper age to test pullets, and on the possibil- 

 ities of eradication of pullorum disease by an intensive retesting program, several easily 

 accessible flocks were retested free of charge. The total number of such tests plus the 

 total number of tests on fowl other than chickens was .'5,323. The number of routine testa 

 for which charges were made was 298,700. 



