THIRTY-EIGHT-YEAR PULLORUM DISEASE TESTING SUMMARY 



The thirty-eight-year testing summary listed in table 6 reveals that the 1957-58 

 season has the lowest percentage of positive tests and the highest percentage of birds 

 in nonreacting flocks. It appears hopeful that in the future no infected flocks will 

 be detected during an entire season. 



Table 6. Thirty -Eight -Year Pullorum Disease Testing Summary 



Season 



Flocks 



Birds 



Positive Non- 

 Total Tests reacting 

 Tests Percent Flocks 



Birds in Non- 

 reacting Flocks 



Number Percent 



1920-21 108 



1921-22 110 



1922-23 121 



1923-24 139 



1924-25 156 



1925-26 201 



1926-27 249 



1927-28 321 



1928-29 413 



1929-30 460 



1930-31 447 



1931-32 455 



1932-33 335 



1933-34 262 



1934-35 244 



1935-36 252 



1936-37 307 



1937-38 308 



1938-39 355 



1939-40 346 



1940-41 309 



1941-42 366 



1942-43 332 



1943-44 413 



1944-45 458 



1945-46 538 



1946-47 562 



1947-48 494 



1948-49 458 



1949-50 475 



1950-51 448 



1951-52 417 



1952-53 371 



1953-54 338 



1954-55 311 



1955-56 285 



1956-57... 272 



1957-58 269 



ERADICATION OF PULLORUM DISEASE IN NONBREEDING FLOCKS 



During the past year all known and suspicious foci of pullorum disease were 

 investigated and measures taken to eradicate the infection from the premises in- 

 volved. Flocks on thirteen diff'erent premises were either found infected or were 



10 



