Abstract
Summary
L. monocytogenes (types 1, 2, 3, 4a, and 4b) produces a heterogenetic antigen demonstrable by hemagglutination test with suitable antisera. Sheep erythrocytes modified by this antigen are lysed in presence of (rabbit) antiserum and guinea pig complement. Antibodies against this antigen are present in certain L. monocytogenes and S. aureus (rabbit) antisera and can be removed by absorption with either L. monocytogenes (of all types), S. aureus, or B. subtilis. The findings may help to avoid a possible pitfall in interpretation of serologic tests for species specific L. monocytogenes antibodies.
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