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Hu, F.-P.; Guo, Y.; Zhu, D.-M.; Wang, F.; Jiang, X.-F.; Xu, Y.-C.; Zhang, X.-J.; Zhang, C.-X.; Ji, P.; Xie, Y.; Kang, M.; Wang, C.-Q.; Wang, A.-M.; Xu, Y.-H.; Shen, J.-L.; Sun, Z.-Y.; Chen, Z.-J.; Ni, Y.-X.; Sun, J.-Y.; Chu, Y.-Z.; Tian, S.-F.; Hu, Z.-D.; Li, J.; Yu, Y.-S.; Lin, J.; Shan, B.; Du, Y.; Han, Y.; Guo, S.; Wei, L.-H.; Wu, L.; Zhang, H.; Kong, J.; Hu, Y.-J.; Ai, X.-M.; Zhuo, C.; Su, D.-H.; Yang, Q.; Jia, B.; Huang, W.
Clinical microbiology and infection, 03/2016, Volume: 22Journal Article
With the aim of gathering temporal trends on bacterial epidemiology and resistance from multiple laboratories in China, the CHINET surveillance system was organized in 2005. Antimicrobial susceptibility testing was carried out according to a unified protocol using the Kirby-Bauer method or automated systems. Results were analyzed according to Clinical and Laboratory Standards Institute (CLSI) 2014 definitions. Between 2005 and 2014, the number of bacterial isolates ranged between 22 774 and 84 572 annually. Rates of extended-spectrum β-lactamase production among Escherichia coli isolates were stable, between 51.7 and 55.8%. Resistance of E. coli and Klebsiella pneumoniae to amikacin, ciprofloxacin, piperacillin/tazobactam and cefoperazone/sulbactam decreased with time. Carbapenem resistance among K. pneumoniae isolates increased from 2.4 to 13.4%. Resistance of Pseudomonas aeruginosa strains against all of antimicrobial agents tested including imipenem and meropenem decreased with time. On the contrary, resistance of Acinetobacter baumannii strains to carbapenems increased from 31 to 66.7%. A marked decrease of methicillin resistance from 69% in 2005 to 44.6% in 2014 was observed for Staphylococcus aureus. Carbapenem resistance rates in K. pneumoniae and A. baumannii in China are high. Our results indicate the importance of bacterial surveillance studies.
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