Objective To explore the effect of chitosan on the prevention of postoperative peritoneal adhesion. Methods Forty-five Wistar rats were randomly assigned into group A(control group);group B and group C;2 ml of 1% lactic acid, 32% Dextran-70 or 2% Chitosan-lactic acid (CLA) was admitted on the region of serosal injury of intestine respectively during operation. The adhesive degree was observed and biopsy was taken on the 14th postoperative day. Results There were statistically significant differences among the degrees of adhesions between the three groups (P

To direct at the weak points in traditional teaching,teaching methods have been reformed in human parasitology.This article discusses practice in teaching reform of human parasitology.

OBJECTIVE:To promote rational drug use in rural areas of China.METHODS:Problems existed in practical rural rational drug use were analyzed by consulting the related recent literature on researches of rational drug use.RESULTS&CONCLUSION:The current situation of rational use of drugs in rural areas of China is still far from optimistic even though multi-researches about rational drug use have been launched and some achievements have been made.Strategies and measures concerning rational drug use have to be further explored and generalized;theories about rational drug use must be improved and the practice of rational drug use should be directed.

OBJECTIVE:To investigate the procurability and prices of essential medicines in Hubei Xiaogan rural area.METHODS:According to the standard methodology for the investigation of drug prices recommended by the World Health Organization and European Health Action International organization,a survey on the procurability and prices of essential medicines was conducted in 4 hospitals and 3 drugstores in Hubei Xiaogan rural area.RESULTS:The procurability of essential medicines in both hospitals and drugstores was low.The prices of drugs were lower in drugstores than in hospitals.As compared with the international reference prices,the drug prices in drugstores were lower while those in hospitals were higher.The markup ratio in one hospital was far above 15.0%,while those in the other two hospitals were all within 15.0%.CONCLUSION:The procurability of essential medicines in Hubei Xiaogan rural area remains to be increased,and there is space for the reduction of drug prices.

Objective To determine the genotypes and distribution of MSP2 of Plasmodium falciparum isolates in Yunnan and Hainan provinces, China.Methods The central polymorphic region of MSP2 allele was amplified by the nested PCR for genotyping of P.falciparum. Results The higher degree of polymorphism of MSP2 of P.falciparum was observed in Yunnan and Hainan. Distribution and allele frequencies differed in both provinces, indicating considerable geographical heterogeneity of parasite populations. The mixed infection of different allele type and multiplicity of infection was more frequent in Hainan than in Yunnan.Conclusion There were obvious differences in the distribution and frequencies of MSP2 alleles between Yunnan and Hainan endemic areas. MSP2 is suitable to be used as a marker gene for the genotyping of P.falciparum infection.

Objective To obtain an antigenic gene of adult Trichinella spiralis. Methods cDNA library of the adult Trichinella spiralis was screened using the sera of immunized and infected rabbits. The gene sequence was analyzed by DNAstar software and GenBank database. Results Nine positive clones were identified by immunoscreening. The clone Ts87 was sequenced and a cDNA with 1 172 bp full length was obtained using 5′ RACE technique, encoding 347 amino acids. Some possible antigen epitopes were predicted. Conclusion A novel antigenic gene of Trichinella spiralis was obtained.

Objective To obtain the recombinant protein of an antigen gene Ts88 of Trichinella spiralis and identify the characteristics of the recombinant protein. Methods Ts88 cDNA obtained by immunoscreening the cDNA library of adult T. spiralis was subcloned into the pET 28c(+) expression vector and expressed in E.coli . Mice were immunized with the fusion protein incorporated into Freund’s adjuvant and the immune sera were collected. The titers of the Ts88 immune sera and the antigenicity of the recombinant protein were detected by ELISA and Western blotting. Immuno fluorescence test was performed in order to confirm the distribution of Ts88 protein in the worm. Results The fragment of Ts88 gene was expressed successfully in E.coli and a highly purified fusion protein was obtained. Immunization with the recombinant protein in mice produced high titers of antibodies, which recognized some components of native antigens of soluble proteins from adult worm of T. spiralis. Western blotting analysis showed that Ts88 recombinant antigen was recognized by all the positive sera, such as the sera from infected or immunized rabbits, from infected swine and from patients of trichinosis. Immuno fluorescence test confirmed that Ts88 protein mainly distributed in the cuticle surface of the worm. Conclusion The Ts88 antigen gene from T. spiralis was successfully expressed. The recombinant protein presented antigenicity.

