. 2002 Jan;40(1):80–83. doi: 10.1128/JCM.40.1.80-83.2002

TABLE 1.

Evaluation of ICS test for detection of toxigenicity from pure cultures in countries of the former USSR and the United Kingdom by number, biotype and toxigenicity status of isolates tested in each center

Biotype	Toxigenicity^a	No. of isolates
Biotype	Toxigenicity^a	Riga, Latvia	Kiev, Ukraine	Moscow, Russia	St. Petersburg, Russia	Minsk, Belarus	Almaty, Kazakstan	London, United Kingdom	Total
C. diphtheriae var. gravis	+	212	83	61	19	34	7	32	448
	−	37	31	12	11	11	4	45	151
C. diphtheriae var. mitis	+	5	3	12	2	1		28	51
	−	64	62	11	10	11	6	16	180
C. diphtheriae var. belfanti	−			4		2		15	21
C. ulcerans	+		2	5				32	39
	−		7	4				14	25
Total		318	188	109	42	59	17	182	915

+, toxigenic; −, nontoxigenic.