Abstract: A vaccine against cholera and/or ETEC is provided, comprising a Vibrio cholerae O1 cell, characterized in that said cell comprises O1 antigens of both Ogawa and lnaba serotypes. Genetically modified Vibrio cholerae O1 cells for use in such vaccines, DNA-constructs for the modification, uses for the vaccine and methods of making a vaccine are also provided.

Abstract: A cholera toxin-like polypeptide useful as adjuvant is provided. Polynucleotide coding to the polypeptide and associated vectors, host cells and methods of production are provided. Adjuvants, compositions comprising the polypeptide, and uses thereof are also provided.

Abstract: A vaccine against cholera and/or ETEC is provided, comprising a Vibrio cholerae O1 cell, characterized in that said cell comprises O1 antigens of both Ogawa and lnaba serotypes. Genetically modified Vibrio cholerae O1 cells for use in such vaccines, DNA-constructs for the modification, uses for the vaccine and methods of making a vaccine are also provided.

Abstract: Escherichia coli strains, such as enterotoxigenic E. coli strains, genetically engineered to express from recombinant plasmids one or more colonization factors (CFs) associated with enterotoxigenic Escherichia coli bacteria (ETEC) in an increased amount compared to said CFs expressed by ETEC wild-type reference strains, as well as a method of producing such strains, and vaccine compositions against diarrhea comprising such strains, are described. Further, E. coli strains expressing unnatural combination of at least two different CFs, e.g., CFA/I+CS2, CFA/I+CS6, or CS2+CS4 are disclosed.

Abstract: The present invention relates to a method for generating an RNA library or a (poly)peptide library comprising the steps of: (a) providing one or more nucleic acid molecules each comprising i) two or more coding elements (A) each giving rise to an RNA molecule upon transcription and/or a (poly)peptide upon transcription and translation; and ii) linking elements (B) arranged according to the general formula of B(AB)2+n, wherein said linking elements comprise one or more sequence motifs not found in said two or more coding elements allowing specific disruption of the linking elements (B); (b) cloning the nucleic acid molecule of step (a) into a vector; (c) transforming a host cell with the vector obtained in step (b) and propagating said transformed cell; (d) preparing vector DNA from the transformed and propagated cells of step (c); (e) (i) disrupting the vector DNA obtained in step (d) with one or more agents recognizing said one or more sequence motifs of the linking elements or (ii) performing an amplificati

Abstract: A recombinant operon comprising a gene assembly wherein there are at least two structural genes coding for at least two major subunits of colonization factor antigens (CFs) associated with enterotoxigenic Escherichia coli bacteria (ETEC), is disclosed. Further disclosed is a host cell, such as an Escherichia coli cell, genetically engineered to comprise such a recombinant operon, wherein said operon is located on an episomal element, such as a plasmid, or integrated in the chromosome of said host cell. Also disclosed is a method of producing a host cell capable of expressing from said operon at least two major subunits of colonization factor antigens (CFs) associated with enterotoxigenic Escherichia coli bacteria (ETEC). In addition, a vaccine composition against diarrhea comprising at least one such host cell together with pharmaceutically acceptable excipients, buffers, and/or diluents is disclosed. Finally is disclosed the use of said operon in the production of such a vaccine.

Abstract: Escherichia coli strains, such as enterotoxigenic E. coli strains, genetically engineered to express from recombinant plasmids one or more colonization factors (CFs) associated with enterotoxigenic Escherichia coli bacteria (ETEC) in an increased amount compared to said CFs expressed by ETEC wild-type reference strains, as well as a method of producing such strains, and vaccine compositions against diarrhea comprising such strains, are described. Further, E. coli strains expressing unnatural combination of at least two different CFs, e.g., CFA/I+CS2, CFA/I+CS6, or CS2+CS4 are disclosed.

Abstract: The present invention provides an expression system for producing a B subunit of a cholera toxin (CTB) wherein the expression system comprises a Vibrio cholerae host cell lacking the functionality of a thyA gene; and an expression vector comprising a functional thyA gene and a CTB gene which is substantially free of the flanking sequences immediately contiguous by the 5? and 3? end of the CTB gene in the naturally occurring genome of the host cell from which the CTB gene is derived. The present invention also provides a method of producing CTB, and an isolated nucleic acid construct that is used as an expression vector in the expression system.