Objective To understand the prevalence of disinfectant-resistant gene qacA/B in the clinical strains of methicillin-resistant Staphylococcus aureus (MRSA) .Methods A total of 123 clinical consecutive MRSA strains were collected for PCR assay to detect qacA/B gene and mecA gene .Results The qacA/B gene was identified in 19 (15 .4% ) of the 123 MRSA strains . The mecA gene was positive in 89 .4% (110/123) of the MRSA strains .Conclusions The disinfectant-resistant gene qacA/B is prevalent in the hospital-acquired MRSA strains .Monitoring measures should be strengthened for appropriate selection of disinfectants in clinical practice .

Objective To investigate the diagnostic value of the enhancement patterns for characterizing various focal hepatic lesions (FHL). Methods Forty-seven patients (50 lesions) were included into the study. The morphologic features and the dynamic enhancement patterns of FHL were observed in the early arterial phase, late arterial phase and portal venous phase.The degree of FHL enhancement was analyzed by calculating the contrast-to-noise ratio. Results 70% of the HCCs presented “fast-filling and rapid-washout” feature; 67% of the cholangiocarcinomas showed slight enhancement in arterial phase, and 33.3% had delayed enhancement on portal venous phase; All hemangiomas presented peripheral nodular enhancement in arterial phase, which then demonstrating centropedal “push-on” enhancement in portal venous phase; Hepatic abscesses mainly presented a slightly enhanced rim around the lesion with fibrous septa inside and an edematous zone outside. Conclusion The enhancement pattern and the dynamic evolution of FHL enhancement had a great diagnostic value for different FHL by using MRI 3D-VIBE sequence.

Objective To establish a method for the isolation and preparation of forsythoside B and acteoside reference substances from Lamiophlomis rotata.Methods Forsythoside B and acteoside in L.rotata were isolated and purified by macroporous resin,Sephadex column,and preparative HPLC.Results Analysis with HPLC showed the content of the prepared acteoside and forsythoside B reached to 98.93 and 99.91%,respectively.Conclusion This method is effective for the high purity of prepared acteoside and forsythoside B.It can be used as reference substances for the qualitative and quantitative analyses of Chinese herbal medicine.

Objective To investigate the proliferation inhibition and apoptosis induction effect of thalidomide(Thal) and its joint effect with 5-Fu on MGC-803 cell line. Methods The morphological changes of MGC-803 cells with AO/EB stain were observed under fluorescence microscope. The proliferation inhibition effeet was evaluated with MTT. The apoptosis induction effect was determined by FAM. Results The results of MTr array were as below: the difference was significant between Thai groups of 25 mg/L or above concentration and the control group (P＜0.05), 5-Fu of all testing concentrations showed significant difference compared with the control gToup(P＜0.01). For combined groups with the same concentration of 25 mg/L 5-Fu,combined groups showed distinct difference from the corresponding 5-Fu group (P＜0.01), but two combined groups showed no distinct difference with each other (P＞0.05). For combined groups with the same concentration of 5-Fu 12.5 mg/L, 5-Fu plus 50 mg/L or 100 mg/L Thai showed no distinct difference from 5-Fu group of 25 mg/L(P＞0.05). With FAM study, all test groups showed significant difference compared with the control group (P＜0.01). There was also significant difference between two test groups arbitrarily (P＜0.01).Conclusion Both Thai and 5-Fu could inhibit the proliferation and induce the apoptosis of MGC-803 cells.The effect is reinforced with the combination significantly. Combination with Thai could decrease the concentration of 5-Fu but have the similar effect.

Objective To investigate the prevalence of hepatitis B virus infection and its epidemiological characteristics among planned pregnancy couples in Chongqing.Methods A total of 10 712 planned pregnancy couples were selected by proportionally stratified multi-stage random sampling method during April and December 2013.A questionnaire survey was performed, and enzyme linked immunosorbent assay ( ELISA) was used for hepatitis B virus surface antigen ( HBsAg ) and hepatitis B surface antibody ( anti-HBs) detection.SAS 8.2 was adopted for data process.Chi-square test and test for linear trend were performed to compare the rates of HBsAg and anti-HBs among different populations.Results Among 21 424 individuals, 1 718 (8.02%) were HBsAg positive.The positive rate of HBsAg in husbands was 9.48%, which was significantly higher than that in wives (6.55%,χ2 =63.39, P<0.01).Anti-HBs was positive in 8 967 (41.85%) individuals, and the positive rates in husbands and wives were 42.39% and 41.32%respectively (χ2 =2.54, P>0.05).The positive rates of HBsAg and anti-HBs increased with the age (χ2 =2.98 and 9.83,P<0.01).The highest HBsAg positive rate and lowest anti-HBs positive rate were observed among individuals of southeast of Chongqing.The positive rates of HBsAg and anti-HBs varied in people with different occupation.The highest HBsAg and anti-HBs positive rates were found in private business owners (9.18%) and public employees (49.69%) , respectively;and the lowest HBsAg and anti-HBs positive rates were found in public employees (6.79%) and farmers (39.08%), respectively.As the education level increased, HBsAg positive rate was decreasing (χ2 =-3.33, P<0.01), and anti-HBs positive rate was increasing (χ2 =9.73, P<0.01).Conclusions The prevalence of HBV infection is still high among planned pregnancy couples in Chongqing in the year of 2013.Vaccination and the related treatments should be enforced in population with high risk of HIV infection.

