Abstract
A method has been evaluated for the titration of antibodies to Vibrio cholerae, based on the ability of sera containing such antibodies to neutralize the inflammatory effect of a factor from V. cholerae cultures on the skin of test animals.
Ninefold or greater rises in toxin-neutralization titre were found in 73% of 111 bacteriologically confirmed cholera patients in an endemic area of East Pakistan, and in 2.5% of bacteriologically negative patients. This method compares well with the microtechniques developed for the titration of vibrio-agglutinating and vibriocidal antibodies to V. cholerae.
The toxin-neutralization method has the advantage that no titre rise is produced in response to vaccination with the whole-cell vaccine in current use in East Pakistan.
Relatively high toxin-neutralization titres were noted among children under 15 years of age without vibriocidal or agglutinating antibodies, and without a history of prior infection with V. cholerae.
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Selected References
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