A lot of samples tested daily in clinical medical labs may contain one or more kinds of disease pathogeny which are potentially of biodamage toward surroundings and staff in the lab.Biosafety has since been an internationally important topic as public health control and the controllers' health under great negative impact.Following are some strategy which deserve more attention to strengthen our scientific management efficiency in biosafety of medical labs:(1)conduct bio-risk evaluation of the lab; (2) scientifically arrange layout and analysis proccsses in labs;(3 )providc with biosaf(e)ty instruments;(4)set up document series of biosafety; (5)strengthen safety protection on lab staffs;(6)handle samples and medical waste properly.

Objective To monitor the distribution and resistance of enteric pathogenic bacteria in Beijing area to offer the data for guiding epidemiologic study and clinical treatment. Methods Enteric pathogenic bacteria were cultured and identified to spicies, group, and serotype with the biochemical and serologic test. Then, the susceptibility of bacterium to antimicrobial agents were tested. Results Enteric pathogenic bacteria infection occurred with male, children, and youth being prominant. It peaked in June and July. Shigellae spp and Vibrio spp were the main pathogenic bacteria of intestinal tract. There presented difference among the sensitive rates of differential spicies, or groups to antimicrobial agents. Conclusions There are many spicies of enteric pathogenic bacteria causing infective diarrhea in Beijing area. Their distributions are different in sex, age and season. The is resistance rate are different needing surveillance.

Objective To investigate infection rate and susceptibility to antimicrobial agents of Mycoplasma urealyticum and Mycoplasma hominis in the genitourinary tract, and to provide a reference for clinical diagnosis and therapy. Methods Genitourinary secretions were collected with swabs. They were cultured with the diagnostic kit of Mycoplasma (Biomerieux Company) to detect M. urealyticum and M. hominis. Meanwhile the susceptibility of Mycoplasma against 9 antimicrobial agents was tested with the same kit. According to the manual of the kit, the results were read. The data were statistically analyzed with WHONET5.1 and SPSS. Results A total of 1 008 samples were collected, and the positive rate was 77.5%. Among 781 positive cases of Mycoplasma, 572 were M. urealyticum(56.0%), 40 were M. hominis (4.0%), and 169 were M. urealyticum combined with M. hominis (16.7%). The susceptibility rate of M. urealyticum to Doxycycline, Josamycin, Ofloxacin, Erythromycin, Tetracycline, Ciprofloxacin, Azithromycin, Clamycin and Pristinamycin was 89.3%, 95.1%, 17.5%, 64.3%, 84.1%, 14.8%, 77.8%, 90.8% and 96.5%, respectively. The susceptibility rate of M. hominis to the above drugs was 86.0%, 78.9%, 23.2%, 0, 73.2%, 57.1%, 0, 7.7% and 83.9%, respectively. The resistant rate of Mycoplasma to Azithromycin and Clamycin in 2004 was higher than that during the period of 2000 to 2003(P

BACKGROUND:Prosthesis selection for total hip replacement is determined by geometrical matching with femoral medullary cavity of patients and the optimal biodynamics.It is of great significance for elevating outcomes of total hip replacement.OBJECTIVE:To evaluate the biomechanics of four groups of femoral stem prostheses matched with a femar and to get a stem whose mechanics distribution is similar to the normal femur.DESIGN:Controlled observation.SETTING:Department of Orthopaedics of Oriental Hospital Affiliated to Tongji University,Department of Orthopaedics of Changhai Hospital of Second Military Medical University of Chinese PLA,and Department of Mechanical and Power Engineering of Shanghai Jiao Tong University.MATERIALS:Experiments were performed at the Laboratory of Life Quality and Machinery Engineering of Department of Mechanical and Power Engineering of Shanghai Jiao Tong University from December 2004 to October 2005.A male volunteer aged 40 years with the normal proximal ferout(175 cm height and 78 kg weight),free from hip disease,were selected.X-ray image of the eutopic femar was shot and wrote into memory in the format of DICOM.The volunteer signed an infonned consent.The experiment was approved by Hospital Ethical Committee.No.Ⅰ prosthesis,Zimmer versys Fiber Metal Taperl 1#,No.Ⅱ prosthesis,Plus APL 2#,No.Ⅲ prosthesis,Welink Ribbed system cementless01#,and No.Ⅳprosthesis,Lima F2L 1# were used in this study.METHODS:The ezDICOM software was used to read files with DICOM format of femoral X-ray image,which was converted into files with bmp format.The image files with bmp format of the proximal femar X ray were introduced with Matlab software after regulation,and the two-dimensional contour data of femar were extracted.Prosthesis matched with the template was set in PhotoShop 7.0 software.The two-dimensional contour data of prosthetic femar were extracted in MATLAB software.The ANSYS software was used to establish the model of geometrical and two-dimensional nonlinearity finite element ncluding femur and femur-femoral stem.Stress distribution in the proximal femur was analyzed and compared by loading.MAIN OUTCOME MEASURES:Stress istribution of the proximal femur.RESULTS:Stress value and distribution of No.Ⅰ prosthesis and No.Ⅳ prosthesis in proximal femur were similar to the normal femar.Moreover,No.Ⅰ prosthesis was better than No.Ⅳ prosthesis.CONCLUSION:The biomechanics of femoral stem prostheses has been evaluated by analyzing and comparing the two-dimensional biomechanics of the femoral stem prostheses based on X-ray and template,which can offer support in optimal rosthesis selection.

