Table 3.

The presence of CRISPR-cas type in hospital-acquired and dental-root isolates of E. faecalis.

CRISPR	CRISPR1-cas	CRISPR2	CRISPR3-cas	CRISPR1-cas or CRISPR2	CRISPR1-cas or CRISPR3-cas	CRISPR2 or CRISPR3-cas	CRISPR1-cas and CRISPR2	CRISPR1-cas and CRISPR3-cas	CRISPR2 and CRISPR3-cas	CRISPR1-cas and CRISPR2 and CRISPR3-cas
Hospital-acquired isolates (88)	19.3% (17)	53.4% (47)	2.3% (2)	59.1% (52)	21.6% (19)	54.5% (48)	13.6% (12)	0	1.1% (1)	0
Dental root isolates (73)	5.5% (4)	57.5% (42)	35.6% (26)	58.9% (43)	42.5% (31)	72.6% (53)	5.5% (4)	0	20.5% (15)	0
P-value§	0.008	0.358	<0.001	0.554	0.004	0.014	0.070	NS	<0.001	NS
Total (161)	13% (21)	55.3% (89)	17.4% (28)	59% (95)	31.1% (50)	62.7% (101)	9.9% (16)	0	9.9% (16)	0

NS, not significant.

§ One-tailed Fisher’s exact test was used for comparison of hospital-acquired and dental-root canal groups.