TABLE 1.
Occurrences of ESBL, acquired cephalosporinases (AmpC), and carbapenemase enzymes detected among 701 ESBL-phenotype-positive strains collected in U.S. hospitals by U.S. census regions
| Region (no. of isolates tested) | No. of isolates (% of isolates tested by region) positive fora: |
|||||||
|---|---|---|---|---|---|---|---|---|
| CTX-M-15-like | SHV ESBL | KPC | CTX-M-14-like | CMY-2-like | FOX | TEM ESBL | DHA | |
| Overall (701) | 303 (43.2) | 176 (25.1) | 118 (16.8) | 72 (10.3) | 64 (9.1) | 10 (1.4) | 9 (1.3) | 7 (1.0) |
| New England (47) | 19 (40.4) | 9 (19.1) | 1 (2.1) | 5 (10.6) | 6 (12.8) | 2 (4.3) | ||
| Mid-Atlantic (143) | 50 (35.0) | 42 (29.4) | 58 (40.6) | 11 (7.7) | 15 (10.5) | 2 (1.4) | 2 (1.4) | 1 (0.7) |
| East North Central (99) | 50 (50.5) | 18 (18.2) | 13 (13.1) | 7 (7.1) | 6 (6.1) | |||
| West North Central (24) | 9 (37.5) | 1 (4.2) | 1 (4.2) | 4 (16.7) | 5 (20.8) | 2 (8.3) | ||
| South Atlantic (110) | 45 (40.9) | 37 (33.6) | 18 (16.4) | 10 (9.1) | 4 (3.6) | 3 (2.7) | 2 (1.8) | |
| East South Central (39) | 10 (25.6) | 11 (28.2) | 1 (2.6) | 3 (7.7) | 2 (5.1) | 4 (10.3) | 1 (2.6) | |
| West South Central (109) | 67 (61.5) | 30 (27.5) | 14 (12.8) | 9 (8.3) | 12 (11.0) | 1 (0.9) | 2 (1.8) | |
| Mountain (56) | 27 (48.2) | 10 (17.9) | 8 (14.3) | 9 (16.1) | 6 (10.7) | |||
| Pacific (74) | 26 (35.1) | 18 (24.3) | 4 (5.4) | 14 (18.9) | 8 (10.8) | 2 (2.7) | 2(2.7) | |
a
Various isolates were positive for one or more β-lactamase-encoding genes tested.