Objective To understand the endemic situation of schistosomiasis among 80 national surveillance sites for schistosomiasis in 2006,so as to provide scientific evidence for making out schistosomiasis prevention and control measures. Methods According to the national surveillance protocol, the endemic situation of schistosomiasis in residents and livestock, and the status of Oncomelania snails and other factors were investigated in the 80 national surveillance sites for schistosomiasis, and all the data were collected and analysed. Results Among the 80 national surveillance sites,the average positive rate of residents with sera examination was 13.60% and the average positive rate with stool examination was 1.59%.The average positive rate of floating population with sera examination was 5.79%. There were 143 advanced patients among the national surveillance sites, and 12 acute patients were reported in 2006, but no breaking-out epidemic reported. The proportion of domestic animals stable breeding were about 4.74% of 5 365 examined animals in 2006, and the others were not.The infection rate of domestic animals was 5.93% that declined by 34.49% compared with that in 2005 and especially for the infection rate of cattle and sheep. A total of 7 429.63 hm2 of areas were surveyed. The areas of snail habitats, infected snail habitats and the new snail habitats were 4 994.01,621.75 hm2 and 21.75 hm2,respectively. The density of living snails and infection rate of snails were 0.544 8/0.1 m2 and 0.37%, which increased compared with infection rate of 0.26% in 2005. Conclusion The endemic situation of residents, cattle and snail habitats declined in 2006 compared with those in 2005 in the national surveillance sites.

Objective To analyze comprehensively the investigation data of the national schistosomiasis surveillance sites from 2005 to 2007, in order to provide the evidence for mastering the endemic situation and pattern of schistosomiasis. Methods Eighty surveillance sites were selected, and the investigation data about schistosomiasis in residents and domestic animals and the status of Oncomelania snails in these sites were collected and analysed. Results From 2005 to 2007, the total infection rate in residents decreased by 54.90% (average decreased by 18.30% each year). The sites where the infection rate in residents was higher than 5% decreased year by year. In 2007, there was no site where the infection rate in residents was higher than 5% in all the 80 surveillance sites. All the infection rates in different age groups decreased for three years in succession, and the peak appeared at 30-50 age group in 2005, but moved to 50-60 age group in 2007. The infection rate in domestic animals decreased by 69.22%, and the infection rate in cattle and buffaloes remarkably decreased. For the three years, the areas with snails reduced by 8.84%, and the areas with infected snails reduced by 53.23%. The average densities of living snails and infected snails decreased year by year, but the infection rate of snails fluctuated during the three years. Conclusion The endemic situation of schistosomiasis in residents and cattle, and the status of snails, in general, remarkably decreased from 2005 to 2007.

Objective To survey and understand the endemic situation of schistosomiasis in China in 2007,so as to provide the evidence for decision-making of schistosomiasis control.Methods The data of investigation on schistosomiasis in residents,domestic animals,Oncomelania snails and other relative factors were collected and analysed in the 80 national surveillance sites,2007. Results In 2007,the total infection rate of the residents was 0.92%,which decreased by 42.31% compared with that in 2006. There was no site where the resident infection rate was more than 5% among all the 80 surveillance sites. The peak of the resident infection rate with different age groups appeared at the 50-60 age group. The cattle and buffalo were still the main infection targets. The infection rate of domestic animals was remarkable decreased. The density of living snails was 0.430 0/0.1 m2. The percentage of frames with living snails was 0.06%. The density of infected snails was 0.000 7/0.1 m2,and the snail infection rate was 0.16%. All of them were decreased compared with those of 2006. Conclusion The schistosomiasis endemic in the residents,cattle and snails was remarkable decresed in the national surveillance sites,2007.

Female ; Genetic Predisposition to Disease ; Hepatitis B ; genetics ; Hepatitis B virus ; Humans ; Polymorphism, Genetic ; Pregnancy ; Pregnancy Complications, Infectious ; virology ; Promoter Regions, Genetic ; genetics ; Tumor Necrosis Factor-alpha ; genetics

Butyric acid can be used to produce cellulose butyrate fiber and ester derivatives,and to be applied in foodstuffs and perfume industries.Recent researches have found that butyric acid is a preferred carbon source for colonic epithelial cells,and can inhibit histone deacetylase,showing great anticancer potentials.With more and more functions of butyric acid being found and applied in bio-related fields,and with consumer's growing preference to bioproducts,biotechnological production of butyric acid will receive more competence than petroleum-based chemical synthesis.Low product concentration and poor selectivity are presently the main restricting factors.Workers have made considerable progress on more cheep carbon sources,optimization of fermentation process,simplifying downstream processing,and genetic engineering of producing strains.Any achievement on these aspects in the future can contribute to put fermentation of butyric acid into industry.

