Table 2.
Prevalence of qnr and aac(6′)-Ib-cr genes in water-borne environmental and clinical bacteria
| Resource | Strain | No. | Number of positive isolates (%) | |||||||
|---|---|---|---|---|---|---|---|---|---|---|
|
| ||||||||||
| qnrA | qnrB | qnrS | qnrA+qnrB | qnrS+qnrB | aac(6′)-Ib | aac(6′)-Ib-cr | ||||
| Aquatic environment | C. freundii | 10 | 0 | 8 (80.0) | 0 | 0 | 0 | 0 | 0 | |
| E. coli | 9 | 0 | 0 | 1 (11.1) | 0 | 0 | 1 (11.1) | 1 (11.1) | ||
| Aeromonas spp. | 21 | 0 | 0 | 1 (4.8) | 0 | 0 | 2 (9.5) | 0 | ||
| Others | 38 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | ||
|
| ||||||||||
| Hospital | C. freundii | Hangzhou | 51 | 3 (5.9) | 38 (74.5) | 0 | 4 (7.8) | 1 (2.0) | 25 (49.0) | 10 (19.6) |
| Wenzhou | 14 | 0 | 7 (50.0) | 0 | 0 | 0 | 2 (14.3) | 1 (7.1) | ||
| Shanghai | 7 | 0 | 4 (57.1) | 1 (14.3) | 1 (14.3) | 0 | 1 (14.3) | 1 (14.3) | ||
| Beijing | 31 | 0 | 16 (51.6) | 0 | 0 | 0 | 5 (16.1) | 0 | ||
| Total | 103 | 3 (2.9) | 65 (63.1) | 1 (1.0) | 5 (4.8) | 1 (1.0) | 33 (32.0) | 12 (11.6) | ||
| C. braakii | 7 | 2 (28.6) | 1 (14.3) | 0 | 0 | 0 | 4 (57.1) | 3 (42.9) | ||
| C. koseri | 9 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | ||
| C. amalonaticus | 3 | 0 | 1 (33.3) | 0 | 0 | 0 | 0 | 0 | ||