2Bradford PA.Extended spectrum beta lactamases in the 21stcentury:characterization,epidemiology,and detection of this important resistantance[J].Clin Microbiol Rev,2001,14(4):933 -951.
4Tenover FC,Raney PM,Williams PP,et al.Evaluation of the NCCLS extended-spectrum beta-lactamase confirmation methods for Escherichia coli with isolates collected during Project ICARE[J].J Clin Microbiol,2003,41 (7):3142-3146.
5Steward CD,Rasbeed JK,Hubert SK,et al.Characterization of clinical isolates of Klebsiella pneumoniae from 19 laboratories using the National Committee for Clinical Laboratory Standards extended-spectrum beta-lactamase detection methods[J].J Clin Microbiol,2001,39 (8):2864 -2872.
6Queenan AM,Foleno B,Gownley C,et al.Effects of inoculum and beta-lactamase activity in AmpC-and extended-spectrum beta-lactamase (ESBL)-producing Escherichia coli and Klebsiella pneumoniae clinical isolates tested by using National Committee for Clinical Laboratory Standards ESBL methodology[J].J Clin Microbiol,2004,42 (1):269-275.
7Cagatay AA,Kocagoz T,Eraksoy H.Dio-Sensimedia:a novel culture medium for rapid detection of extended spectrum beta-lactamases[J].BMC Infect Dis,2003,25(3):22.
8Thomson KS,Sanders CC.Detection of extended-spectrum beta-lactamases in members of the family Enterobacteriaceae:comparison of the double -disk and three-dimensional tests Antimicrob[J].Agents Chemother,1992,36:1877-1882.
9Menon T,Bindu D,Kumar CP,et al.Comparison of double disc and three dimensional methods to screen for ESBL producers in a tertiary care hospital[J].Indian J Med Microbiol,2006,24 (2):117-120.
10Marra AR,Pereira CA,Castelo A,et al.Health and economic outcomes of the detection of Klebsiella pneumoniae-produced extended-spectrum beta-lactamase (ESBL) in a hospital with high prevalence of this infection[J].Int J Infect Dis,2006,10(1):56 -60.
2Ambler RP.The structure of beta-lactamases.Philos Trans R Soc Loud B Biol Sci,1980,289(1036):321-331.
3Bush K,Jacoby GA,Medeiros AA.A functional classification scheme for beta-lactamases and its correlation with molecular structure.Antimicrob Agents Chemother,1995,39 (6):1211-1233.
4Helfand MS,Bonomo RA.Beta-lactamases:a survey of protein diversity.Curr Drug Targets Infect Disord,2003,3 (1):9-23.
5www.lahey.org/studies/webt.htm.
6Patricia A.Extended-spectrumβ-lactamases in the 21st century:characterization,epidemiology,and detection of this important resistance threat.Clin Microbiol Rev,2001,14(4):933-951.
7Neuwirth C,Madec S,Siebor E,et al.TEM-89 beta-lactamase produced by a Proteus mirabilis clinical isolate:new complex mutant (CMT 3) with mutations in both TEM-59 (IRT-17) and TEM-3.Antimicrob Agents Chemother,2001,45(12):3591-3594.
8Ma L,Alba J,Chang FY,et al.Novel SHV-derived extended-spectrum beta-lactamase,SHV-57,that confers resistance to ceftazidime but not cefazolin.Antimicrob Agents Chemother,2005,49(2):600-605.
9Shah AA,Hasan F,Ahmed S,et al.Characteristics,epidemiology and clinical importance of emerging strains of Gramnegative bacilli producing extended-spectrum beta-lactamases.Res Microbiol,2004,155 (6):409-421.
10Fiett J,Palucha A,Miaczynska B,et al.A novel complex mutant beta-lactamase,TEM-68,identified in a Klebsiella pneumoniae isolate from an outbreak of extended-spectrum betalactamase-producing Klebsiellae.Antimicrob Agents Chemother,2000,44 (6):1499-1505.
7Gerhard F,Weldhagen L,Poirel PN. Ambler class A extend- ed-spectrum β-laetamases in Pseudomonas aeruglnosa: novel developments and clinical impact[J]. Antimicrob Agents and Chemother, 2003,47(8) : 2385-2392.
8Zhang ZJ,Guo XB,Zhang QX. Prevalence characterization of extended-spectrum beta-lactamases among Escherichia coli isolates collected in Zhengzhou[J]. J Clin Lab Analysis,2009, 23(6) 404-409.
9Coudron PE,Moland ES,Thomson KS.Occurrence and detection of AmpC beta-lactamases among Eschefichia coli,Klebsiella Pneumoniae.and Proteus mirabilis isolates at a veterans medical center.J Clin Microbiol,2000,38(5):1791-1796.
10Gniadkowski M.Evolution and epidemiology of extended-spectrum beta-lactamases(ESBLs)and ESBL-producing microorganisms.Clin Microbiol Infect,2001,7(11):597-608.
