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Antigenic Analysis of Variants of B. Paradysenteriae and the Serological Relation of One Variant to B. Morgani

From the Laboratories of the Mary Imogene Bassett Hospital, Cooperstown, New York

Abstract

In a preceding paper (1) the results of a study of the antigenic relationships of five cultures of B. paradysenteriae (Eberthella paradysenteriae) and 4 cultures of B. Morgani (Salmonella Morgani) were described. These cultures were obtained from the stools of ten children involved in a small outbreak of summer diarrhea. The evidence presented in our preceding paper indicated only slight antigenic kinship between the two groups. The overlapping was confined to the group components of the antigenic complex. The present paper describes the results of a study of the antigenic relationships of 2 stable variants which were produced by growing a single cell culture of B. paradysenteriae in homologous immune rabbit serum. Inasmuch as the 5 cultures of B. paradysenteriae isolated during the epidemic of summer diarrhea were found to be serologically identical, only one culture from this group was used in the experimental production of variants.