Abstract
Summary
1. Four hundred and fourteen sera from 4 turkey flocks have been tested by means of hemagglutination inhibition test utilizing a PPLO antigen. 2. This test gives reproducible results and gives promise of being useful in screening breeder flocks. 3. PPLO isolated from chickens and turkeys are apparently antigenically homogeneous with respect to this HI test as based upon 4 strains isolated from widely separated sources.
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