Table 3.
Isolate characteristics of 3GCREB isolates recovered by all 4 algorithms
| Strain characteristics | Overall (n = 97) | 3GCREB isolates recovered by | |||||
|---|---|---|---|---|---|---|---|
| Stool without pre-enrichment (A) (n = 68) | Stool with pre-enrichment (B) (n = 81) | Rectal swab without pre-enrichment (C) (n = 63) | Rectal swab with pre-enrichment (D) (n = 75) | Without pre-enrichment total (A + C) (n = 71) | With pre-enrichment total (B + D) (n = 94) | ||
| Species 3GCREB | |||||||
| Escherichia coli | 45 (46.4%) | 42 (61.8%) | 41 (50.6%) | 37 (58.7%) | 37 (49.3%) | 42 (59.2%) | 43 (45.7%) |
| Klebsiella species | 11 (11.3%) | 6 (8.8%) | 11 (13.6%) | 5 (8.0%) | 7 (9.3%) | 7 (9.9%) | 11 (11.7%) |
| Enterobacter species | 12 (12.4%) | 8 (11.8%) | 11 (13.6%) | 9 (14.3%) | 11 (14.7%) | 9 (12.7%) | 12 (12.8%) |
| Citrobacter species | 25 (25.8%) | 10 (14.7%) | 15 (18.5%) | 9 (14.3%) | 18 (24.0%) | 10 (14.1%) | 25 (26.6%) |
| Others | 4 (4.1%) | 2 (2.9%) | 3 (3.7%) | 3 (4.8%) | 2 (2.7%) | 3 (4.2%) | 3 (3.2%) |
| Resistance mechanism | |||||||
| ESBL (no. (%)) | 54 (55.7%) | 47 (69.1%) | 49 (60.5%) | 43 (68.3%) | 44 (58.7%) | 49 (69.0%) | 52 (55.3%) |
| CTX-M-1 (no. (% of ESBL)) | 33 (61.1%) | 30 (63.8%) | 31 (63.3%) | 29 (67.4%) | 28 (63.6%) | 32 (65.3%) | 32 (61.5%) |
| CTX-M-9 (no. (% of ESBL)) | 9 (16.7%) | 7 (14.9%) | 8 (16.3%) | 6 (14.0%) | 8 (18.2%) | 7 (14.3%) | 9 (17.3%) |
| Unknown ESBL mechanism | 12 (22.2%) | 10 (21.3%) | 10 (20.4%) | 8 (18.6%) | 8 (18.2%) | 10 (20.4%) | 11 (21.2%) |
| AmpC (no. (%)) | 36 (37.1%) | 15 (22.1%) | 25 (30.9%) | 15 (23.8%) | 26 (34.7%) | 16 (22.5%) | 35 (37.2%) |
| Hyper K1 (no. (%)) | 1 (1.0%) | 1 (1.5%) | 1 (1.2%) | 1 (1.6%) | 1 (1.3%) | 1 (1.4%) | 1 (1.1%) |
| VIM carbapenemase (no. (%)) | 2 (2.1%) | 1 (1.5%) | 2 (2.5%) | 1 (1.6%) | 1 (1.3%) | 1 (1.4%) | 2 (2.1%) |
| IMP carbapenemase (no. (%)) | 2 (2.1%) | 2 (2.9%) | 2 (2.5%) | 2 (3.2%) | 2 (2.7%) | 2 (2.8%) | 2 (2.1%) |
| SHV-1 (no. (%)) | 2 (2.1%) | 2 (2.9%) | 2 (2.5%) | 1 (1.6%) | 1 (1.3%) | 2 (2.8%) | 2 (2.1%) |
3GCREB, third-generation cephalosporin-resistant Enterobacterales
ESBL-E, extended-spectrum-beta-lactamase-producing Enterobacterales
If an Isolate harboured more than one resistance mechanism, it was classified in the highest resistance mechanism (carbapenemase > ESBL > AmpC > Hyper K1/SHV-1)