Table 2 MICs of β-lactam antibiotics for 38 cefazolin-resistant isolates of E. coli from diseased animals isolated between 2002 and 2006
MICs (μg/ml) of: | |||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|
Animal species | β-lactamase | n | Year isolated | Phylogenetic group | Cefazolin | Cefpodoxime | Cefotaxime | Ceftazidime | Aztreonam | Imipenem | Meropenem |
(32)* | (8) | (64) | (32) | (32) | (16) | (16) | |||||
Cattle | CTX-M-2 | 1 | 2003 (1) | A (1) | 256 | >32 | >32 | 4 | 16 | ≤1 | ≤4 |
CTX-M-2/TEM-1 | 1 | 2003 (1) | B1 (1) | 256 | >32 | >32 | 8 | >16 | ≤1 | ≤4 | |
CMY-2 | 1 | 2003 (1) | A (1) | 256 | 8 | ≤1 | ≤1 | ≤4 | ≤1 | ≤4 | |
CMY-2/TEM-1 | 1 | 2002 (1) | D (1) | 256 | >32 | 8 | 16 | ≤4 | ≤1 | ≤4 | |
TEM-1 | 1 | 2003 (1) | A (1) | 32 | 8 | ≤1 | 2 | ≤4 | ≤1 | ≤4 | |
ND | 1 | 2002 (1) | B1 (1) | 128 | 16 | ≤1 | 8 | ≤4 | ≤1 | ≤4 | |
Poultry | CTX-M-2 | 1 | 2006 | A (1) | >512 | >32 | >32 | 2 | ≤4 | ≤1 | ≤4 |
CTX-M-15/TEM-1 | 1 | 2006 | A (1) | >512 | >32 | >32 | 32 | 8 | ≤1 | ≤4 | |
CTX-M-25 | 4 | 2005(3), 2006 (1) | A (2), D (2) | >512 | >32 | 16->32 | 2-4 | ≤4-8 | ≤1 | ≤4 | |
SHV-2 | 3 | 2004 (3) | A (3) | 256-512 | 32->32 | 8-32 | 4-16 | ≤4-8 | ≤1 | ≤4 | |
CMY-2 | 10 | 2004(1), 2006 (10) | A (5), B1 (1), D (5) | 512->512 | >32 | 4-32 | 8-32 | ≤4-8 | ≤1 | ≤4 | |
TEM-1 | 7 | 2004 (2), 2005 (5) | A (7) | 64->512 | 16-32 | ≤1-2 | 4-8 | ≤4 | ≤1 | ≤4 | |
ND | 2 | 2002 (1), 2005 (1) | A (2) | 128-256 | 16-32 | ≤1-2 | 4 | ≤4 | ≤1 | ≤4 | |
Swine | CMY-2/TEM-1 | 1 | 2004 (1) | A (1) | >512 | >32 | 16 | 32 | 16 | ≤1 | ≤4 |
ND | 2 | 2002 (1), 2003 (1) | A (1), D (1) | 128-256 | 4-8 | ≤1 | ≤1 | ≤4 | ≤1 | ≤4 | |