Abstract
Summary
(1) The intravenous immunization of rabbits with living and heat-killed avirulent strains (4428 and F.302) of Listerella tnonocytogenes did not produce complement-fixing or flocculating reagins for antigens commonly employed in the serum-diagnosis of syphilis. (2) Both produced complement-fixing antibody and agglutinins for antigens of homologous strains of Listerella. (3) Neither strain produced agglutinin for sheep erythrocytes in the immunization of rabbits. (4) Both strains produced moderate leucocytosis mainly due to an increase of polymorphonuclears with a slight increase of the monocytes in some of the animals.
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