Table 1. The prevalence of cas cassettes and CRISPR arrays in different emm types and regions of isolation.

			CRISPR01 locus			CRISPR02 locus
emm type	Isolation region	No. of isolates	Intact locus	cas	CRISPR array	Intact locus	cas	CRISPR array
1	Foreign	54	53	54	53	54	54	54
	Local	35	35	35	35	35	35	35
3	Foreign	54	0	54	0	0	0	0
4	Foreign	2	0	2	0	2	2	2
	Local	49	0	49	0	49	49	49
12	Foreign	66	66	66	66	66	66	66
	Local	67	67	67	67	67	67	67
28	Foreign	5	5	5	5	5	5	5
Total (%)		332 (100%)	226 (68.1%, 226/332)	332 (100%, 332/332)	226 (68.1%, 226/332)	278 (83.7%, 278/332)	278 (83.7%, 278/332)	278 (83.7%, 278/332)