TABLE 3.

Properties of ECOR strains harboring the inserted sequence^a

Strain	ECOR group	Distribution of UTI-associated virulence determinantsb
		pap or prs	sfa	kps	hly
EC23	A	−	−	−	−
EC32	B1	−	−	−	−
EC51	B2	+	+	+	+
EC52	B2	+	+	+	+
EC54	B2	−	+	+	+
EC56	B2	+	−	+	+
EC57	B2	+	+	+	+
EC55	B2	+	−	+	−
EC65	B2	−	+	−	+
EC61	B2	−	−	+	−
EC62	B2	+	−	+	−
EC63	B2	+	+	+	+
EC64	B2	+	+	+	−
EC53	B2	+	+	+	+
EC59	B2	−	−	−	−
EC60	B2	+	+	−	+
EC66	B2	+	+	+	−

^aEvidence 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 of putP as a control (see the text and Table 1). The listed strains, ordered according to their evolutionary relationships (18), contained both putP and the rpoS-proximal insertion sequence as indicated by both tests. The other 55 ECOR strains (not listed) contained the former but not the latter sequence. 

^bThe 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.