TABLE 4.

Comparison of the HPI in STEC and Y. pestis and Y. enterocolitica

Strain	Serotype	Size of PCR product (bp) from regiona:
		I	II	III	IV	V	VI	VII	VIII	IX	X	XI	XII	XIII	XIV	XV	XVI	XVII	XVIII
STEC 3172/97	O128:H2	1,200	1,400	1,200	160	800	230	280	240	360	780	—b	800	2,800	2,800	1,300	300	1,700	2,500
STEC 5720/96	O26:H−	900	1,100	900	160	800	230	280	240	360	780	—	800	2,800	2,800	1,300	300	1,700	2,500
E. coli DH5α		—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—
Y. pestis KIM6+		1,255	1,500	1,203	160	797	233	286	237	359	780	100	830	2,797	2,805	1,340	300	1,762	2,518
Y. enterocolitica WA-314	O8	1,255	1,500	1,203	160	797	233	286	237	359	780	NPc	830	2,797	2,930	1,340	300	1,762	2,518

^aI to XI are regions shown in Fig. 1A; XII to XVIII are regions shown in Fig. 1B. The sizes of Yersinia PCR products derived from regions I to XVIII are according to the published HPI sequences (13, 34, 39); the sizes of E. coli PCR products derived from the corresponding regions of E. coli strains were determined after agarose gel electrophoresis. 

^b—, no PCR product obtained. 

^cNP, not present.