Objective To establish a multiplex polymerase chain reaction (PCR) assay for simultaneous identification of Shigella spp., Salmonella spp. and Vibrio cholerae. Methods Based on the gene sequences of invasion plasmid antigen H (ipaH) in Shigella spp., invasion plasmid antigen B(ipaB)in Salmonella spp. and enterotoxin extracellular secretion protein (EPSM) in V. cholerae, three pairs of primer were designed. Genomic DNA was extracted by the boiling method and multiplex PCR was performed with premix Taq in an ABI 2720 thermal cycle. The PCR-amplified products were then analyzed by using agarose gel electrophoresis. Results Under the optimized conditions, the assay yielded a 606-bp product from Shigella spp., a 314-bp product from Salmonella spp., and a 482-bp product from V. cholerae, respectively. When the DNA extraction of multiple target organisms was included in the same reaction, two or three corresponding amplicons in different size were observed. Conclusions A rapid, specific and sensitive multiplex PCR system for simultaneous detection of Shigella spp., Salmonella spp. and V. cholerae has been established. The results suggest that the simultaneous amplification of several genes by multiplex PCR may provide an efficient and rapid diagnostic method for severe diarrhea.

Objective To investigate efficacy of citalopram on pathological crying after cerebral infarction.Methods 106 patients with pathological crying after cerebral infarction were randomly divided into two groups,treatment group(54 cases) and control group(52 cases).Control group received conventional treatment of cerebrovascular disease.Treatment group taken citalopraml0-20mg orally one time per day for three months based on conventional treatment.The total response rate,effectual time,and Hasegawa Dementia Scale (HDS) scores were compared between two groups after treatment.Results There were significant differences in total response rates (94.4％ and 38.5％,respectively),effectual time(1.98 ± 1.24 and 78 ± 17.95,respectively) and HDS(8.43 ±2.21 and 6.24 ±2.02,respectively) between treatment group and control group (P ＜ 0.01).Conclusion The study suggests that it is effective to treat pathological crying with citalopram and its effect is quick.Citalopram can not only control patient’s pathological crying,but also improve cognitive function.

Objective:To raise awareness of acute myeloid leukemia (AML) combined with lymphoblastic lymphoma (LBL) in children.Methods:The clinical characteristics, diagnostic methods, treatment plans and prognosis of a child with AML combined with LBL who was admitted to the First Affiliated Hospital of Zhengzhou University in April 2016 were retrospectively analyzed, and the relevant literature was reviewed.Results:The patient was an 11-year-old boy with fever, abnormal hemogram and cervical lymph node enlargement as clinical manifestations. A biopsy of the cervical lymph node was performed and the patient was diagnosed as T-lymphoblastic lymphoma (T-LBL). After the bone marrow morphology, immunology, cytogenetics and molecular biology (MICM) classification examination, the diagnosis was AML. The patient met the diagnostic criteria of two diseases at the same time, and thus he was confirmed as AML combined with T-LBL. AML chemotherapy regimens were given, and the patient achieved complete remission and disease-free survived.Conclusions:AML with LBL is extremely rare in children. The diagnosis mainly depends on MICM classification examination of bone marrow and pathological examination of lymph nodes. There is currently no standard treatment scheme, and the prognosis is extremely poor. AML chemotherapy followed by bridging hematopoietic stem cell transplantation is the best treatment option for these patients.

Vascular endothelium plays an important role in regulating vascular homeostasis. Over the past years, it has become clear that endothelial dysfunction is a key event of pathophysiological changes in the initiation and progression of injuries induced by extreme environmental factors. The present review summarizes current understanding of vascular endothelial dysfunction induced by hypoxia, cold and heat, and provides the information for prevention and treatment of environmental exposure injuries.
Endothelium, Vascular ; physiopathology ; Environment ; Humans ; Hypoxia ; physiopathology ; Temperature ; Vascular System Injuries

Objective: To investigate the safety and efficacy of CARTO3 fast anatomical mapping during radiofrequency ablation in patients with paroxysmal atrial ifbrillation (PAF). Methods: A total of 120 PAF patients treated in our hospital from 2013-01 to 2015-07 were enrolled. All patients received CARTO3 system for mapping and they were randomly divided into 2 groups: Control group, the patients had selective pulmonary vein angiography, followed by conventional point by point method to reconstruct left atrial model for guiding the ablation of PFA and Treatment group, the patients had selective pulmonary vein angiography followed by fast anatomical mapping to build left atrial model for guiding the ablation of PFA; the rest operational steps such as trans-septal and circumferential pulmonary vein ablation were the same.n=60 in each group. The times of operation, X-ray exposure and the rates of success, complication occurrence were compared between 2 groups. Results: All patients were successfully completed radiofrequency ablation for PAF. Compared with Control group, Treatment group had increased modeling time (8.5 ± 3.6) min vs (5.2 ± 2.3) min, while decreased pulmonary vein ostium determing time (12.0 ± 5.6) min vs (25.0 ± 8.4) min, circumferential pulmonary vein ablation time (95.0 ± 22.0) min vs (115.0 ± 25.0) min and X-ray exposure time (15.0 ± 6.3) min vs (24.0 ±5.5) min, allP<0.05. The rates of success and complication occurrence were similar between 2 groups, P>0.05. Conclusion: CARTO3 fast anatomical mapping is safe and effective for guiding radiofrequency ablation in PAF patients, it may decrease the X-ray exposure time and operation time which were important for treating the relevant patients.

