• Vaccine Name: Bordetella pertussis aroA mutant vaccine
• Target Pathogen: Bordetella pertussis
• Target Disease: Whooping Cough
• Vaccine Ontology ID: VO_0002807
• Type: Live, attenuated vaccine
• Status: Research
• aroA gene engineering:
  • Type: Gene mutation
  • Description:
  • Detailed Gene Information: Click Here.
• Preparation: A DNA fragment encoding a kanamycin resistance determinant was used to insertionally inactivate the cloned aroA gene of Bordetella pertussis in Escherichia coli K-12, and a conjugative shuttle vector system based on the suicide vector pRTP1 was used to deliver the mutations from E. coli back into B. pertussis CN2992FS and BP1. The aroA mutation was introduced by allelic exchange into the chromosome of B. pertussis, resulting in otherwise isogenic parental and aroA mutant pairs. The B. pertussis aroA mutants grew well on laboratory medium supplemented with aromatic compounds but failed to grow on unsupplemented medium (Roberts et al., 1990).
• Immunization Route: intracerebral challenge

Mouse Response

• Persistence: The B. pertussis aroA mutants expressed the normal B. pertussis extracellular, virulence-associated proteins (Roberts et al., 1990).
• Efficacy: Mice exposed to three separate aerosols of live B. pertussis aroA bacteria were protected against lung colonization after being exposed to an aerosol containing the virulent parental B. pertussis strain. High-level antibodies against B. pertussis rapidly appeared in the sera of mice immunized by aerosol with the B. pertussis aroA strains and challenged with the virulent parent (Roberts et al., 1990).