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Experimental oral immunization with L-forms of Vibrio cholerae
Infection and Immunity
|January 1, 1972
Summary
Oral administration of Vibrio cholerae L-form lysates generates a strong, early coproantibody response. This immune response, including circulating antibodies, remains elevated for at least six weeks post-immunization.
Area of Science:
- Immunology
- Microbiology
- Vaccine Development
Background:
- Vibrio cholerae causes cholera, a significant global health concern.
- Developing effective oral vaccines against cholera is a priority.
- L-forms of bacteria are potential candidates for vaccine development due to altered antigenicity.
Purpose of the Study:
- To evaluate the immunogenicity of oral L-form Vibrio cholerae lysates.
- To assess the resulting coproantibody and circulating antibody responses.
- To determine the duration of the immune response.
Main Methods:
- Oral administration of L-form Vibrio cholerae lysates to subjects.
- Measurement of coproantibody levels in stool samples.
- Measurement of circulating antibody titers in serum.
- Monitoring antibody levels over a six-week period.
Main Results:
- Oral L-form Vibrio cholerae lysates were antigenic.
- An early and high coproantibody response was elicited.
- No booster effect was observed with L-form lysates.
- Significant levels of coproantibodies persisted for six weeks.
- A considerable rise in circulating antibodies was observed, persisting for six weeks.
Conclusions:
- Oral L-form Vibrio cholerae lysates are effective in inducing a robust and sustained mucosal and systemic immune response.
- These findings support the potential of L-form bacterial lysates as oral vaccine candidates for cholera.