Objective To investigate the clinical characteristics, risk factors and prevention measures of carbapenem-resistant Klebsiella pneumoniae (CRKP) infection. Methods Thirty-nine cases whose CRKP isolation and culture were positive and who were confirmed with nosocomial infection in 2nd affiliated hospital medical school of Zhcjiang University between July 2006 and July 2008 were retrospectively investigated. Results There were 22 (56.4%) sputum specimens among CRKP samples. The average age of the patients was 64.0 years old and the average length of staying in hospital was 80.8 days. There wcre 36 patients who had been in intensive care unit (ICU) within 2 weeks and 26 were conscious disturbance,38 received urethral catheterization, 34 inserted with central venous catheter, 32 received tracheal intubation and 30 assisted with mechanical ventilation. There were 27 (69. 2 % ) patients who were co-infected with other bacteria and 8 were co-infccted with fungi. The mortality was 46. 2% in patients with CRKP infection. Before CRKP-positive culture, 27 (69.2%)experienced ＞4 kinds of antibiotics with the majority of β-lactams/β-lactamase inhibitors and carbapenems.Conclusions CRKP infection frequently occurrs in elder and patients who prolonged stay in hospital,especially patients in ICU. Invasive procedures could increase the infection opportunities.

Objective To study the distribution and drug resistance of clinical Providencia stuartii isolates and provide the basis data for clinical therapy.Methods A data analysis for the specimen source,the distribution of departments with infection and the antibiotic susceptibility results to 76 isolates was conducted in retrospectively. Results Among 76 strains were mainly from sputum (71.1%),wound secretions (10.5%) and blood (6.6%);the proportion of these strains from ICU was 40.8%,from respiratory department was 9.2%and from general surgery was 7.9%;The bacteria's drug resistance was more serious,multi drug resistant (MDR) strains accounted for 65.8%,pan drug resistant ( PDR) strains accounted for 26.3%,the mortality of patients with PDR strains infection was 45.0%,which was higher than 5.8%of no PDR strains infection.A low resistance rate of antibiotics were imipenem,fluoro-quinolones andamikacin,et al,and the rate of imipenem resistant was lowest(31.5%).Conclusion The multidrug resistance phenomenon of Providencia stuartii is serious, the first choice for the treatment is imipenem, the second choice was fluoroquinolones or amino glycopeptides antibiotics,the hospital infection caused by the bacterium infection in monitoring should be strengthened.

Objective To observe the changes of bone mineral density (BMD) of boys and girls from 12 to14 years old in the urban areas and the suburbs of Beijing.Methods 613 middle school students were divided into the city group and the suburbs group, and whole body scanning was performed with dual energy X-ray bone densitometer.Results The values of BMD of the boys and girls in the urban areas were significantly higher than that in the suburbs (P

19.6),normal group(BMI=14.2～19.6)and underheight group(BMI

Objective To observe the changes of bone mineral density (BMD) in young boys and girls from 6-19 years old in Beijing area. Methods 1 139 healthy young boys and girls undergoing whole body scanning with dual energy X-ray bone densitometer were divided into different groups according to sex and age. Results There were no significant difference in body height, weight, BMD and bone mineral contents (BMC) between boys and girls from 6 to 10 years old. The annual growth rates of body height, BMD, and BMC were the fastest in girls from 6 to 14 and boys from 6 to 16 years old, respectively. Thereafter, the annual growth rates of body height, BMD, and BMC didn't significantly increase in boys and girls. There were two fast-growth periods in BMD growth stage, being at 11 and 14 years old in girls, and at 12 and 15 years old in boys. The total body BMD was significantly correlated with the height in girls under 12 years (P

0.05). Tanreqing intervention treatment had better influence on the pneumodynamics and arterial blood gas than the therapentic influence on that in the control group, the functional improvement rate of lung and extra-pulmonary organs of study group obviously outstripped the rate of control group, and the incidence of VILI and VAP was also obviously decreased in the former group. The mortality in ICU for multiple organ failure (MOF) of Tanreqing intervention group was 16%, which was obviously lower than that (48%) of the control group (P

