TABLE 1.

Characteristics of tested isolates of Yersinia enterocolitica 1B/O8

Strain	Epidemiological data				Presence of pYVa	PFGE result
	Yr of isolation	Region of origin	Age of patient	Main clinical manifestation		Cloneb	NotI	XbaI
WA-314	NAc	NA (reference strain)	NA	NA	−	4	B	I
27/04	2004	Konin	38	Mesenteritis	+	1	A	II
67/04	2004	Poznań	NDd	ND	−	1	A	II
152/05	2005	Czştochowa	1	Diarrhea	−	1	A	II
85/05	2005	Czştochowa	2	Diarrhea	−	1	A	II
82/06	2006	Poznań	2	Diarrhea	−	1	A	II
86/06	2006	Kielce	14	Mesenteritis	+	1	A	II
51/07	2007	Kielce	1	ND	−	1	A	II
52/07	2007	Poznań	2	Diarrhea	+	1	A	II
71/07	2007	Poznań	1	Diarrhea	−	1	A	II
72/07	2007	Poznań	3	ND	−	1	A	II
84/07	2007	Poznań	9	Diarrhea	−	2	A1	II
85/07	2007	Poznań	27	Cecal abscess	−	1	A	II
89/07	2007	Grodzisk Maz.e	36	Cecal abscess	+	1	A	II
200/07	2007	Zabrze	1	Diarrhea	−	1	A	II
361/07	2007	Kielce	24	Pyoperitoneum	−	2	A1	II
379/07	2007	Poznań	28	Pyoperitoneum	−	1	A	II
404/07	2007	Katowice	25	Abdominal ulcer	−	2	A1	II
31/08	2008	Warsaw	3	Diarrhea	+	1	A	II
46/08	2008	Łódź	ND	ND	+	1	A	II
47/08	2008	Zabrze	2	Diarrhea	−	1	A	II
51/08	2008	Kielce	2	Diarrhea	−	1	A	II
61/08	2008	Pułtusk	78	Bacteremia	−	1	A	II
93/08	2008	Warszawa	10	Diarrhea	−	2	A1	II
128/08	2008	Katowice	1	ND	−	1	A	II
146/08	2008	Tarnów	1	Diarrhea	+	1	A	II
160/08	2008	Szczecin	1	Diarrhea	−	1	A	II
161/08	2008	Szczecin	50	Diarrhea	−	1	A	II
162/08	2008	Kielce	2	ND	−	1	A	II
171/08	2008	Warszawa	ND	Bacteremia	+	2	A1	II
172/08	2008	Warszawa	10	Diarrhea	−	1	A	II
175/08	2008	Zabrze	5	ND	−	1	A	II
180/08	2008	Bydgoszcz	3	Diarrhea	+	3	A	III
181/08	2008	Bydgoszcz	6	Pseudoappendicitis	−	1	A	II

^aPresence (+) or absence (−) of the Yersinia virulence plasmid.

^bGroups of isolates indistinguishable by combined NotI and XbaI PFGE genotyping.

^cNA, not applicable.

^dND, not determined.

^eGrodzisk Maz., Grodzisk Mazowiecki.