We investigated the serotype,drug resistance features,molecular types,and homology of Salmonella in diarrhea in Tai'an City,and provided scientific evidences for warning,control and clinical treatment.The 31 Salmonella strains isolated from stool specimens of diarrhea in Tai'an were identified by serotyping.Broth dilution technique was used to test the sensitivity of 31 strains of Salmonella to 16 antibiotics.Pulsed field gel-electrophoresis (PFGE) was used for molecular typing and cluster analysis.Results showed that 31 strains of Salmonella were divided into 10 kinds of serotype.S.enteritidis (11/31) was the predominant serotype.All 31 strains of Salmonella were sensitive to cefoxitin and imipenem.The drug resistance rates of the 31 strains of Salmonella were 77.42 ％ (24/31) to sulfafurazole.The 31 strains of Salmonella were divided into 17 patterns by PFGE,with 100％ similarity for each pattern.All the results suggest that there are more serious problems in multiple drug resistance.The genetic variation of S.enteritidis is relatively conservative.Early warning and control on S.enteritidis are exposed to reinforce.

Objective E cadherin catenin complex mediates cell cell adhesion and plays an important role in maintaining normal architecture and function of epithelial tissues. We evaluated the expression patterns of E cadherin, ? catenin, and ? catenin in gastric carcinoma and determine the potential relationship between E cadherin catenin complex and tumor clinicopathological features as well as patient survival. Methods Immunohistochemical staining of E cadherin, ? catenin, and ? catenin in 148 gastric carcinomas was performed. Results The abnormal expression rates of E cadherin, ? catenin and ? catenin in the tissues of gastric carcinomas were 44.6%, 73.6% and 43.2%, respectively. The total abnormal expression rate of E cadherin complex in 148 cases of gastric carcinoma was 91.9%. Reduced expression of E cadherin, ? catenin and ? catenin were significantly correlated with tumor differentiation status ( P

Objective To investigate the relationships among clinical features, endoscopic characteristics and pathologic epithelial types of Barrett esophagus. Methods Magnification chromoendoscopy ( MCE) was performed in 2506 patients with gastroesophageal reflux disease ( GERD) and 106 patients with Barrett esophagus in our hospital during Feb,2003 -Feb,2004 were analyzed. The clinical features, endoscopic characteristics, pathologic epithelial types and their relationships were analyzed. Results The symptoms of gastro esophageal reflux disease ( GERD) were the main presentation of Barrett esophagus but 27 (25. 5% ) cases without such presentation. Four types of mueosal patterns, dot pattern, ridge or villous pattern and irregular/distorted pattern. were noted within the columnar mucosa using high magnification endos-copy: There were three epithelial types within the columnar lined esophagus: intestinal metaplasia (IM ) , cardiac and fundie types. Three epithelial types were noted in the methylene blue staining areas; ridged/vil-lous pattern and irregular/distorted pattern, all of them were in epithelial types of intestinal metaplasia. Conclusion Magnification chromoendoscopy helps to identify areas with IM, and having important significance in diagnosis and clinical follow up of Barrett esophagus.

Objective Colorectal polyp is a precancerous lesion of colorectal cancer .Aim of the study was to explore the risk fac-tors of colorectal polyp malignant transformation .Methods The related information of 75 084 colonoscopies performed from 2003 to 2012 in Southwest Hospital in Chongqing were collected and the relationship between polyp malignant transformation and the pa-tient age ,sex ,polyp location ,size or histological types was analyzed .Results From 2003 to 2012 ,polyps were diagnosed in 14 806 cases of the total 75 084 patients with a 19 .72% detection rate .There were significant difference of the left-side and right-side pol-yp detection rate in different age groups ,and the frequency of polyps distributed in the whole colorectum increased with the increase of age .The rates of epithelial neoplasia and malignant transformation increased with age .At the same time ,malignant transforma-tion rate was significant higher in polyps located in left-side than that in right-side (P<0 .0167) ,in adenoma than that in inflamma-tory hyperplastic polyp (P<0 .01) .The larger diameter and the more villus ,the higher rate of malignant transformation .Conclusion Patient age ,polyp size ,location and histological type could be considered as the significant predictors of colorectal polyp malignant transformation .It may be useful to treat the polyp with endoscopy in patient with age more than 45 and adenoma whose diameter was not less than 1 cm ,located in left-side for prevention of colorectal cancer .

