Article 4 ampicillin 4 antibiotic sensitivity 4 cefoxitin chloramphenicol 4 ciprofloxacin 4 gentamicin 4 tetracycline 4 amoxicillin plus clavulanic acid 3 antibiotic resistance 3 cefotaxime 3 ceftazidime 3 ceftriaxone 3 cotrimoxazole 3 human 3 imipenem 3 nonhuman 3 Bacterial Typing Techniques 2 Escherichia coli 2 Humans 2 amikacin 2 bacterial strain 2 bacterium identification 2 classification 2 colistin 2 controlled study 2 ertapenem 2 genotyping 2 levofloxacin 2 microbiology 2