Occurrence of Two Immunological Groups Within the Genus Listeria. Studies Based upon Precipitation Reactions

Abstract

Summary

Polysaccharides have been isolated from Listeria monocytogenes which precipitate in the presence of their specific immune sera. The immunological studies presented indicate the existence of 2 distinct animal groups, namely a rodent group and a ruminant group, thus corroborating the classification suggested by Schultz 2 and Julianelle. 3 . The precipitin test affords a simplified technic for the identification and immunological differentiation of the members of the genus Listeria.