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. 1974 Oct;10(4):762–764. doi: 10.1128/iai.10.4.762-764.1974

Live Oral Cholera Vaccine: Evaluation of the Clinical Effectiveness of Two Strains in Humans

Richard A Cash a, Stanley I Music a,1, Joseph P Libonati a, Andrew R Schwartz a,2, Richard B Hornick a
PMCID: PMC423019  PMID: 4426706

Abstract

El Tor Ogawa C14-S5 and EW-6, two live vaccine candidate strains, were given to volunteers in varying doses with and without bicarbonate. Vibrios were found in the stool of one of 32 men given the vaccine strain, and only three men developed a significant titer rise (fourfold or greater) at 2 weeks of vibriocidal or antitoxic antibody. Five men who had previously received 109 organisms of the C14-S5 strain were challenged subsequently with virulent Ogawa 395 Vibrio cholerae. The rate of clinical infection in these men was no different than in unvaccinated controls. It was demonstrated that the live oral cholera vaccines did not remain viable in the intestine long enough to act antigenically.

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Selected References

These references are in PubMed. This may not be the complete list of references from this article.

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