학술논문
In a randomized, double-blinded, placebo-controlled trial, the single oral dose typhoid vaccine, M01ZH09, is safe and immunogenic at doses up to 1.7×1010 colony-forming units
Document Type
Article
Author
Source
Subject
*TYPHOID vaccines
*ORAL vaccines
*PLACEBOS
*DRUG dosage
*RANDOMIZED controlled trials
*IMMUNOGENETICS
*MEDICATION safety
*SEROLOGY
*COHORT analysis
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Language
ISSN
0264-410X
Abstract
Abstract: M01ZH09, S. Typhi (Ty2ΔaroCΔssaV) ZH9, is a single oral dose typhoid vaccine with independently attenuating deletions. A phase II randomized, double-blind, placebo-controlled, dose-escalating trial evaluated the safety and immunogenicity of M01ZH09 to 1.7×1010 colony-forming units (CFU). 187 Healthy adults received vaccine or placebo in four cohorts. Serologic responses and IgA ELISPOT were measured. At all doses, the vaccine was well tolerated and without bacteremias. One subject had a transient low-grade fever. 62.2–86.1% of subjects seroconverted S. Typhi-specific LPS IgG and 83.3–97.4% IgA; 92.1% had a positive S. Typhi LPS ELISPOT. M01ZH09 is safe and immunogenic up to 1.7×1010 CFU. Efficacy testing of this single-dose oral typhoid vaccine is needed. [Copyright &y& Elsevier]