A Yersinia pestis lpxM-mutant live vaccine induces enhanced immunity against bubonic plague in mice and guinea pigs

  • V. A. Feodorova
  • , L. N. Pan'kina
  • , E. P. Savostina
  • , L. V. Sayapina
  • , V. L. Motin
  • , S. V. Dentovskaya
  • , R. Z. Shaikhutdinova
  • , S. A. Ivanov
  • , B. Lindner
  • , A. N. Kondakova
  • , O. V. Bystrova
  • , N. A. Kocharova
  • , S. N. Senchenkova
  • , O. Holst
  • , G. B. Pier
  • , Y. A. Knirel
  • , A. P. Anisimov

Research output: Contribution to journalArticlepeer-review

36 Scopus citations

Abstract

The lpxM mutant of the live vaccine Yersinia pestis EV NIIEG strain synthesising a less toxic penta-acylated lipopolysaccharide was found to be avirulent in mice and guinea pigs, notably showing no measurable virulence in Balb/c mice which do retain some susceptibility to the parental strain itself. Twenty-one days after a single injection of the lpxM-mutant, 85-100% protection was achieved in outbred mice and guinea pigs, whereas a 43% protection rate was achieved in Balb/c mice given single low doses (103 to 2.5 × 104 CFU) of this vaccine. A subcutaneous challenge with 2000 median lethal doses (equal to 20,000 CFU) of fully virulent Y. pestis 231 strain, is a 6-10-fold higher dose than that which the EV NIIEG itself can protect against.

Original languageEnglish (US)
Pages (from-to)7620-7628
Number of pages9
JournalVaccine
Volume25
Issue number44
DOIs
StatePublished - Nov 1 2007

Keywords

  • Live plague vaccine
  • Yersinia pestis EV NIIEG
  • lpxM(msbB) mutant

ASJC Scopus subject areas

  • Molecular Medicine
  • General Immunology and Microbiology
  • General Veterinary
  • Public Health, Environmental and Occupational Health
  • Infectious Diseases

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