Table 3.

Properties of ECOR strains harboring the inserted sequencea

StrainECOR groupDistribution of UTI-associated virulence determinantsb
pap orprssfakpshly
EC23A
EC32B1
EC51B2++++
EC52B2++++
EC54B2+++
EC56B2+++
EC57B2++++
EC55B2++
EC65B2++
EC61B2+
EC62B2++
EC63B2++++
EC64B2+++
EC53B2++++
EC59B2
EC60B2+++
EC66B2+++
  • a Evidence for the presence and location of the rpoS-proximal inserted sequence in the ECOR strains was sought by multiplex PCR test 1 with PCR-based detection ofputP as a control (see the text and Table 1). The listed strains, ordered according to their evolutionary relationships (18), contained both putP and therpoS-proximal insertion sequence as indicated by both tests. The other 55 ECOR strains (not listed) contained the former but not the latter sequence.

  • b The mnemonics refer to genetic loci encoding the following virulence determinants: pap, pyelonephritis-associated or P pili with class I adhesins;prs, pyelonephritis-associated or P pili with class III adhesins; sfa, S-fimbrial adhesins; kps, type II capsule; hly, α-hemolysin (6, 22). +, present; −, absent.