XU Biao, et al. Analysis of drug resistance and genotype of extended-spectrumβ-lactamase producing Enterobacteriaceae bacteria[J]. Journal of Chongqing Medical University, 2004,(6):781-783.
XU Biao, et al. Analysis of drug resistance and genotype of extended-spectrumβ-lactamase producing Enterobacteriaceae bacteria[J]. Journal of Chongqing Medical University, 2004,(6):781-783. DOI: 10.13406/j.cnki.cyxb.2004.06.022.
Objective:To investigate the drug resistance and genotypes of extended-spectrum β-lactamase(ESBL)-producing Enterobacteriaceae bacteria in our hospital.Methods:257 strains of Enterobacteriaceae bacteria were isolated from clinical specimens in our hospital from Sept.2002 to Oct.2003.Sixty-three strains of ESBLs-producing isolates were detected by phenotypic confirmatory test according to NCCLS M100-S9.The susceptibility test of them to the antibiotics were detected with Bio-Merieux ATB G-5.The SHV-type
TEM-type
CTX-M-type encoding genes were amplified by PCR.Results:The resistant rates of the 63 strains to IMP
MERO
CXT
FEP
CAZ
AKN
CTX and CIP were 1.6%
1.6%
38.1%
39.7%
46.0%
55.6%
63.5% and 95.2%
repectively.The rates of Enterobacteriaceae bacteria carrying SHV-type
TEM-type
CTX-M-type ESBLs were 84.1%
47.6% and 25.4%
repectively.Conclusion:Multidrug resistance of the ESBLs-producing strains in our hospital is obvious.IMP and MERO are still the best choices for treatment of the infections caused by ESBLs-producing bacteria.Most of the ESBLs-producing strains carry SHV-type.CTX-M-type β-lactamase exists prevalently in our hospital.