Objective To amplify the 16S RNA fragments of 7 clinically isolated strains of Brucella spp. by PCR-RFLP technique, so as to provide experimental basis for the studies on diagnostics, genetics and epidemiology of Brucella spp. Methods According to the gene sequence of ATCC 25840 standard strain in GenBank, special primers for the 16S RNA conservative area in the Brucella spp. were designed. DNA extraction and PCR amplification of the 16S RNA fragments were performed with the 7 isolated strains. PCR products were then sequenced and RFLP analysis was conducted with appropriate restricted enzymes to study the homology and the mutation sites in those strains. Meanwhile, the clinical data of infected patients were retrospectively analyzed to evaluate the relationship between the clinical features and genotypes of Brucella infection. Results The amplified target fragments were about 1500bp in length and consistent with what was expected. The sequencing and homology analysis showed a 98.88% homology and 11 mutation sites among the 7 isolated strains. Four genotypes were identified by RFLP. Retrospective analysis of the clinical data indicated that no obvious relationship existed between the genotypes and the clinical features. Conclusions Amplifying 16S RNA fragments by PCR technique is a feasible method to make an early diagnosis of Brucella infection. The 7 clinically isolated strains are different in genotypes and 16S RNA fragment is a highly conservative fragment in bacterial genome with some mutations. The research provides evidence for the genetics and epidemiology of brucellosis.

Objective To monitor features of diarrheogenic bacteria causing blood infection, so as to provide evidence for rational use of drugs in patients with cirrhosis of liver. Methods Diarrheogenic pathogens isolated from blood samples in 302 hospital of PLA from 2000 to 2010 were collected, and their components and antimicrobial resistance were analyzed. Blood samples were cultured with automated blood culture instrument (BACT/ALERT3D) and the bacteria of positive samples were identified by automated microorganism identification device (Vitek2). Furthermore, drug sensitivity test was performed by K-B method recommended by CLSI. Results A total of 140 strains of diarrheogenic bacteria were isolated from the blood samples of 140 patients, among them 117 (83.6%) were male, and the largest proportion (55.7%) of them were aged 40-60 years. The isolated diarrheogenic bacteria causing blood infection included the following genera: Aeromonas (75.71%), Salmonella (14.29%), Vibrio (9.29%) and Yersinia (0.71%). The sensitivity of these bacteria to antimicrobial drugs was different. The incidence of bacteria resistant to ampicillin and cefazolin was significantly higher, while that resistant to levofloxacin was significantly lower, and genus Aeromonas was more resistant than genus Salmonella (P<0.01). Multiple antimicrobial resistance was found in genus Aeromonas and genus Salmonella. Genus Vibrio was sensitive to most of antimicrobial drugs. Conclusions A variety of diarrheogenic bacteria with different degree of antibiotic resistance can cause blood infection, and much attention and monitoring should be strengthened.

