METHODS We had an observation on 20 strains of Klebsiella pneumoniae about 15 kinds of β-lactamase gene test(blaTEM,blaSHV,blaLEN,laOKP,blaCTX-M-1 group,blaCTX-M-2 group,blaCTX-M-9 group,blaOXA-1 group,blaOXA-2 group,blaOXA-10 group,blaGES,blaPER,blaVEB,blaDHA,and blaACT-1).

Study on the expression of high-level producing AmpC β-lactamase and ESBLs in Enterobacter;

Clinical Isolate of Escherichia coli Producing Extended-spectrum AmpC β-Lactamases(ESACs) with ClassⅠ Integron;

Study on the Drug Resistance and β-lactamases of Imipenem-resistant Pseudomonas Aeruginosa;

Analysis of beta-lactamase production and antibiotic resistance in clinically isolated Chryseobacterium spp;

Discovery of a Klebsiella pneumoniae Strain Carrying Six Kinds of Beta-lactamase Genes;

Relationship Between Isolation of ESBLs-producing Bacteria and Use of the Combinations of Beta-lactams and Beta-lactamase Inhibitors in Clinic;

β-Lactamases Gene of Multi-drug Resistant Acinetobacter baumannii:An Analysis of 20 Strains;

Genotyping of β-Lactamases and Preliminary Discovery of Acinetobacter-derived cephalosporinases AmpC Subtype from Acinetobacter baumannii;

Genotyping of β-lactamases from Acinetobacter baumannii in Xinjiang province;

β-lactamase production in multidrug-resistant Pseudomonas aeruginosa;

Comparison of ceftizoxime stability with other 14 β-lactams to β-lactamases;

Relationship between antimicrobial susceptibility and highly active β-lactamases in Pseudomonas aeruginosa;