Table 1.

Summary of the results of PCR for detecting Cas and CRISPR genes. The number of strains having one or both genes, and those devoid of any gene, are shown.

Profile	CRISPR1	CRISPR2	CRISPR3	Cas 1	Cas 3	No. of Strains
1						19
2						10
3						7
4						4
5						2
6						6
7						16
8						4
9						3
10						1
11						1
12						1
13						1
14						1
15						1
16						2
17						2
18						1
19						1
20						2
21						3
22						9
23						3

Negative; Positive.