HIGH YIELD PERTUSSIS VACCINE PRODUCTION STRAIN AND METHOD FOR MAKING SAME

摘要

The present invention provides a vaccine production strain of Bordetella bronchiseptica that produces a pertussis toxin in high yield. The present invention provides a method for creating a Bordetella bronchiseptica cell line which produces a Bordetella pertussis toxin comprising the steps of introducing a plasmid containing a DNA encoding antibiotic resistance into a Bordetella bronchiseptica strain, selecting for isolates in which the DNA encoding antibiotic resistance is recombinantly incorporated into the chromosome in place of the Bordetella bronchiseptica toxin gene, introducing a plasmid containing DNA encoding subunits of the Bordetella pertussis toxins into the Bordetella bronchiseptica isolates; and, selecting for isolates in which DNA encoding Bordetella pertussis toxin subunit is recombinantly incorporated into the chromosome, the resulting cells producing the Bordetella pertussis toxin. The present invention further provides a method for creating a Bordetella bronchiseptica cell line which produces a Bordetella pertussis toxin and does not express filamentous hemagglutinin.