OBJECTIVE To investigate the distribution and resistance characteristic of Escherichia coli in order to provide reference for the clinical application of drugs.METHODS The strains of E.coli were detected and their sensitivity to antibiotics was determined by VITEK automatic bacterium identifying and drug sensitivity analyzing systems,then the specimens in which E.coli was detected and the result of sensitivity to antibiotics were analyzed.RESULTS Among 210 specimens in which E.coli was detected,the urine was the most frequent.There were 46 strains which produced extended-spectrum ?-lactamases(ESBLs),the ESBLs-producing rate of E.coli was 21.9%,the drug resistance of ESBLs producers was more serious than that of nonproducers.The resistant rate of ESBLs producers against penicillins was 100%,but the susceptibility rate was 19.6-84.8% while combined with the ?-lactamases inhibitors.The susceptibility rates of ESBLs producers to the antibiotics from the first generation cephalosporins to the third generation ones were 0.0-45.6%.The susceptibility rates of ESBLs producers to cefepime,cefoxitin,ciprofloxacin and Cotrimoxazole were 60.9%,34.8%,10.9% and 13.0%,respectively,whereas amikacin,imipenem,and meropenem were more effective against the bacteria,the susceptibility rates of ESBLs producers were 89.1%,97.8% and 97.8%,respectively.while all the nonproducers were susceptible to them.The ESBLs producers had high sensitivity to imipenem,meropenem,amikacin and piperacillin/tazobactam,and had high resistance to the other antimicrobial drugs,they showed multi-drug resistance.CONCLUSIONS It is rather serious the resistance of E.coli to usual antibiotics,and that of ESBLs producers is more serious.It should be cautious to use cephalosporins to treat infections caused by E.coli,carbapenem,amikacin and some of complex antibiotics containing ?-lactamases inhibitor are very effective to treat infections caused by ESBLs producers.It is very important to select rational drugs correctly for clinical treatment of the infections according to the results of antibiotics susceptibility tests.

OBJECTIVE To investigate the characteristic of clinical distribution and drug resistance of pathogenic bacteria in lower respiratory tract infection. METHODS Bacterial culture of the lower respiratory tract samples collected from patients who were admitted from Jan to May 2008 was done.The bacteria identification and drug sensitivity tests were done by VITEK bacterium identifying and drug sensitivity analyzing system. RESULTS A total of 502 pathogens were isolated,in which 340 strains of Gram-negative bacteria(67.7%),32 strains of Gram-positive cocci(6.4%)and 130 strains of fungi(25.9%).Of all the 372 strains of bacteria,the most common pathogens in turn were Acinetobacter baumannii,Pseudomonas aeruginosa,Klebsiella pneumoniae and Escherichia coli,respectively.Non-fermenters were the dominant pathogens in intensive care unit(ICU)and the surgery wards,Enterobacteriaceae and fungi were the dominant pathogens in the non-operation wards.Of A.baumannii strains,the antibiotic resistant rates to imipenem and meropenem were 7.5% and 8.8%,respectively,the resistant rates to the other antibiotics were high(53.8%-100.0%,respectively).Of P.aeruginosa strains,the antibiotic resistant rates to imipenem,meropenem,polymyxicn E,ciprofloxacin,amikacin,tobramycin and gentamicin were 11.1%-27.0%,respectively,The resistant rates to the other antibiotics such as penicillins,cephalosporins and the complex antibiotics containing ?-lactamases inhibitor were 38.1%-100.0%.The ESBLs-producing rate of K.pneumoniae strains(71.7%)was higher than that of E.coli strains(29.1%).K.pneumoniae strains and E.coli strains were all sensitive to imipenem and meropenem,and both of their resistant rates against amikacin were the same(10.9%),but against the other antibiotics the resistance of E.coli strains were more serious than that of K.pneumoniae strains. CONCLUSIONS In our area,non-fermenters are mainly isolated from ICU and the surgery wards.Enterobacteriaceae and fungi are mainly isolated from the non-operation wards.The major pathogens show multi-drug resistance except imipenem,meropenem and amikacin.It′s important to prevent hospital acquired lower respiratory tract infection during the clinical therapy,and it is urgent for rational use of antimicrobial agents according to the results of antibiotics susceptibility tests.