Objective To investigate new cases of endemic cretinism in high-risk areas of Inner Mongolia, the prevalence of endemic goiter, the implementation of comprehensive measures, and to provide scientific basis for developing control strategies against iodine deficiency disorders (IDD). Methods In 2007 and 2008, a search for new cretin cases was conducted among children under the age of 10 in 11 historical serious epidemic cretinism prevalent areas of Songshan district, Keshiketeng qi, Kalaqin qi, Zhalaite qi, Zhuozi county,Liangcheng county, Qingshuihe county, Helin county, Dongsheng district, Zhungeer qi and Yinjinhuoluo qi. Three to 5 towns were selected in each qi(county, district) and 3 to 5 village primary schools were selected in each town.One hundred and twenty to 200 children aged 8 to 10 were selected in each school to inspect thyroid by B ultrasound and palpation and to test intelligence and urinary iodine. Two villages were selected in each town and 30 households were selected to determine urinary iodine of housewives and salt iodine. Results A total of 56 cases of suspected cases of endemic cretinism were found from the 11 counties but no case was confirmed. The goiter rate of children aged 8 to 10 was 5.2% (309/5922) by palpation and 4.3% (252/5922) by B-ultrasound. The median urinary iodine of children aged 8 to 10 was 241.5 μg/L, and urinary iodine was 100 to 300 μg/L, accounted 65.9%(3901/5920). Median urinary iodine of the 9 Qis(counties, districts) was in the range of 200 and 300μg/L.Higher than 5% of the 11 Qis(counties, districts) with urinary iodine lower than 50 μg/L was zero. Higher than 10% of the 11 Qis(counties, districts) with urinary iodine lower than 100 μg/L was 1. The median urinary iodine of housewives was 225.6 μg/L, and lower than 50 μg/L accounted for 2.2%(35/1597). Higher than 10% of the 11 Qis(counties, districts) with urinary iodine lower than 100 μg/L was 4. A total of 2109 households were investigated and 97.45%(2055/2109) of them ate iodized salt and 2.55%(54/2109) of them ate non-iodized salt. Conclusions In the 11 investigated counties, goiter rate of children has decreased to less than 10%, and no new cretin was found. It could be concluded that the fulfillment of prevention and control of IDD is effective. The iodine nutrition of children and women of childbearing age is in an adequate level. The coverage rate of iodized salt has maintained at a higher level, the sales network is sound, the salt price is reasonable and salt is easy to get and the children's intelligence is protected effectively. But, the health education about IDD is still weak, need to be reinforced.

Objective To explore the effects of the pre-pregnant body mass index(BMI) and the pregnancy growth on the mater-nal and neonatal outcomes .Methods 250 pregnant women with the built file ,regular antenatal inspection and hospital delivery in our hospital during 2011 were selected and divided into the emaciation group ,the appropriate group and the obesity group according to the pre-pregnant BMI .The occurrence rates of cesarean section ,fetal macrosomia ,low birth weight ,postpartum hemorrhage ,ges-tational diabetes ,gestational hypertension disease ,fetal distress ,neonatal asphyxia and puerperal infection were compared among the various groups .In addition ,according to the different growth amplitudes of pregnancy BMI ,the pregnant women were re-divided in-to 3 groups(weight gain insufficient group ,weight gain appropriate group and weight gain overmuch group ) and the different ma-ternal and neonatal outcomes were compared .Results The occurrence rates of cesarean section ,macrosomia ,gestational diabetes and gestational hypertension disease in the obesity group were significantly higher than those in the emaciation group and the appro-priate group(P<0 .05) ,while the occurrence rate of the low birth weight in the emaciation group was significantly higher than that of the appropriate group and the obesity group(P<0 .05);the occurrence rates of cesarean section ,macrosomia ,gestational diabetes and gestational hypertension disease in the weight gain overmuch group were significantly higher than those in the weight gain in-sufficient group and the weight gain appropriate group(P<0 .05) ,while the occurrence rate of low birth weight in the weight gain insufficient group was significantly higher than that of the weight gain appropriate group and the weight gain overmuch group (P<0 .05) .Conclusion The maternal and neonatal outcomes in the pregnant women with pre-pregnant BMI exceeding the standard and pregnant BMI overmuch growth are very worrying .The growth of pre-pregnant BMI and pregnant BMI is one of the important indi-cators for monitoring the maternal and neonatal complications .

To study the related substances in nicergoline, electrospray positive ionization high resolution TOF/MS was used for the determination of the accurate mass and elemental composition of the related substances. Triple quadrupoles tandem MS/MS was employed for the determination of the fragmentations of the parent ions. 16 related substances were detected and identified to be eight synthetic by-products and eight degradation products, by using impurity references matching, product mass spectra fragmentations elucidation, and verified further according to synthetic processes and stress testing results. The results obtained are valuable for nicergoline manufacturing process control and quality assurance.
Chromatography, High Pressure Liquid ; Nicergoline ; chemical synthesis ; chemistry ; Quality Control ; Tandem Mass Spectrometry

Objective To explore the influence of injury severity on transplantation of embryonic neural stem cells (NSCs) after traumatic brain injury (TBI).Methods The NSCs were isolated from the hippocampus of fetal rats aged at from 12-14 days.The cells were cultured and proliferated in the serum-free medium and identified in vitro.The animals received transplants in the bilateral hippocampal areas at day 3 following mild or moderate TBI separately.Conventional histology,TUNEL and immunohistology were examined to detect BrdU,NSE,GFAP,GalC,NGF and BDNF at day 14 post-implantation.Results BrdU-labeled positive cells in the bilateral hippocampus in the mild TBI group were more than those in the moderate TBI group at day 14 post-implantation.Significant differentiation of the astrocytes recognized as GFAP positive cells in the bilateral hippocampus was found at day 14 post-implantation.The expression of NGF and BDNF proteins was increased following TBI,the most evident in the mild TBI group.Conclusion The influence of injury severity on transplantation may be associated with the change of the microenvironment after TBI.