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  • Title: Construction of a multivalent vaccine strain of Shigella flexneri and evaluation of serotype-specific immunity.
    Author: Jennison AV, Roberts F, Verma NK.
    Journal: FEMS Immunol Med Microbiol; 2006 Apr; 46(3):444-51. PubMed ID: 16553820.
    Abstract:
    Shigella flexneri causes more fatalities by shigellosis than any other Shigella species. There are 13 different serotypes of S. flexneri and their distribution varies between endemic geographical regions. The immune response against S. flexneri is serotype-specific, so current immunization strategies have required the administration of multiple vaccine strains to provide protection against multiple serotypes. In this study, we report the construction of a multivalent S. flexneri vaccine strain, SFL1425, expressing the O-antigen structure specific for serotypes 2a and 5a. This combination of type antigens has not previously been reported for S. flexneri. The multivalent vaccine strain, SFL1425 was able to induce a specific immune response against both serotypes 2a and 5a in a mouse pulmonary model.
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