Contamination of foodborne pathogens is the main cause of related diseases. Escherichia coli O157:H7 (E.coli O157:H7), as a representative of pathogenic E.coli, is one of the most severe and commonly reported E.coli in the world, but there is still no effective clinical treatment against the infection. Antibiotics show effective in the early infection of E.coli O157:H7. However, their extensive use has led to drug-resistant bacteria and genes in recent years, which becomes a great threat to public health. This article reviews the research progress of E.coli O157:H7 from the prevalence of antibiotic-resistant bacteria, the resistance mechanism, and the prevention and control methods, in order to provide a reference for its prevention, early clinical treatment and related research.

To evaluate the clinical application of defecography in irritable bowel syndrome, 14 cases of diarrhoea predominant IBS, 12 cases of constipation predominant IBS and 10 cases of mixed patterns underwent defecography. Thirteen cases showed abnormal IBS (36 11%). The abnormal X ray features of anorectal angle and pelvic floor descent included rectocele, rectal mucosal prolapse, splanchnoptosis, perineum descent and spastic pelvic floor syndrome. Defecography is valuable in the diagnosis and treatment of irritable bowel syndrome

In view of the contradictory phenomenon between yingfen dominating the interior when suffering exogenous epidemic febrile disease and ying disease dominating the exterior in cold pathogenic diseases,the authors revealed the misunderstanding of yingfen dominating the interior in epidemic febrile disease by a systematical analysis on the headstream of the theory,the connotation for diagnosis and treatment and logical relation. Based on the requirement of the theory guiding the clinical effectively,at the same time,the authors put forward a new opinion on classification of diagnosis and treatment on wei,qi,ying,blood system by the theory of the cold integrating the warm,which was a courageous exploration for the purpose of seeking unity of thinking on syndrome differentiation and treatment of external infection diseases.

In view of the contradictory phenomenon between yingfen dominating the interior when suffering exogenous epidemic febrile disease and ying disease dominating the exterior in cold pathogenic diseases,attemping to get the logical demonstration that cold pathogenic diseases and exogenous epidemic febrile diseases can be integrated by yingfen diseases,the authors made a systematic classification and comparison on basis of the collection of related diagnosis and treatment in respective yingfen diseases of cold pathogenic diseases and exogenous epidemic febrile disease. It was of vital importance to connecting cold pathogenic diseases with exogenous epidemic febrile diseases in classification of diagnosis and treatment in wei,qi,ying,blood system.

Objective To investigate rectal visceral perception、 anorectal manometry and colonic transit time in functional constipation and constipation-predominant irritable bowel syndrome (IBS) and to assess their variety of manometric abnormalities. Methods The cases with functional constipation and constipation-predominant IBS were studied in a colonic transit test by radiopaque markers. Rectal visceral perception thresholds, rectal compliance and anorectal manometry were examined in patients with functional constipation or constipation-predominant IBS by electric barastat. Results The colonic transit time in both groups of constipation patients was abnormal. A lot of radiopaque markers remined in right colon when patients with constipation-predominant IBS were examined, as the patients with functional constipation in anorectum. The anorectal resting pressure, squeeze pressure and relaxation pressure were similar in both groups. Rectal compliance and defecation thresholds were much higher than normal, and the rectal visceral perception of functional constipation was also abnormal. Conclusion The motility abnormalities between functional constipation and constipation-predominant IBS occure in the different colonic segments. The results suggested that colonic transit test and anorectal manometry might provide a method in differentiatial diagnosis.

Objective To investigate the therapeutic effects of pinaverium bromide on irritable bowel syndrome (IBS), and to study its effect on rectal visceral perception and anorectal manometry. Methods Eighty four patients with IBS received pinaverium bromide 50 mg t.i.d for 2 weeks. The score of symptoms was assessed before, after one week and 2 weeks of threatment. Rectal visceral perception thresholds, rectal compliance and anorectal manometry were measured before and after administration of pinaverium bromide. Results Pinaverium bromide 150 mg/d significantly improved the score of abdominal pain, abdominal distension and mucus stool(2.13?0.36 vs 1.28?0.35,2.49?0.73 vs 1.35?0.17,1.03?0.27 vs 0.43?0.12, P

Objective To investigate morphological and synthetic alteration of enterochromaffin(EC) cells of intestinal mucosa in patients with irritable bowel syndrome(IBS). Methods Fifty cases of IBS were classified into diarrhea predominant and constipation predominant in accordance with RomeⅡ criteria. Colon biopsy tissues were stained through Envision immunohistochemistry. Morphological changes of EC cells in intestinal mucosa were also studied by electron microscopy. Results EC cells were seen in the crypt of intestinal mucosa. The shapes and the number of EC cells in diarrhea predominant IBS and constipation predominant IBS increased remarkably, compared with those in controls (15.90 ?5.09, 14.73?2.73 vs. 7.27?2.50). It was shown that EC cells synthesized excessive 5 hydroxytryptamine (5 HT) by immunohistochemistry. The function of EC cells in IBS was active under electron microscopy. Conclusions Active enteral EC cells noticed in IBS indicate that excessive 5 HT may play an important role in the pathogenesis of IBS.

Objective: To construct a hsa-microRNA-224(miR-224) lentiviral expression vector and to establish pancreatic mucinous cystadenocarcinoma MCC1 cell line with stable miR-224 over-expression. Methods: Pri-miR-224 gene fragment was designed and amplified by quantitative real-time polymerase chain reaction (qRT-PCR), and then loaded into GV369 lentiviral vectors (GV369-miR224) by gene recombination technology. GV369-miR-224 lentivrial expression vectors were then identified by PCR and DNA sequencing. The GV369-miR-224 vector fluid was then used to infect pancreatic mucinous cystadenocarcinoma MCC1 cell line to establish the MCC1 cell line stably over-expressing miR-224. The transfection efficiency of GV369-NC and GV369-miR-224 was observed under fluorescence microscopy; and the expression levels of miR-224 in MCC1, GV369-miR-224-MCC1 and GV369-NC-MCC1 cell lines were detected by RT-PCR. Results: The GV369-miR-224 lentiviral vectors were successfully constructed. GV369-miR-224-MCC1 and GV369-NC-MCC1 cells all emit green fluorescence under the fluorescence microscope. The expression level of miR-224 in GV369miR-224-MCC1 cell group was significantly higher than that in negative control GV369-miR-224-MCC1 group and blank control MCC1 cell group (23.45±1.94， 1.46±0.1 and 2.11±0.38, P<0.01), however, there was no significant difference between the two control groups (P>0.05). Conclusion: A pancreatic mucinous cystadenocarcinoma MCC1 cell line with stable miR-224 over-expression was successfully established, and this will provide a new cell model for exploring the function and pathogenesis of miR-224 in pancreatic mucinous cystadenocarcinoma.