TABLE 2.

C. difficile strains with variant toxin genes

Strain	Toxino- type	PFGE type	Serogroup	tcdB	tcdA	Date of isolation (day.mo.yr)	Origina	Patient birth date (yr)	Diagnosis
38544	I	NTb	C	+	+	1.7.1991	Brussels1, Belgium	1944	PMC
EX 623	I	8	C	+	+	19.11.1990	Brussels2, Belgium	Unknown	AAD
AC 008	II	9	A14	+	+	7.4.1994	Paris, France	Unknown	AAD
SE 844	III	2	A1	+	+	10.4.1995	Annecy1, France	1966	AAD
SE 847	III	2	A1	+	+	10.4.1995	Annecy1, France	1959	AAD
EX 482	III	2	A1	+	+	2.1.1990	Brussels3, Belgium	1920	AAD
45129	III	2	A1	+	+	7.9.1992	Brussels4, Belgium	1939	AAD
35004	III	2	A1	+	+	16.11.1989	Namur, Belgium	1932	PMC
44027	III	NDc	A1	+	+	15.6.1992	Brussels5, Belgium	1939	PMC
55538	IV	5a	A1	+	+	12.5.1995	Brussels6, Belgium	1991	AAD
55767	IV	5b	A1	+	+	12.6.1995	Brussels7, Belgium	1944	AAD
40067	IV	5b	A1	+	+	14.10.1991	Brussels8, Belgium	1990	AAD
7701	IV	6	A5	+	+	23.7.1985	Bouge, Belgium	Unknown	AAD
SE 881	V	10	A15	+	+	30.8.1995	Annecy2, France	1951	AAD
48489	VI	3	A15	+	+	9.4.1993	Tournai, Belgium	1931	PMC
51377	VI	4	A15	+	+	11.2.1994	Mons1, Belgium	1926	PMC
BR 071	VI	3	A15	+	+	3.7.1995	England	Unknown	AAD
39696	VI	4	E6	+	+	19.9.1991	Brussels6, Belgium	1980	AAD
57267	VII	4	E6	+	+	21.12.1995	Brussels9, Belgium	1946	AAD
1470d	VIII	7a	F	+	−	2.12.1981	Brussels1, Belgium	1981	Asymptomatic
20376	VIII	7b	X	+	−	8.7.1988	Brussels1, Belgium	1986	Asymptomatic
51680	IX	11a	A16	+	+	17.3.1994	Mons2, Belgium	1933	AAD
SE 938	IX	11b	A16	+	+	5.1.1996	Annecy2, France	1931	AAD
8864d	X	12	Unknown	+	−	Unknown	England	Unknown	Unknown

^aBrussels1, Brussels2, etc., represent different units or different hospitals in Brussels. 

^bNT, nontypeable. 

^cND, not done. 

^dFor other strains of toxinotype VIII see reference 7; for strain 8864 (toxinotype X) see references 3 and 12.