Vaccine containing a campylobacter bacterium having an enhanced antigenic property
US5869066A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | May 30, 1997 |
| Grant date | Feb 9, 1999 |
| Priority date | — |
| Expiry date | May 30, 2017 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S435/975
- WIPO fieldPharmaceuticals
- WIPO sectorChemistry
Abstract
This invention relates generally to in vitro methods for inducing or enhancing expression of enteric bacterial antigens and/or virulence factors thereby producing antigenically enhanced enteric bacteria, to methods for using antigenically enhanced enteric bacteria and to vaccines comprising antigenically enhanced enteric bacteria. Further, a vaccine comprising a Campylobacter bacterium having en enhanced antigenic property is disclosed. The culture medium conditions comprise 0.05% to 3% bile or 0.025% to 0.6% of one or more bile acids or salts. In addition a divalent cation chelator can also be included in the culture medium. The bacteria culture is in a growth phase at early log phase and between early log phase and stationary phase. The enhanced antigenic property is a higher level of an immunogenic antigen when compared to the antigenic property of the same bacteria grown on brain heart infusion broth.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.