Drug – bio-affecting and body treating compositions – Whole live micro-organism – cell – or virus containing – Genetically modified micro-organism – cell – or virus
Patent
1981-07-31
1986-12-30
Hazel, Blondel
Drug, bio-affecting and body treating compositions
Whole live micro-organism, cell, or virus containing
Genetically modified micro-organism, cell, or virus
424 93, 435253, A61K 39112, C12N 120
Patent
active
046328300
ABSTRACT:
A living, attenuated, oral vaccine system is described for the immunization gainst enteric disease. This oral vaccine is a genetic hybrid derivative of an attenuated galactose epimeraseless strain of S. typhi which carries at least one protective antigen other than normal somatic S. typhi antigens. The oral vaccine can provide protection against both typhoid fever and at least one other enteric disease. A bivalent oral vaccine is described wherein the non-typhoid protective antigen is the plasmid-encoded form I antigen of Shigella sonnei. A protective antigen from Shigella sonnei was transferred to a streptomycin resistant mutant of S. typhi strain Ty21a. The transconjugant S. typhi strain expressed both S. typhi and S. sonnei antigens and protected experimental animals against lethal infections with either S. typhi or S. sonnei. This strain is considered to be useful as a vaccine against typhoid fever and bacillary dysentery caused by S. sonnei. The mutated galactose epimeraseless S. typhi strain such as S. typhi Ty21a strain can be utilized as a carrier strain for other protective antigens.
REFERENCES:
patent: 3856935 (1972-12-01), Germanier
Kopecko, D., et al., Injection and Immunity, vol. 29, pp. 207-214, 1980.
Baron Louis S.
Formal Samuel B.
Kopecko Dennis J.
Bellamy Werten F. W.
Hazel Blondel
Petruncio John M.
Raubitschek John H.
The United States of America as represented by the Secretary of
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