Objective To evaluate the diagnostic value of endoscopic ultrasonography (EUS), and explore the efficacy of endoscopic treatment in patients with esophageal submucosal tumor. Methods Sixty-eight patients with esophageal submucosal tumor were selected, and the tumor was derived from the muscularis mucosa and submucosa according to the common endoscope and endoscopic ultrasonography detection. Endoscopic mucosal resection (EMR) was applied to remove submucosal tumor with diameter less than 1.0 cm, endoscopic piecemeal mucosal resection (EPMR) or endoscopic submucosal dissection (ESD) was applied to remove submucosal tumor with diameter 1.1 - 1.5 cm, and ESD was applied to remove submucosal tumor bigger than 1.5 cm. Samples were examined by pathology after treatment. Results Tumors in all the patients were completely removed, and the tumor diameter was 0.6-2.3 cm. Forty-one cases were treated with EMR, 9 cases were treated with EPMR and 18 cases were treated with ESD. Four patients had intra-operative bleeding that was stopped by electrocoagulation hemostasis. No perforation occurred in all cases. Postoperative pathology revealed 43 cases had leiomyoma, 23 cases had interstitialoma, and 2 cases had lipoma. Patients were reviewed by gastroscope 3 months after operation. The white scars formed in all patients, and there was no residue or recurrence. Conclusions Different origin layers and property of esophageal submucosal tumor can be diagnosed accurately by EUS, and endoscopic therapy (EMR, EPMR and ESD) is an effective treatment for submucosal tumor from muscularis mucosa and submucosa. Endoscopic therapy is safe and effective. It provides sufficient pathological information.

AIM: To evaluate the dynamic changes of the function and ultrastructure of gastric parietal cells under stress and their relation with acute gastric mucosal lesions. METHODS: Thirty-two male SD rats were randomly divided into four groups, which were control group and 1,2,4 h groups under water restraint stress (WRS). The gastric fluid pH value and gastric mucosal ulcer index(UI) were measured. The ultrastructural changes of parietal cells were observed by transmission electronic microscopy (TEM). RESULTS: The study demonstrated that gastric acid secretion increased and gastric fluid pH value decreased gradually and significantly under WRS compared with control group( P

Objective To establish the methodology of combining BOLD and 1H-MRS for investigating correlation between the deactivation in medial prefrontal cortex (MPFC) and gamma-aminobutyric acid (GABA) concentration by acupuncture at LI4 (Point Hegu),and to optimize the experimental technique and procedure.Methods Twenty healthy adult volunteers were enrolled.During fMRI-BOLD scanning,each subject received acupuncture at right LI4 (Point Hegu).MRS scanning was based on MEGA-PRESS sequence,and ROIs were located at bilateral MPFC.The task BOLD fMRI was block design,including 3 stimulations (30 s) with 2 intervals (2 min).Then MRS scanning was performed before and after BOLD.The quantitative values of the BOLD positive and negative activations (Pm) and GABA concentrations were calculated.Results All 20 subjects completed BOLD fMRI scanning,and met the postprocessing requirements.MRS images of 9 subjects with good image quality were included in analysis.Among all 20 subjects,positive activation (Pm=1.17± 0.16) was observed in 9,while negative activation (Pm =-1.31 ± 0.17) was observed in 11 subjects.The GABA average values before and after the acupuncture were (19.93 ±1.04) nmol/L and (20.04±0.81)nmol/L,respectively,and the average amplitude between post-and pre-acupuncture was (0.11 ± 1.60)nmol/L.Conclusion The success rate of this method for quantitative study of brain function established multimodal-functional (BOLD-fMRI and MRS) was acceptable,and the multimodal brain function changes as well as the quantitative values were observed in the brain region during acupuncture.Combined BOLD and MRS quantitative method is feasible for testing acupuncture response in the brain.