OBJECTIVEThis research aimed to investigate the expression of osteoprotegerin (OPG) and receptor activator of nuclear factor-κB ligand (RANKL) in mandibular distraction osteogenesis (DO) regulated by parathyroid hormone (PTH) and to explore the mechanism by which PTH promotes DO.

METHODSA rabbit mandibular DO model was established. The rabbits were randomly divided into experimental group and control group. The former were subcutaneously injected with different doses of PTH on alternate days, the latter was injected with normal saline every other day. Serum OPG levels were detected through enzyme-linked immunosorbent assay. The OPG and RANKL expression levels in the DO-induced formation of a new bone tissue were examined through immunohistochemistry staining.

RESULTSThe serum OPG levels gradually increased during distraction. At the end of the stretch, the OPG expression in the experimental group was significantly stronger than that in the control group. As the fixed period was extended, the OPG expression in the new bone gradually decreased, but the RANKL expression increased.

CONCLUSIONIntermittent subcutaneous PTH injection can upregulate the OPG expression and accelerate bone metabolism. Thus, this procedure promotes the early generation of a new bone in the mandible through DO.

Animals ; Enzyme-Linked Immunosorbent Assay ; Mandible ; NF-kappa B ; metabolism ; Osteogenesis, Distraction ; methods ; Osteoprotegerin ; metabolism ; Parathyroid Hormone ; metabolism ; RANK Ligand ; metabolism ; RNA, Messenger ; Rabbits ; Random Allocation

AIM:To investigate the effect of signal transducer and activator of transcription 1 ( STAT 1 ) on proliferation and interferon-β(IFN-β) sensitivity of human non-small-cell lung cancer H1299 cells.METHODS:STAT1 or EGFP gene was transfected into H1299 cells by the lentiviral vectors system.The cell number was counted under a mi-croscope and cell proliferation was tested by MTT assay.In addition, the cells transfected with STAT1 and EGFP were trea-ted with IFN-βand cell viability was measured by MTT assay.The protein levels of p-STAT1, ICAM-1 and PCNA were de-tected by Western blot.RESULTS: Over-expression of STAT1 inhibited H1299 cell proliferation (P<0.05).H1299 cells transfected with STAT1 gene had a higher sensitivity to IFN-βthan the control cells transfected with EGFP ( P <0.05).Overexpression of STAT1 increased the protein level of p-STAT1, and reduced IACM-1 expression in H1299 cells. Moreover, STAT1 enhanced STAT1 phosphorylation and downregulated the expression of PCNA in H1299 cells treated with IFN-β.CONCLUSION:STAT1 inhibits the proliferation and enhances the IFN-βsensitivity of non-small-cell lung cancer H1299 cells.

Background To explore the relationship between polymorphism of APOE gene in traumatic brain injury(TBI)patients suffering from traffic accident and the outcome of TBI.Methods TBI patients were randomly selected in this study with caxe-wntrol trial. The genotype of APOE allele was tested by a polymerase chain reaction-restriction fragment length polymorphism ( PCR-RFLP), and the association between different genotypes of APOE alleles and outcome of TBI patients, were analyed.Results In TBI group frequency of APOE ε2 allele was 0. 1010, and frequency of APOE ε2/ε3 was 0. 1596.Both of these results were significantly higher than that in normal people (APOE epsilon 2 was 0. 0050, APOE ε2/ε3 was 0. 0100) (P＜0.05). Frequency of APOE ε2 and APOE ε2/ε3 in TBI group who died was 0. 1970 and 0. 2727. These were significantly high compared to TBI patients who had good recovery.Conclusions APOE allele ε2 and APOE genotype ε2/ε3alleles indicate a poor prognosis of traumatic brain injury patients.

Giant intracranial aneurysms refers to the diameter of aneurysms larger than 2.5 cm,which belongs to the complicated aneurysms,accounting for about 5％ ofintracranial aneurysms;rupture of the aneurysms leads to extremely high disability rate and fatality rate.At present,surgical treatment,endovascular treatment and new composite (hybrid) surgery are the three major surgical approaches.We summarize the treatment approaches to promote an update on treatment of such aneurysms and give understanding on the development and direction of aneurysm treatment.

