Table 1.

The circulation of C. diphtheriae biotypes in Belarus (1996–2005)

Year	Total strains	C. diphtheriae biotype
		gravis		mitis		belfanti
		no.	%	no.	%	no.	%
1996	486	316	65.0	168	34.6	2	0.4
1997	410	231	56.3	170	41.5	9	2.2
1998	362	209	57.7	129	35.7	24	6.6
1999	339	220	64.9	115	33.9	4	1.2
2000	403	241	59.8	152	37.7	10	2.5
1996–2000	2000	1217	60.8	734	36.7	49	2.5
2001	408	187	45.8	192	47.1	29	7.1
2002	310	130	41.9	160	51.6	20	6.5
2003	213	66	31.0	131	61.5	16	7.5
2004	290	100	34.5	169	58.3	21	7.2
2005	292	114	39.0	171	58.6	7	2.4
2001–2005	1513	597	39.5	823	54.4	93	6.1