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  • Title: Studies on formulation of a combination heat killed immunogen from diarrheagenic Escherichia coli and Vibrio cholerae in RITARD model.
    Author: Mukherjee P, Mondal V, Bhaumik U, Sinha R, Sarkar S, Mitra S, Howlader DR, Maiti S, Mukhopadhyay AK, Dutta S, Koley H.
    Journal: Microbes Infect; 2019; 21(8-9):368-376. PubMed ID: 30853357.
    Abstract:
    Multiple diarrheagenic enteric bacterial infections cause global morbidity and mortality. A combination vaccine is needed to combat different diarrhea-causing organisms. In our present work, we formulated a combination of antigens from three different diarrheagenic Escherichia coli strains and three different Vibrio cholerae strains. We demonstrated that our newly formulated combination immunogen was able to raise species-specific immunogenicity. This formulation also gave protection against different diarrheagenic E. coli strains in the removable intestinal tie-adult rabbit diarrhea model. However, protective efficacy was not found against the V. cholerae El Tor Ogawa Haitian variant, but challenged with V. cholerae El Tor Inaba or O139 showed protection in rabbits. This is the first report of a single formulated nonliving heat-killed combination immunogen from different diarrheagenic E. coli and V. cholerae that could bestow protection against different bacteria in an animal model.
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