Objective To study the clinical curative effect of continuous intrathecal injec-tion of vancomycin controlled by microinjection pump in the treatment of intracranial infection. Methods 50 patients with intracranial infections from January 2009 to October 2012 were includ-ed in the research.22 patients treated with cerebrospinal fluid drainage from lumbar cistern and discontinuous intrathecal injection of vancomycin were in control group,and another 28 patients with continuous intrathecal injection of vancomycin by micropump were in the experimental group. Therapeutic effect was observed between the two groups.Results The patients in the control group improved more rapidly than those in the experimental group in the temperature,blood,cere-brospinal fluid and other observation index.Compared with the control group,the pain of lower back and leg,convulsions,headache and other side effects were significantly reduced in the experi-mental group.Conclusions Continuous drainage of cerebrospinal fluid in lumbar cistern and mi-croinjection pump control continuous intrathecal injection of vancomycin is a safe and effective method to treat intracranial infection.

Objective To explore the value of thinprep cytology in the diagnosis of thyroid nodules by thyroid fine needle aspiration.Methods Liquid-based thin-film cell production technology (TCT)and traditional producers technology (CS)were used in detection of 125 specimens by thyroid fine needle aspiration.Results TCT had the following characteristics :significant increased in cell number,cell morphology clear structure could be clearly observed especially pleomorphic nuclei,elon-gated or irregular nuclear membrane,nuclear grooves and nuclear inclusions,the cells showed a single layer arrangement,smear clean background,less blood cells and impurities.TCT and CS differences in the classification of cytologic diagnosis was obvious (χ2 =7.727,P =0.052 >0.05).TCT results in line with the pathological diagnosis was 98.9%,which was higher than CS and pathological diagno-sis compliance rate of 90.3% (χ2 =6.764,P =0.009 <0.05).Accuracy,sensitivity and specificity in TCT group were better than CS (P <0.01).Conclusion TCT producers can improve the quality of thyroid biopsy,sensitivity,specificity and accuracy of pathological diagnosis coincidence rate,so it is worthy of clinical application and popularization.

Objective To study the clinical curative effect of continuous intrathecal injec-tion of vancomycin controlled by microinjection pump in the treatment of intracranial infection. Methods 50 patients with intracranial infections from January 2009 to October 2012 were includ-ed in the research.22 patients treated with cerebrospinal fluid drainage from lumbar cistern and discontinuous intrathecal injection of vancomycin were in control group,and another 28 patients with continuous intrathecal injection of vancomycin by micropump were in the experimental group. Therapeutic effect was observed between the two groups.Results The patients in the control group improved more rapidly than those in the experimental group in the temperature,blood,cere-brospinal fluid and other observation index.Compared with the control group,the pain of lower back and leg,convulsions,headache and other side effects were significantly reduced in the experi-mental group.Conclusions Continuous drainage of cerebrospinal fluid in lumbar cistern and mi-croinjection pump control continuous intrathecal injection of vancomycin is a safe and effective method to treat intracranial infection.

Objective To explore the value of thinprep cytology in the diagnosis of thyroid nodules by thyroid fine needle aspiration.Methods Liquid-based thin-film cell production technology (TCT)and traditional producers technology (CS)were used in detection of 125 specimens by thyroid fine needle aspiration.Results TCT had the following characteristics :significant increased in cell number,cell morphology clear structure could be clearly observed especially pleomorphic nuclei,elon-gated or irregular nuclear membrane,nuclear grooves and nuclear inclusions,the cells showed a single layer arrangement,smear clean background,less blood cells and impurities.TCT and CS differences in the classification of cytologic diagnosis was obvious (χ2 =7.727,P =0.052 >0.05).TCT results in line with the pathological diagnosis was 98.9%,which was higher than CS and pathological diagno-sis compliance rate of 90.3% (χ2 =6.764,P =0.009 <0.05).Accuracy,sensitivity and specificity in TCT group were better than CS (P <0.01).Conclusion TCT producers can improve the quality of thyroid biopsy,sensitivity,specificity and accuracy of pathological diagnosis coincidence rate,so it is worthy of clinical application and popularization.