Objective In order to investigate the comlex course of electricity and mechanism of erosive gastritis(EG) and its relative factors,and to extract gastric motility feature indexes.Methods 30 volunteers of erosive gastritis were selected.The signal processing device was designed by Chongqing University of Posts and Telecommunications.By the means of spectrum analysis technic,the signals could be classified according to the dominant power and dominant frequency.Some indexes such as frequency of EGG and IGM,signal power spectrum and dynamic spectrum,the rates of rhythm and power for the normal EGG and IGM and so on could also be calculated.Results The power ratio in 2~4 cpm was 59.2?4.4,the frequency ratio was 70.4?25.5,the frequency instability coefficient was 0.182?0.059,and the power instability coefficient was 1.576?0.481.The parameters changed signifcantly between health adult and patient(P0.05).Conclusion The results of the experiments show that the method based on the synchronous measurement of EGG and IGM can provide a non-invasive way to investigate and evaluate erosive gastritis corresponding to gastrointestinal physiology and pathology conditions.

ObjectiveTo compare the therapeutic effect, adverse effects and safety of leflunomide (LEF)and cyclophosphamide(CTX) on lupus nephritis(LN). Methods43 patients with reactive LN were randomly divided into two groups. Based on hormone application,22 cases in LEF group were given LEF orally and 21 cases in CTX group were given CTX intravenous drip discontinuously. They were followed up for six months. The related indexes and possible concomitant adverse effects were detected. ResultsThe total effective rate in LEF group was 81.8％ and that in CTX group was 85.7％. The tolerance in LEF group was better and 3 cases had adverse effects. 13 cases in CTX group had adverse effects. ConclusionLEF had the same efficacy as CTX in the LN therapy, but the tolerance is better and the side effects are minor than CTX.

Objective To explore the risk factors of pulmonary artery hypertension (PAH) and the its relationship with T cell subsets to provide a foundation for the prevention and treatment of PAH.Methods 154 maintained hemodialysis (MHD) patients in our dialysis center were recruited according to the criterion and divided into two groups subsequently:PAH group (pulmonary artery systolic pressure,PASP ＞ 35 mmHg) and non-PAH group (PASP≤35 mmHg).The related clinical,biochemical and ultrasonic cardiogram data were collected and peripheral blood was acquired to detect the expressions of the surface antigen CD3,CD4,CD8 and CD69 with flow cytometry.Logistic regression analysis was used to find out the relationship between PAH and T cell subsets.Results There was no significant difference between 56 cases of PAH and 98 cases of non-PAH as regards gender,age,mean systolic and diastolic pressure,dialysis durations,morbidities of hypertension and diabetes,smoking rate,and left ventricular diameter.Compared with the non-PAH group,the PAH group demonstrated a lower percent of CD8 T cells and CD8 CD69 T cells,but a much higher left atrial diameter (LAD),Interventricular septum thickness,left ventricular posterior wall thickness,and NT-proBNP.The percentage of T cells,CD4 T cells and CD4 CD69 T cells showed no difference between the two groups.Multivariate analysis confirmed that PAH was negatively independently associated with the percentage of CD8 T cells and CD8CD69 T cells.Conclusions The decreased percentage of CD8 T cells and CD8CD69 T cells in the peripheral blood is a risk factor of PAH in maintained hemodialysis patients,and CD8 T cells may play an important role in the genesis of PAH.

To develop a specific, rapid and convenient method based on molecular motor biosensor to detect food-borne rotavirus. A specific probe was encompassed the conservative region of rotavirus's VP7 segment, and a molecular motor detect device was constructed by connecting probes to F0F1-ATPase molecular motor through biotin-streptavidin system. This biosensor's sensitivity was 0.005 ng/mL for rotavirus RNA. Extracted virus RNA was conjugated with the biosensor separately, at the same time ATP was synthesized. By comparing fluorescence intensity, we can detect rotavirus RNA in samples. This method possessed specificity for rotavirus, without any cross-reaction with Hepatitis A virus and noroviris, and it could be accomplished within 1 h. We detected 15 samples using this method and the results were compared with RT-PCR results. This method is sensitive and specific for rotavirus, and it can be used to detect food-borne rotavirus.
Biosensing Techniques ; methods ; DNA, Viral ; analysis ; genetics ; Food Microbiology ; methods ; Rotavirus ; genetics ; isolation & purification ; Sensitivity and Specificity