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. 1980 Nov;30(2):375–380. doi: 10.1128/iai.30.2.375-380.1980

Improved protection against cholera in adult rabbits with a combined flagellar-toxoid vaccine.

I G Resnick, C W Ford, G M Shackleford, L J Berry
PMCID: PMC551321  PMID: 7439983

Abstract

Ligated ileal loops of adult rabbits were used to evaluate the prophylactic potential against cholera of a combined vaccine consisting of toxin-free crude flagella (CF) and glutaraldehyde-derived cholera toxoid (TV). The resulting fluid accumulation ratios were compared with those in rabbits immunized with saline (controls) and with CF and TV alone. Data for single vaccines confirmed the superior protection effect of CF over TV. In rabbits vaccinated with both CF and TV, maximal fluid accumulation ratios were not obtained with a challenge dose as high as 5 X 10(9) colony-forming units (CFU). Two rabbits similarly immunized failed to produce positive loops with challenges of 6.3 X 10(8) and 5 X 10(9) CFU, respectively. The vibriocidal titer of serum from rabbits immunized with a killed commercial vaccine in addition to those listed above was determined at intervals for a period of 164 days. No vibriocidal activity was detected in serum of control rabbits and of rabbits vaccinated with TV. Serum from animals given CF or commercial vaccine had similar vibriocidal titers even when the test bacteria were nonflagellated. Protection against challenge as evaluated by ileal loops did not, however, correlate with vibriocidal titer.

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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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