Table 1.
Number (%) of clinical isolates sequenced that were determined to belong to an outbreak (as defined in Methods), by bacterial species, November 2021 – November 2023
| Organism | Collected | Unique Patients | No. in Outbreak (%) | No. Outbreaks |
|---|---|---|---|---|
|
| ||||
| Acinetobacter species | 121 | 115 | 22 (19.1) | 9 |
|
| ||||
| Burkholderia species | 26 | 16 | 0 (0) | 0 |
|
| ||||
| Citrobacter species | 92 | 81 | 4 (4.9) | 2 |
| Clostridioides difficile | 251 | 245 | 19 (7.8) | 7 |
| Enterobacter cloacae | 88 | 79 | 9 (11.4) | 4 |
| Escherichia coli, ESBL producing | 291 | 246 | 22 (8.9) | 9 |
|
| ||||
| Klebsiella oxytoca | 48 | 45 | 4 (8.9) | 2 |
|
| ||||
| Klebsiella pneumoniae, ESBL producing | 247 | 188 | 55 (29.3) | 19 |
| Legionella species | 0 | 0 | 0 (0 | 0 |
| Methicillin-resistant Staphylococcus aureus | 656 | 573 | 52 (9.1) | 23 |
| Proteus mirabilis | 556 | 463 | 21 (4.5) | 9 |
|
| ||||
| Providencia species | 70 | 63 | 2 (3.2) | 1 |
|
| ||||
| Pseudomonas aeruginosa | 1379 | 1029 | 114 (11.1) | 44 |
| Pseudomonas species, not aeruginosa | 58 | 57 | 2 (3.5) | 1 |
| Raoultella species | 2 | 2 | 0 (0) | 0 |
| Serratia marcescens | 347 | 282 | 15 (5.3) | 7 |
|
| ||||
| Stenotrophomonas maltophilia | 252 | 211 | 13 (6.2) | 6 |
| Vancomycin-resistant Enterococcus faecalis | 4 | 4 | 0 (0) | 0 |
| Vancomycin-resistant | 240 | 228 | 122 (53.5) | 29 |
|
| ||||
| Enterococcus faecium | ||||
| Total | 4723 | 3921 | 476 (12.1) | 172 |
ST: Sequence type; ESBL: Extended-spectrum beta-lactamase