Table 4: Level of antibiotic resistance among Colombian ETEC clinical isolates.

AntibioticsETEC isolates number (%)
SusceptibleIntermediateResistant

Cefazolin (CZ) 29 (72.5)5 (12.5)6 (15.0)
Ceftriaxone (CRO) 40 (100)0 (0)0 (0)
Ampicillin (AM) 8 (20.0)5 (15.0)27 (67.5)
Amoxicillin/clavulanic acid (AMC) 25 (62.5)13 (32.5)2 (5.0)
Ceftazidime (CAZ) 40 (100)0 (0)0 (0)
Cefuroxime (CXM) 39 (97.5)1 (2.5)0 (0)
Cefepime (FEP) 40 (100)0 (0)0 (0)
Ciprofloxacin (CIP) 40 (100)0 (0)0 (0)
Gentamicin (GM) 39 (97.5)0 (0)1 (2.5)
Meropenem (MEM) 39 (97.5)0 (0)1 (2.5)
Sulfamethoxazole (STX) 17 (42.5)1 (2.5)22 (55.0)
Piperacillin/tazobactam (TZP) 40 (100)0 (0)0 (0)

Four ETECs resistant to a single antibiotic (AM); 15 resistant to 2 antibiotics (AM and STX), 7 ETEC resistant to 3 antibiotics (AM-STX-CZ or AM-STX-GM or AM-STX-AMC), and a single ETEC resistant to 4 antibiotics (AM, STC, CZ, and AMC).