KPC-2基因在克雷伯菌屬中傳播機制研究
[Abstract]:Objective To study the mechanism of the resistance of Klebsiella to imipenem and the mechanism of the KPC-2 gene in the genus Klebsiella. Methods The isolates of Imipenem-resistant Klebsiella bacteria isolated from the two stages (2009-2010 and 2012-2013) of the West China Hospital of Sichuan University were collected. The minimal inhibitory concentration (MIC) of imipenem, the CARB ChromeID plate and the modified Hodges test were used to detect the resistance phenotype of carbapenem, and the expression of the KPC-2 gene of the bacteria was detected by PCR. Plasmid-binding assay was used to detect plasmid propagation. RAPD and ERIC-PCR were used to analyze the homology of plasmid and strain. Results Three strains of Klebsiella pneumoniae resistant to imipenem were first screened and confirmed to be resistant to carbapenem antibiotics. The second stage of screening and confirmation of imipenem-resistant 7 strains of Klebsiella pneumoniae showed the same acquired resistance. PCR showed that 10 strains of bacteria carried the KPC-2 type gene. The plasmid-binding assay shows that the plasmid carrying the KPC-2 gene in the acid-producing klebsiella can be transferred to the recipient bacterium and has homology with the plasmid carried in the klebsiella pneumoniae positive by the KPC-2 gene. The results of ERIC-PCR show that the 7 KPC-2 gene-positive Klebsiella pneumoniae has homology. Conclusion The main drug-resistant mechanism of Klebsiella pneumoniae and klebsiella for imipenem-resistant Klebsiella pneumoniae isolated from West China Hospital of Sichuan University is the production of the KPC-2 carbapenem. The klebsiella-producing klebsiella carries the KPC-2 gene plasmid, and the plasmid has the transmission property and is the same as that of the Klebsiella pneumoniae carrying plasmid. The transmission forms of the drug-resistant strains in Klebsiella pneumoniae are the same and the transmission of drug-resistant strains in the genus Klebsiella is the same as that of the same plasmid.
【作者單位】: 四川大學(xué)華西醫(yī)院實驗醫(yī)學(xué)科;
【基金】:國家自然科學(xué)基金(No.81000712)資助
【分類號】:R440
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