TABLE 1.

Strains used in these studies

StrainBiovar/subsp.aRelevant characteristic(s)Geographical origin of parent strain/reference
Y. pestis
    KM218Orientalis/pestispFra pCD pPst Δpgm; derived from the Russian vaccine strain EV line NIIEGMadagascar
    EV11MAntiqua/pestispFra pCD pPst Δpgm; derived from the Russian vaccine strain EV line NIIEG and carrying an undefined chromosomal mutation(s) resulting from multiple in vitro passagesMadagascar
    KM260(11)Antiqua/pestispFra pCD pPst; derived from the virulent strain 231Aksai focus, Kirghizia
    KIMD1Medievalis/pestispFra pCD pPst+ ΔpgmIran/Kurdistan
    1146Antiqua/caucasicapFra pCD pPst; derived from the virulent strain 1146-ArmTrans-Caucasian-highland focus, Caucasus
E. coli
    DH5αlacZΔM15 Δ(lacZYA-argF) recA1 endA1 hsdR17(rk mk+) phoA supE44 thi gyrA96 relA151
  • a For more detailed information on biovar-subspecies interrelations, see reference 7.