Table 3.
CRISPR-cas operon structure and array profile variation in Cronobacter spp.
| Cronobacter species | Sequence type or clonal complex | Number of strains | Operon structure typea | Maximum number of CRISPR arrays per strain | Maximum number of spacers per strain | Reference |
|---|---|---|---|---|---|---|
| 76, 77, 79, 80, 106, 213, | ||||||
| C. dublinensis | 301, 341, 346, 388, 389 | 13 | I-Eb | 4 | 66 | This study |
| C. dublinensis | 80, 95, 409 | 4 | I-Fc | 5 | 47 | This study |
| C. dublinensis | 70, 74, 389 | 3 | No cas genes | 1 | 14 | This study |
| C. muytjensii | 407, 411 | 2 | I-E | 2 | 20 | This study |
| C. muytjensii | 81 | 5 | I-F | 3 | 45 | This study |
| C. muytjensii | 294, 347, 403 | 3 | No cas genes | 1 | 15 | This study |
| C. sakazakii | CC4 | 25 | I-E | 2 | 23 | [1] |
| C. sakazakii | CC1 | 29 | I-E | 3 | 30 | [1] |
| C. sakazakii | 12 | 8 | I-E | 3 | 11 | [1] |
| C. sakazakii | 8 | 8 | I-E | 4 | 18 | [1] |
aAs defined by Makarova et al 2011; bI-E (Ecoli or CASS2) composed of cas3, cse1, cse2, cas7, cas5, cas6e, cas1, cas2 ;cI-F (Ypest or CASS3) composed of cas1, cas2-3, csy1, csy2, csy3, cas6f;dSpecies type strain analyzed.