0.05).Our results showed that,for recommended oral doses of ciprofloxacin and moxifloxacin,44.2% of E.coli isolates from the intestine of the health population,and 29.5%,18.7% and 10.7% of isolates from the three sterile sites of the patients,would be selected as resistant mutants.When ciprofloxacin and moxifloxacin were taken by injection route,the ratio of the selection of resistant mutants would be 9.3% for E.coli isolates from the intestine of the health population and 8.2%,6.2% and 8.9% for the three sterile sites of the patients,respectively.The maximum attainable concentration of levofloxacin in serum showed little distinction between the oral and the other routes.CONCLUSIONS The values of MIC and MPC of three fluoroquinolones in E.coli isolates from different populations and sites show no association.The values of MPC couldn't be predicted by the MIC.The values of MPC and MPC90 of three drugs show no significant discrepancy for tested isolates,these E.coli strains are isolated from the intestine of heath persons,and from the blood,ascites,bile of patients.

OBJECTIVE To investigate the susceptibility of Enterococcus faecalis and E.faecium isolated from system and urinary tract infected patients and provide data for anti-infection therapy.METHODS The susceptibility(MIC) of 249 Enterococcus strains was tested by agar dilution method.RESULTS All 249 strains of Enterococcus(117 strains of E.faecalis and 132 strains of E.faecium) were isolated from urinary tract or systemic infection patients.The isolated rate of E.faecalis(68.4%) was higher than that of E.faecium(50.0%) in urinary tract isolates.Meanwhile,the isolated rate of E.faecium(50.0%) was obviously higher than that of E.faecalis(31.6%) in systemic infection isolates.The drug susceptibility rate of E.faecalis was higher than that of E.faecium to gatifloxacin,ciprofloxacin,penicillin,ampicillin and high-level gentamicin but lower for minocycline.All Enterococcus were susceptible to vancomycin,teicoplanin and linezolid.They were almost 100.0% resistant to erythromycin.The susceptibility rate of E.faecalis(39.5%)was higher than E.f aecium(15.3%) to high-level gentamicin.The susceptibility rate of E.faecalis isolated from blood was higher than the strains isolated from urinary tract to all antibiotics.E.faecium isolated form blood was almost 100% resistant to gatifloxacin,ciprofloxacin,penicillin,ampicillin and erythromycin.CONCLUSIONS The drug susceptibility of E.faecalis and E.faecium which cause systemic and urinary tract infection is different.The available therapy project should be selected based on the resistance character.At present,vancomycin,teicoplanin and linezolid are the best choice for treatment against the infection caused by Enterococcus.

Lung transplantation is the only effective treatment of end-stage lung diseases. Nevertheless, shortage of donor lungs has become increasingly prominent worldwide. A large quantity of patients died while waiting for lung transplantation. Urgent lung transplantation is a prioritized allocation strategy for donor lung transplantation according to the urgency of diseases, aiming to shorten the waiting time for donor lungs and reduce the fatality of patients on the waiting list for lung transplantation. However, no consensus has been reached worldwide on the definition, criteria and application of the terminology of urgent lung transplantation. In addition, the survival and net benefits of lung transplant recipients based on this allocation system are still controversial. On the basis of previous clinical research on urgent lung transplantation, the definition criteria, risk factors, survival outcomes, limitations and optimization measures were explicitly elucidated in this article, aiming to provide theoretical reference for comprehensive evaluation of the feasibility of urgent lung transplantation and further optimizing the allocation system of donor lungs.