TABLE 1.

Taxonomy and characteristics of the subspecies of F. tularensis

Current terminologyPrevious namesBiovara16s rRNA genotypebGeographic locationaCitrulline ureidase activityGlycerol fermentationGlucose fermentationSensitivity to erythromycin
Francisella tularensis subsp. tularensis Francisella tularensis A; Francisella tularensis subsp. neararticaNAAPrimarily N. America+c+++
Francisella tularensis subsp. holarctica Francisella tularensis B; Francisella tularensis subsp. palaearcticaIBPrimarily Europe, Siberia, Far East, Kazakhstan, and N. Americac++
IIBPrimarily Eurasia+
Japonica AJapan+++
Francisella tularensis subsp. mediaasiaticaNAAPrimarily central Asia and some parts of the former USSR++d+
Francisella novicida Francisella tularensis subsp. novicidaNANRPrimarily N. AmericaNRNR+NR
  • a From Olsufjev and Mesheryakova (130). NA, not applicable.

  • b From Sandström et al. (151)

  • c Sandström et al. (151) reported some variant strains, biovar not known.

  • d Sandström et al. (151) reported that these strains were unable to ferment glucose; Olsufjev and Mesheryakova (130) reported that the “Rodionova” method was required to demonstrate glucose fermentation. NR, not reported.