Diversity of Bacillus anthracis strains in Georgia and of vaccine strains from the former Soviet Union

Maya Merabishvili, Merab Natidze, Sergo Rigvava, Lorenzo Brusetti, Noura Raddadi, Sara Borin, Nina Chanishvili, Marina Tediashvili, Richard Sharp, Maurizio Barbeschi, Paolo Visca, Daniele Daffonchio*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

25 Scopus citations


Despite the increased number of anthrax outbreaks in Georgia and the other Caucasian republics of the former Soviet Union, no data are available on the diversity of the Bacillus anthrads strains involved. There is also little data available on strains from the former Soviet Union, including the strains previously used for vaccine preparation. In this study we used eight-locus variable-number tandem repeat analyses to genotype 18 strains isolated from infected animals and humans at different sites across Georgia, where anthrax outbreaks have occurred in the last 10 years, and 5 strains widely used for preparation of human and veterinary vaccines in the former Soviet Union. Three different genotypes affiliated with the A3.a cluster were detected for the Georgian isolates. Two genotypes were previously shown to include Turkish isolates, indicating that there is a regional strain pattern in the South Caucasian-Turkish region. Four of the vaccine strains were polymorphic, exhibiting three different patterns of the cluster A1.a genotype and the cluster A3.b genotype. The genotype of vaccine strain 71/12, which is considered an attenuated strain in spite of the presence of both of the virulence pXO plasmids, appeared to be a novel genotype in the A1.a cluster.

Original languageEnglish (US)
Pages (from-to)5631-5636
Number of pages6
Issue number8
StatePublished - Aug 2006
Externally publishedYes

ASJC Scopus subject areas

  • Applied Microbiology and Biotechnology
  • Food Science
  • Biotechnology
  • Ecology


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