Objective To evaluate the feasibility of catheter ablation of Para-Hisian Atrial Tachycardia guide by CARTO. Method Catheter ablation guided by CARTO was performed after activation map in three patients with Para-Hisian Atrial Tachycardia. Result Successful ablation was got at right atrial in two patients and at non-coronary in one patient. Conclusion Catheter ablation guided by CARTO is safe and efficient for Para-Hisian Atrial Tachycardia.

In order to solve the adhesion and the softening problems of traditional Chinese medicine extract during spray drying, a new method of adding dehumidified air into spray drying process was proposed, and the storage stability conditions of extract powder could be predicted. Kouyanqing extract was taken as model drug to investigate on the wet air (RH = 70%) and dry air conditions of spray drying. Under the dry air condition, the influence of the spray drying result with different air compression ratio and the spray-dried powder properties (extract powder recovery rate, adhesion percentage, water content, angle of repose, compression ratio, particle size and distribution) with 100, 110, 120, 130, 140 °C inlet temperature were studied. The hygroscopic investigation and Tg value with different moisture content of ideal powder were determined. The water activity-equilibrium moisture content (aw-EMC) and the equilibrium moisture content-Tg (EMC-Tg) relationships were fitted by GAB equation and Gordon-Taylor model respectively, and the state diagram of kouyanqing powder was obtained to guide the rational storage conditions. The study found that in the condition of dry air, the extract powder water content decreased with the increase of air compression ratio and the spray drying effect with air compression ratio of 100% was the best performance; in the condition of wet air, the extract powder with high water content and low yield, and the value were 4.26% and 16.73 °C, while, in the dry air condition the values were 2.43% and 24.86 °C with the same other instru- ment parameters. From the analysis of kouyanqing powder state diagram, in order to keep the stability, the critical water content of 3.42% and the critical water content of 0.188. As the water decreased Tg value of extract powder is the major problem of causing adhesion and softening during spray drying, it is meaningful to aid dehumidified air during the process.
Drug Stability ; Drugs, Chinese Herbal ; chemistry ; Humidity ; Medicine, Chinese Traditional ; Plant Extracts ; chemistry ; Powders ; Temperature

AlM: To introduce a new color pediatric visual acuity chart and its clinical application.
METHODS:The color pediatric visual acuity chart was designed based on principle of visual angle. The optotype on the color chart had graphics. The progression rate of optotype size between 2 lines was 10 10 and 1. 2589. A regular geometric progression of optotype sizes and distribution was employed to arrange 8 lines with 11 optotype on the color chart. The testing distance was 3m. The visual acuity score could be recorded as logarithm of the minimum angle of resolution notation or decimal notation. The reliability of naked distant measurements with this new chart was tested in one eye of 100 children (4 ~ 6 years old) taking the Chinese national standard logarithm visual acuity chart standard.
RESULTS: The color pediatric visual acuity chart and logarithmic chart controls, visual acuity test results that in the two groups had no significant difference (t=1. 2671, P> 0. 05 ). Two sets of vision data existed positive correlation (r= 0. 924, P<0. 01). Cooperation rate was 100%, the recognition rate was more than 90%.
CONCLUSlON:Children are easier to accept used new color pediatric visual acuity chart to inspect vision. New chart is reliability and apply to children's vision screening.

Objective To analyse the effect of dual antiplatelet drugs on fibulin-5, vWF and P-selection in serum of patients with acute cerebral infarction.Methods Diagnosed 60 patients with acute cerebral infarction in our hospital and collected. All patients were randomly divided into experimental group and control group, 30 cases in each group.The control group was treated with conventional treatment and aspirin, and the experimental group was treated with clopidogrel on the basis of control group.After treatment, the serum levels of Fibulin-5, vWF, P-selection and adverse reactions were detected in all patients.ResuIts After treatment, compared with control group, the serum Fibulin-5 level was significantly lower in experimental group ( P<0.05 );the serum vWF level in experimental group was significantly lower ( P<0.05 );the serum P-selectin level in experimental group was significantly lower (P<0.05);there was no significant difference in the incidence of adverse reactions between two groups. ConcIusion Dual antiplatelet drugs can reduce serum vWF, P-selectin and fibulin-5 in serum of patients with acute cerebral infarction, adverse reactions do not significantly increase, have guiding significance to clinical application.

A method was developed for the determination of tetrodotoxin in marine organisms by high perfor-mance liquid chromatography-mass spectrometry with immunoaffinity column. The samples were extracted with 1% acetic acid methanol solution and diluted with phosphate buffer at pH 7-8. After cleaned up by immuno-affinity column, the samples were analyzed by LC-MS/MS and quantitatively determined by external standard method. The chromatographic separation was performed on an ACQUITY UPLC BEH Amide column with gradient elution by using acetonitrile and 5 mol/L ammonium acetate solution containing 0. 1% formic acid as mobile phase. Detection was carried out by electrospray positive ionization mass spectrometry in the multiple reaction monitoring mode. Linear ranges of TTX was in the range of 0. 3 -20. 0 μg/L with correlation coeffi-cient more than 0. 997. The quantification limit of the method was 0. 3 μg/kg. The recoveries of standard addition for tetrodotoxin were 88. 7%-102. 3%, and the relative standard deviation was 2. 0%-6. 4%. The method could be used to identify and quantify tetrodotoxin in marine organisms with satisfactory reproducibility and sensitivity.