Objective To investigate the efficacy and the mechanism of different dose hepatitis B immunoglohulin(HBIG)on prevention of HBV intrauterine infection and HBV S gene mutation. Methods HBV carrier mothers were randomly divided into three groups.Eighty-one HBsAg carrier pregnant women were divided into HBIG A group.HBIG B group and control group.Each subject in the HBIG A group received 200 U or 400 U(for HBsAg and HBeAg double positive carrier)intra muscularly at 3,2,1 month before delivery.Each subject in the HBIG B group received 200 U intra muscularly at 3,2,1 month before delivery.The subjects in the control group did not receive any treatment.Maternal blood samples were taken before HBIG injection and at delivery.Neonatal blood samples of all newborn infants after birth were taken before immunopropbylaxis.Their sera were ob tained to test HBV markers by enzyme immunoassay(EIA)and HBV DNA by fluorescence quantita- tive polymerase chain reaction(FQ-PCR),then to amplify and sequence HBV S gene region.Results The rate of HBV intrauterine infection in the HBIG group(14.5%)was lower than that in the control group(35.7%)(X~2=4.896,P=0.027).The rate of HBV intrauterine infection of newborns from HBsAg and HBeAg double positive carrier mother in the HBIG A group(37.5%)were lower than control group(100.0%)(X~2=7.273,P=0.007),while the rate was no different in the HBIG B group(71.5%)and the control group(X~2=2.637,P=0.104).Maternal HBsAg titer and HBV DNA level were of no difference among three groups before HBIG injection.Maternal HBsAg titers and HBV DNA levels of the HBIG A group were lower than those of the HBIG B group and the con- trol group at delivery.Among the 26 neonatal serum samples in the HBIG A group,10(38.5%)were positive for anti-HBs,while in the HBIG B group and in the control group,no neonatal serum sam- ples was positive.There was no significant difference of nucleotide and amino acid changes in the S gene between the HBIG group and the control group.Conclusions HBV infection in the uterus may be interrupted by injection HBIG intramuscularly before delivery.More efficacy would be found using variable HBIG dose according to different HBV virema and must be once more again injected just he- fore one week of delivery;anti-HBs transported to the fetus via the placenta and it's may be the im- portant mechanism of HBIG prevention.Asymptomatic HBsAg carrier mother received injections of HBIG before delivery should not influence HBV S gene mutation.Gene mutation of HBV is not the main factor in intrauterine transmission of HBV.

Objective To understand human rhinovirus (HRV) etiology of acute lower respiratory tract infection (ALRTI) in children in Shanghai area and establish a nested reverse transcription- polymerase chain reaction (nested RT-PCR) assay.Methods Three hundred and forty-two naso- pharyngeal secretion (NPS) samples from ALRTI cases who were hospitalized were collected during January 2005—December 2005.Nested RT-PCR techniques were used to detect HRV-specific RNA.The PCR products were sequenced and data of nucleotides were analyzed.The proportion of HRV infection in children with ALRTI,the distribution of gender,age and season,and clinical char- acteristics were also investigated.Results Forty-six (13.5%) of 342 samples were HRV positive detected by nested RT-PCR.The sequences of 15 positive samples shared high homology of 83%- 97% with HRV sequence in GenBank.Within the 15 positive samples,nucleotide homology varied from 64.4% to 98.4%,and the ratio of genetic variation was from 1.6% to 48.3%./00.These 15 ampli- cons attribute to the two branches of HRV cladogram.The sequences of 15 amplieons were highly varied,in which single nucleotide mutation and several nearby nueleotides mutations were found. Ribonucleotide deletion and insertion in the nucleotide sequence was also found.HRV positive sam- ples were detected in 33 boys and 13 girls,respectively.The ratio of infection cases between boys and girls was 2.5:1.Of 46 HRV infected cases,27 (58.7%) were less than 12 months of age and 38 (82.6%) were less than 3 years old.HRV infected ALRTI occured all the year round and peaked from March to May.Of the patients whose NPS samples were HRV positive detected by nested RT-PCR,45 patients were diagnosed with bronchopneumonia and 1 was diagnosed with asthmatic bronchitis.Fever of most patients was moderate.The peripheral blood leukocyte counts in thirty-nine (84.8%) patients were less than 10?10~9/L.Neutrophil percentages in thirty-seven (80.4%) patients were less than 0.50.C-reactive protein of thirty-six (78.3%) patients were less than 8 mg/L. All of these features were the characteristics of viral pneumonia.The complications were not common and conditions of most patients were not severe.All the children were cured.Conclusions This nes- ted RT-PCR technique is highly specific,rapid and convenient for the detection of HRV RNA in NPS of patients with ALRTI and the genome of HRV viruses is highly variable.The incidence of HRV infection predominates in children in Shanghai area.ALRTI of HRV is short of specificity and condi- tions of most patients are not severe and their prognoses are fine.

The leaves of Rumex dictyocarpus Boiss et Buhse are used for treatment in acute abdomen. From this plant four constituents have been isoiated and identified as emodin、chrysophanol、quercetin、quercitrin by chemical and spectroscopic methods. These constituents were known to possess antibacterial, anti-inflammatory or hemoslatic actions, it seems that the clinie effects are related to the presense of these constituents.

Full-speed development of the primary health care centering on community health service is key to the ongoing health reform in China. Building a new management mechanism for these grass-root health centers is an innovative approach of such a reform as carried out in Zhejiang province.The authors described the present management mechanism in the province, and focused on the specific measures and main outcomes of the nine Group-scale model as used by a district health bureau in Hanzhou since end of 2007. The paper aims at building an ideal model for group-scale management of community health centers, and improving the new city primary health care system centering on community health service.