title: In Vitro Analysis of Activities of 16 Antimicrobial Agents against Gram-Negative Bacteria from Six Teaching Hospitals in China.
abstract: To evaluate the in vitro antimicrobial activities of biapenem, arbekacin, and cefminox against different gram-negative bacterial isolates in China, a total of 100 non-duplicated Escherichia coli, 100 Acinetobacter baumannii, 100 Pseudomonas aeruginosa, and 99 Klebsiella pneumoniae isolates were collected from 6 teaching hospitals in China in 2012. The minimal inhibitory concentrations (MICs) of biapenem, arbekacin, cefminox and 13 other antibiotics were determined by the broth microdilution method. The carbapenems (biapenem, meropenem, and imipenem) exhibited high antimicrobial activity against E. coli (98%) and K. pneumoniae (≥95%), followed by colistin and amikacin. The MIC50 and MIC90 of biapenem against E. coli were ≤0.06 mg/L and 0.25 mg/L, respectively. For K. pneumoniae, the MIC50 and MIC90 of biapenem were 0.25 mg/L and 1.0 mg/L, respectively. The MIC50 and MIC90 of cefminox against E. coli were 1.0 mg/L and 4.0 mg/L, respectively. The resistance rates of A. baumannii to most of the antibiotics were more than 50%, except for colistin. Amikacin was the most active antibiotic against P. aeruginosa (97%), followed by colistin (93%). The MIC50 and MIC90 of arbekacin against P. aeruginosa were 2.0 mg/L and 8.0 mg/L, respectively. In conclusion, carbapenems, colistin, amikacin, and arbekacin exhibited high antimicrobial activities against gram-negative bacteria, except A. baumannii.
authors: Department of Clinical Laboratory, Peking University People's Hospital.
authors: Hongbin
authors: H
authors: Chen
authors: Zhanwei
authors: Z
authors: Wang
authors: Henan
authors: H
authors: Li
authors: Qi
authors: Q
authors: Wang
authors: Chunjiang
authors: C
authors: Zhao
authors: Wenqiang
authors: W
authors: He
authors: Xiaojuan
authors: X
authors: Wang
authors: Feifei
authors: F
authors: Zhang
authors: Hui
authors: H
authors: Wang
mesh_terms: D000890:Anti-Infective Agents / Q000494:pharmacology*; D002681:China; D024881:Drug Resistance, Bacterial; D006090:Gram-Negative Bacteria / Q000187:drug effects* / Q000302:isolation & purification; D016905:Gram-Negative Bacterial Infections / Q000382:microbiology*; D006784:Hospitals, Teaching; D006801:Humans; D008826:Microbial Sensitivity Tests
chemical_list: D000890:Anti-Infective Agents