@article{MAKHILLJAVA201110182962, title = {In vitro Pharmacodynamics of Enrofloxacin Against an Escherichia coli gyrA Mutant}, journal = {Journal of Animal and Veterinary Advances}, volume = {10}, number = {18}, pages = {2384-2388}, year = {2011}, issn = {1680-5593}, doi = {javaa.2011.2384.2388}, url = {https://makhillpublications.co/view-article.php?issn=1680-5593&doi=javaa.2011.2384.2388}, author = {Ali,Erdem and}, keywords = {Turkey,Pharmacodynamic of enrofloxacin,Escherichia coli,C-T mutation,microdilution,significant}, abstract = {The aim of this study was to investigate in vitro the pharmacodynamics of Enrofloxacin (ENR) against an Escherichia coli gyrA mutant (E. coli MT/128). Broth microdilution testing was used to determine the Minimum Inhibitory Concentration (MIC) amd multi-step resistance selection was performed until reaching 1 μg mL•1 MIC. For time-kill experiments, colony counts were determined by plating each diluted sample onto Plate Count Agar and an integrated pharmacokinetic/pharmacodynamics area measure (log ratio area) was applied to all cfu data. A single C-T mutation was found in gyrA at codon 83. Concentration-dependent bacterial killing was observed for E. coli MT/128. Bactericidal activity for this strain was achieved within 4 h at concentrations • 8 times the MIC with no significant regrowth by 24 h.} }