Table 2. Distribution of AMR genes in ST2 and ST164 CRAB isolates.
| AMR gene | ST2 (n=106) | ST164 (n=19) | χ 2 | P value | ||
|---|---|---|---|---|---|---|
| Isolate (n) | Prevalence (%) | Isolate (n) | Prevalence (%) | |||
| aac(3)-Ia | 6 | 5.66 | 0 | 0.00 | – | 0.590 |
| ant(3″)-Ia | 4 | 3.77 | 0 | 0.00 | – | 1.000 |
| aph(3′)-Ia | 64 | 60.38 | 1 | 5.26 | 19.608 | <0.001 |
| aph(3″)-Ib, aph(6)-Id | 106 | 100.00 | 0 | 0.00 | 117.362 | <0.001 |
| aph(3′)-VI | 0 | 0.00 | 8 | 42.11 | 40.914 | <0.001 |
| armA | 80 | 75.47 | 0 | 0.00 | 39.832 | <0.001 |
| blaADC-25, blaOXA-23 | 106 | 100.00 | 19 | 100.00 | / | / |
| bla CARB-16 | 0 | 0.00 | 17 | 89.47 | 102.288 | <0.001 |
| bla NDM-1 | 0 | 0.00 | 18 | 94.74 | 109.755 | <0.001 |
| bla OXA-66 | 106 | 100.00 | 0 | 0.00 | 117.362 | <0.001 |
| bla OXA-91 | 0 | 0.00 | 19 | 100.00 | 117.362 | <0.001 |
| bla TEM-1D | 71 | 66.98 | 2 | 10.53 | 21.137 | <0.001 |
| catB8 | 16 | 15.09 | 0 | 0.00 | 2.076 | 0.15 |
| erm(C) | 5 | 4.72 | 2 | 10.53 | 0.223 | 0.637 |
| mph(E), msr(E) | 78 | 73.58 | 0 | 0.00 | 37.184 | <0.001 |
| sul1 | 17 | 16.04 | 0 | 0.00 | 2.294 | 0.13 |
| sul2 | 32 | 30.19 | 0 | 0.00 | 6.206 | 0.013 |
| tet(B) | 105 | 99.06 | 0 | 0.00 | 110.375 | <0.001 |
| tet(K) | 1 | 0.94 | 0 | 0.00 | – | 1.000 |
-,
– Fisher’s exact test was used when the expected count in at least one cell was <1, yielding exact P-values without chi-square approximation (χ2 statistic not reported).
/,
Statistical analysis not performed due to identical resistance rates.
Bold value, P<0.05.