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Immunogenicity of the Shigella flexneri serotype Y (SFL 124) vaccine strain expressing cloned glucosyl transferase gene of converting bacteriophage SfX



Immunogenicity of the Shigella flexneri serotype Y (SFL 124) vaccine strain expressing cloned glucosyl transferase gene of converting bacteriophage SfX



Microbiology and Immunology 39(7): 467-472



The glucosyl transferase gene (gtr) from bacteriophage phage X (SfX) caused partial conversion of serotype Y (group antigen 3, 4) to X (group antigen 7, 8) when introduced into a candidate vaccine strain of Shigella flexneri serotype Y (SFL124). The gtr gene caused conversion of O-antigens but did not eliminate the adsorption of the corresponding phage SfX. The hybrid strain expressing both group antigens 7, 8 and 3, 4 showed 75% protection when immunized guinea pigs were challenged with a wild-type S. flexneri serotype X strain. No protection was observed against serotype Y challenge, although group antigen 3, 4 was detected in the LPS of the hybrid strain. This suggests the importance of O-antigen immunity in the host defense against shigellosis.

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Accession: 046333045

Download citation: RISBibTeXText

PMID: 8569531

DOI: 10.1111/j.1348-0421.1995.tb02230.x


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