TABLE 3.

Relationship between cutoff value and clustering of DT104 strains by use of three different cluster analysis methods

Cluster analysis method and cutoff value (%)	No. of strains		No. of clusters	Cluster designation	No. of clustered strains isolated from building:
	Unclustered	Clustered			J	YS	Total
XbaI
95	9	43	2	95-X1	21	20	43
				95-X2	2	0
90	3	49	3	90-X1	22	22	49
				90-X2	0	2
				90-X3	3	0
85	3	49	1	85-X1	25	24	49
80	1	51	1	80-X1	26	25	51
75	0	52	1	75-X1	26	26	52
BlnI
95	4	48	3	95-B1	22	0	48
				95-B2	0	24
				95-B3	2	0
90	1	51	1	90-B1	26	25	51
85	0	52	1	85-B1	26	26	52
VNTR
95	3	49	3	95-V1	24	15	49
				95-V2	0	8
				95-V3	2	0
90	1	51	3	90-V1	26	15	51
				90-V2	0	8
				90-V3	0	2
85	1	51	2	85-V1	26	23	51
				85-V2	0	2
80	1	51	2	80-V1	26	23	51
				80-V2	0	2
75	0	52	2	75-V1	26	23	52
				75-V2	0	3