Objective To study the nutritional evaluation and clinical effects of perioperative enteral nutrition (EN) versus parenteral nutrition support (PN) in elderly patients undergoing gastrectomy for gastric carcinoma.The safety,feasibility and superiority were also compared between EN and PN.Methods Totally 50 cases (aged 65 years and over) undergoing gastrectomy for gastric carcinoma in Department of Gastrointestinal Surgery of Beijing Hospital were recruited and divided randomly into two groups of EN and PN (25 cases for each).NRS2002 nutritional assessment scoring system was used to evaluate the patients.The patients in EN group were given Rui Su at 2 d before surgery,then Wei wo,Bai pu li and Rui su were sequentially given from 12 h after the surgery.The patients in PN group were received total parenteral nutrition (TPN) via central venous for 7 days.Results The average absolute lymphocytes[(1.22±0.23) ×109/L and (1.31±0.27) ×109/L vs.(1.02±0.21) × 109/ L and (1.14 ± 0.23 × 10)9/L],pre-albumin[(151.442± 48.15) mg/ L and (167.38± 46.23) mg/ L vs.(115.22 ± 47.34) mg/L and (131.27 ± 43.58) mg/L] and transferring [(1.71±0.33)g /L and (1.83±0.31)g/L vs.(1.50±0.32)g/L and (1.65±0.32)g/L,all P＜0.05] levels after surgery of 3 d and 7 d in EN group were higher than those of PN group (P＜0.05).The CRP levels at 3 d and 7 d after surgery were increased in PN group compared with EN group [(63.71±35.26)mg/L and (41.58 ± 22.55)mg/L vs.(54.26±29.13)mg/L and (18.12 ±14.35)mg/L,P＜0.05].The blood sugar and insulin levels of EN group at 3 d and 7 d after surgery were (5.93±1.12) mmol/L and (5.61± 1.03)mmol/L,(6.72±5.14) U/L and (6.21±2.63) U/L,which were decreased compared to PN group (8.31 ± 2.62) mmol/L and (8.85 ± 2.92) mmol/L,(12.81±7.26) U/L and (15.21±8.24) U/L (P＜0.05).ALT in the PN group was (38.43±18.37) U/L at 7 d after surgery,higher than EN group (23.91± 14.82) U/L(P＜0.05).The perioperative average costs of EN group was (2714.5± 1391.7) yuan,lower than PN group (5041.6± 3007.7) yuan (P＜0.05).For the patients complicated with delayed gastric emptying after surgery,nutrition cost reduction was more evident.There were no significant difference between the two groups of patients in the liver and kidney function changes and postoperative complications.Conclusions It is safe and feasible for elderly gastric cancer patients with perioperative EN sequential therapy in view of its reduced stress response of surgical trauma and insulin resistance,improvement of hyperglycemia,reduction of medical costs compared with PN for elderly gastric cancer patients.

Objective To assess the effects of Danhong injection on the perfusion function of the pancreas in patients with acute pancreatitis (AP). Methods A total of 102 patients with AP were collected, and there were 25 patients with severe acute pancreatitis ( SAP) and 77 patients with mild acute pancreatitis (MAP). They were randomly divided into routine treatment group ( RTG,n =54) and Danhong treatment group (DTG,n =48) , respectively. Another 33 normal individuals were used as controls. Patients in RTG received gastric decompression, acid inhibition, anti-infection and nutritional support. Patients in DTG received Danhong injection 30 ml i. v. b. i. d besides routine treatment. The hemodynamic parameters ( BF, BV, MTT, and PS) of perfusion of the pancreas were measured by 16-slice spiral CT scanner. Results The values of BF of control, MAP, SAP group were time was ( 12.6 ± 2.7) d in DTG, which were significantly shorter than those in routine treatment group [(14.5 ±3.2)d, (18.5 ±5.5)d, P <0.05]. Conclusions The parameters of CT perfusion imaging of the pancreas can be a quantitative criterion to assess the severity of microcirculation dysfunction in patients with AP, and Danhong injection is effective to improve the blood perfusion of the pancreas during the treatment of AP.

AIM: To investigate whether hypercapnia is protective against acute lung injury (ALI) in a rabbit model, and study it's potential mechanisms. METHODS: Twenty-two healthy New Zealand white rabbits were involved in this study, and randomly allocated to control group (group C), normocapnic group (group N) and hypercapnic group (group H). Oleic acid (0 1 mL/kg) was injected intravenously to establish ALI model. Lung mechanics, hemodynamics, blood-gas analysis, the content of malondialdehyde (MDA) and superoxide dismutase (SOD) activity in lung tissue were measured. Apoptosis was analyzed after 3h mechanical ventilation. RESULTS: (1) Peak airway pressure in group H was significantly lower than that in group N (P