TABLE 2.
Antimicrobial resistance results and correlation with ST types and antibiotic resistance genes
| Drug (concn range [μg/ml]) |
No. of resistant isolates (%)a |
STb | No. of genes identifiedb | MIC (μg/ml)b |
|---|---|---|---|---|
| MXF (0.002–32) | 21 (56.76) | ST81 (4), ST109 (1), ST37 (16) |
E. coli gyrB (37), M. tuberculosis gyrA (18), C. jejuni gyrA (20) |
≥32 (21) |
| LVX (0.002–32) | 36 (97.30) | ST332 (1), ST39 (1), ST109 (1), ST81 (4), ST37 (29) |
As above | ≥32 (35) |
| ≥8 < 32 (1) | ||||
| CIF (0.002-32) | 37 (100) | ST332 (1), ST39 (1), ST109 (1), ST81 (4), ST37 (30) |
As above | ≥32 (36) |
| ≥8 < 32 (1) | ||||
| CLI (0.016–256) | 33 (89.19) | ST81 (4), ST109 (1), ST37 (28) | ermB (25), cfrC (4), clbA (11) | ≥256 (32) |
| ≥8 < 256 (1) | ||||
| TET (0.016–256) | 13 (35.14) | ST81 (2), ST37 (11) |
tetA(P), tetT, tetpb, tetpa were only in isolate 11032; tetA(48)c was only in ZR18; tetM (31), tet44 (30) |
≥16 < 32 (13) |
| ERY (0.016–256) | 34 (91.89) | ST81 (4), ST39 (1), ST109 (1), ST37 (28) |
ermB (25), macB (37), cfrC (4) | ≥256 (32) |
| ≥128 < 256 (2) | ||||
| ≥8 < 128 (1) | ||||
| CHL (0.016–256) | 11 (29.73) | ST37 (11) |
cata11 was only in ZR18; cata1 was only in M68 |
≥256 (8) |
| ≥128 < 256 (1) | ||||
| ≥32 < 128 (2) | ||||
| MEM (0.002–32) | 19 (51.35) | ST81 (1), ST109 (1), ST37 (17) | blaR1 (36), mecI (35) | ≥32 (15) |
| ≥16 < 32 (4) | ||||
| RIF (0.002–32) | 18 (48.65) | ST37 (18) | rpoB (36), rphB (34) | ≥32 (18) |
| VAN (0.016–256) | 0 | 0 |
vanXYG-vanSG-vanTG-vanG gene cluster was only in ZR18; vanRI (37), vanRM (37), vanRA (37), vanRF (36), vanZF (36), vanRE (37), vanRB (37), vanSA (36), vanRG (37), arlR (34) |
≤0.5 |
| MET (0.016–256) | 0 | 0 | None | ≤1 |
a
Values in parentheses show the percentage of isolates resistant to a single drug.
b
Values in parentheses show the number of isolates with the ST, gene, or MIC.
c
Gene name.