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© Marie-Christine Prévost, Anne Derbise
Bactéries Yersinia pestis en microscopie electronique à balayage.
Publication : Journal of clinical microbiology

Characterization of atypical isolates of Yersinia intermedia and definition of two new biotypes

Scientific Fields
Diseases
Organisms
Applications
Technique

Published in Journal of clinical microbiology - 03 Jun 2009

Martin L, Leclercq A, Savin C, Carniel E

Link to Pubmed [PMID] – 19494062

J. Clin. Microbiol. 2009 Aug;47(8):2377-80

The species Yersinia intermedia is a member of the genus Yersinia which belongs to the Enterobacteriaceae family. This species is divided into eight biotypes, according to Brenner’s biotyping scheme. This scheme relies on five tests (utilization of Simmons citrate and acid production from d-melibiose, d-raffinose, alpha-methyl-d-glucoside [alphaMG], and l-rhamnose). The collection of the French Yersinia Reference Laboratory (Institut Pasteur, Paris, France) contained 44 strains that were originally identified as Y. intermedia but whose characteristics did not fit into the biotyping scheme. These 44 strains were separated into two biochemical groups: variant 1 (positive for acid production from l-rhamnose and alphaMG and positive for Simmons citrate utlization) and variant 2 (positive for acid production from l-rhamnose and alphaMG). These atypical strains could correspond to new biotypes of Y. intermedia, to Y. frederiksenii strains having the atypical property of fermenting alphaMG, or to new Yersinia species. These strains did not exhibit growth or phenotypic properties different from those of Y. intermedia and Y. frederiksenii and did not harbor any of the virulence traits usually found in pathogenic species. DNA-DNA hybridizations performed between one strain each of variants 1 and 2 and the Y. intermedia and Y. frederiksenii type strains demonstrated that these variants do belong to the Y. intermedia species. We thus propose that Brenner’s biotyping scheme be updated by adding two new biotypes: 9 (for variant 1) and 10 (for variant 2) to the species Y. intermedia.

https://www.ncbi.nlm.nih.gov/pubmed/19494062