title: Quality control limits for microdilution susceptibility tests with norfloxacin.
abstract: A multilaboratory study was designed to define quality control limits for microdilution susceptibility tests with norfloxacin. The following limits were proposed: for Escherichia coli ATCC 25922, 0.03 to 0.125 micrograms/ml; for Pseudomonas aeruginosa ATCC 27853, 1.0 to 4.0 micrograms/ml; for Staphylococcus aureus ATCC 29213, 0.5 to 2.0 micrograms/ml; and for Streptococcus faecalis ATCC 29212, 2.0 to 8.0 micrograms/ml. The latter represents a change in the previously recommended control limits.
mesh_terms: D013293:Enterococcus faecalis / Q000187:drug effects*; D004926:Escherichia coli / Q000187:drug effects*; D008826:Microbial Sensitivity Tests / Q000592:standards; D009643:Norfloxacin / Q000494:pharmacology*; D011446:Prospective Studies; D011550:Pseudomonas aeruginosa / Q000187:drug effects*; D011786:Quality Control; D013211:Staphylococcus aureus / Q000187:drug effects*
chemical_list: D009643:Norfloxacin