alexa A comparison of Plague vaccine, USP and EV76 vaccine induced protection against Yersinia pestis in a murine model.
Immunology

Immunology

Journal of Vaccines & Vaccination

Author(s): Russell P, Eley SM, Hibbs SE, Manchee RJ, Stagg AJ,

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Abstract The median lethal dose (MLD) of a pathogenic strain of Yersinia pestis was established by three routes of administration in three strains of mouse. There was no significant difference between the MLDs in the different strains of mouse. The MLD by the subcutaneous route in Balb/C and an outbred line was approximately 1 c.f.u.; the MLD following intraperitoneal administration was tenfold higher. There were significant differences in the mean times to death after administration of the challenge by different routes. The relative efficacy of a live attenuated vaccine strain of Y. pestis (EV76) was compared with that of the formaldehyde-killed vaccine (Plague vaccine, USP). EV76 protected against high challenge doses (up to 5.75 x 10(6) MLD), though immunized animals showed side effects of varying severity. The killed vaccine was less effective in terms of dose-protection (deaths occurred after challenge with 4000 MLD) and several of the vaccinated animals suffered sub-lethal, plague-related sequelae to the challenge.
This article was published in Vaccine and referenced in Journal of Vaccines & Vaccination

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