OBJECTIVE To observe and compare the application result of two kinds of chemical indicator(CI)card contained in high pressure-steam sterilization chemical monitoring testing package for providing correct credible evidence of supplying material in each batch after high pressure-steam sterilization and to avoid resource lost because of fault estimation.METHODS The chemical monitoring testing package was made according Sterilization Criteria published in 2002,with the 3M 1250 and 1243 CI cards and 1292 biology indicator(BI) to observe the results in tested package after sterilization.RESULTS The BI in chemical monitoring testing package was all qualified,the qualified rate of 1250 was 70%,while of 1243 was 100%.CONCLUSIONS If there is no BI for monitoring,1243 CI card should be chosen in high pressure-steam sterilization chemical monitoring testing package for supplying material in each batch after high pressure-steam sterilization which is not influenced by moisture and the contacted material and is easy to read and evaluate,the resource lost caused by fault estimation can be avoided.

Aged ; Humans ; Lung ; pathology ; Male ; Middle Aged ; Pneumoconiosis ; complications ; diagnosis ; pathology ; Reference Standards

Objective To monitor the constituents and resistant tendency of bacterial pathogens isolated from diarrheal patients in our hospital form 1994 to 2005 to offer the basis for guiding epidemiologic study,vaccination research and clinical treatment. Methods Enteric pathogenic bacteria were cultured and identified to species,group and serotype with biochemical and serologic methods and the susceptibility of bacteria to antimicrobial agents were tested. Results Enteric pathogenic bacteria were isolated predominantly in male patients and mainly in children and youngsters. It reached a peak from July to September every year. Shigella spp.(75.11%) was the most frequendy isolated pathogens and followed by Vibrio spp.(12.7%),Salmonella spp.(6.28%),Aeromonas spp.(4.43%) and Escherichia coli(1.25%).During the period from 1994 to 2005,diarrheal pathogens had a trend of decrease especially Shigella spp.and Salmonella spp.. Of the 6329 isolates of Shigella spp., 75.62% was S. flexneri and S.soanei,S.dysenteriae and S. boydii constituted 23.98%,0.22% and 0.01% respectively.The sensitivity of different species,group or serotype to different antimicrobial agents was not the same.S.flexneri and Aeromonas spp. were highly resistant to most of antibiotics. However, S.sonnei and Vibrio spp.had good susceptibility to antibiotics tested except trimethoprim/sulfamethoxazole and ampicillin. Conclusion There are many species and serotypes of enteric pathogenic bacteria causing infective diarrhea and the distribution changes gradually in Beijing. The resistance rate of enteric pathogenic bacteria to antibiotics is not the same in different species and serotypes.so strict surveillance iS always needed.

Objective To investigate antimicrobial resistance of Escherichia coli (E.coli )isolated from patients with bloodstream infection,and provide evidence for rational use of antimicrobial agents in clinical practice.Methods BacT/A-lert automated blood culture system and VITEK 2 automated identification system were used for bacterial culture and identi-fication.Antimicrobial susceptibility testing and detection of extended-spectrum β-lactamases (ESBLs)-producing strains were performed by Kirby-Bauer method.Results From 2009 to 2011 ,a total of 235 strains of E.coli were isolated from patients with bloodstream infection,90 (38.30%)of which were ESBLs positive strains.The resistant rates of ESBLs-producing strains to ampicillin,cefotaxime and ceftriaxone were all 100%,but susceptibility rate to imi-penem/cilastatin and meropenem were all 100%,to cefmetazole and amikacin were >90%.The resistant rate of non-ESBLs-producing strains to ampicillin was the highest (70.63%),susceptibility rate to imipenem/cilastatin and meropenem were both 100%,to amikacin,cefotaxime,and cefmetazole were all >95%.The resistant rate of ES-BLs-producing strains was significantly higher than that of the non-ESBLs-producing strains.Ofβ-lactamase inhibi-tor,only susceptibility rate of ESBLs-producing E.coli to cefoperazone/sulbactam was>90%,susceptibility rates to piperacillin/tazobactam and ticarcillin/clavulanate were both<80%.Conclusion Antimicrobial resistant rate of ESBLs-producing strains causing bloodstream infection is high,individualized treatment strategies should be made according to antimicrobial resistance of bacteria causing infection in patients.