TABLE 1.

PFGE subtype discrimination among L. monocytogenes ribotypes

Lineage	Ribotype(s)	No. of isolates	No. of PFGE types
I	116-239-S-2	7	3
	DUP-1038B	40	18
	DUP-1042A	6	6
	DUP-1042B	48	34
	DUP-1042C	7	5
	DUP-1043A	6	5
	DUP-1044A	32	8
	DUP-1044B	18	11
	DUP-1052A	21	16
	Ribotypes with <5 occurrences	25	23
Total for lineage I		210	129
II	DUP-1023A	5	5
	DUP-1030A	8	8
	DUP-1030B	13	7
	DUP-1039A	13	11
	DUP-1039B	6	2
	DUP-1039C	66	41
	DUP-1039D	10	2
	DUP-1039E	27	16
	DUP-1045A	16	9
	DUP-1045B	19	13
	DUP-1045D	9	7
	DUP-1053A	6	4
	DUP-1054A	6	5
	DUP-1062A	11	3
	DUP-1062E	7	4
	Ribotypes with <5 occurrences	48	43
Total for lineage II		270	180
III	DUP-18606	5	2
	Ribotypes with <5 occurrences	4	4
Total for lineage III		9	6
Unknown	Ribotypes with <5 occurrences	6	6
Total for all lineages		495	NAa

^aNA, not applicable. Eleven PFGE types were further discriminated by ribotyping; the total for this column should thus be 321 even though only 310 PFGE types were differentiated among the 495 isolates