Objective:To prepare a colloid gold kit for the qualitative detection of the dopes met-amphetamine and morphine by one-step chromatography immunoassay in human samples based on the principle of the highly specific immunochemical reactions between the antigens and their antibodies which were used for the analysis of specific compounds in human urine samples at ideal cut-off concentrations.Methods:The monoclonal antibodies(McAb) of either mouse anti-morphine or mouse met-amphetamine were prepared by hybridomas and the limiting dilution respectively. The titers of McAb were tested by ELISA.The kit was assembled and the specificity,sensitivity,and stability were investigated.In addition,these characters were compared with those of issued Pan Probe single test strip.Results:①The titer of the first McAb against morphine was 1∶3.2?103, as for another, 1∶1.6?103. ②The colloid gold kit was found with following cut-off for the dope concentrations,morphine at 300 ng/ml and met-amphetamine at 1 000 ng/ml. ③The colloid gold kit showed fine specificity without cross-reaction with routine medicines for cold treatment or with the solf-drinks of cokocola or with tobacco for the individuals who did not take the dopes the 7 days.④The colloid gold kit was even more sensitive than the issued strip,because urine sample of the junkies were still positive 4-5 days post-intake.Conclusion:The colloid gold kit for indentifying the drug-users is a rapid,specific, sensitive immunoassay suitable for the simultaneous, qualitative detection of drug abuse.

Clinical practice is an important period to train student's skills in pediatric surgical learning,but it is confronted with difficult condition under the new doctor-patient relationship.How to resolve these difficulties is the key to carry on teaching successfully.Aaccording to the students' interests and the knowledge structure characteristics,teachers should cultivate their professionalism,train their communication skills,extend their thinking ability with appropriate use of teaching aid to increase the teaching interests and develop self-learning ability.

BACKGROUND: Umbilical cord blood mesenchymal stem cells (UCB-MSCs) can differentiate into various types of cells under certain condisions, and easily proliferate in vitro. However, UCB-MSCs have long establishment time and low frequency.OBJECTIVE: To in vitro isolate and culture UCB-MSCs, and induce its differentiation into osteoblasts.DESIGN, TIM E AND SETTING: The in vitro cytological study was performed at the Laboratory of the Medical College of Qingdao University from June 2008 to January 2009.MATERIALS: UCB was obtained from term normal delivery women at the Department of Gynaecology and Obstetrics, Qingdao Municipal Hospital.METHODS: Human UCB-MSCs were isolated and cultured in vitro by Percoll density gradient. When reached 90% confluency,UCB-MSCs were digested by trypsin for subculture. At the third passage, UCB-MSCs at 1×106 were incubated. When reached 50% 60% cenfluency, UCB-MSCs were treated with DMEM supplemented with 0.1 μmol/L dexamathasone, 10 mmol/Lβ-sodium glycerophosphate and 50 μmol/L vitamin C. UCB-MSCs in the control group were incubated in low glucose DMEM.MAIN OUTCOME MEASURES: Growth and proliferation of MSCs were observed under the inverted microscope. Cell surface marker expression and cell growth curve were measured by flow cytometry. Cell ultrastructure was observed under the transmission electron microscope. Differentiation of UCB-MSCs into osteoblasts was determined by Won Kossa staining and alkaline phosphatase staining.RESULTS: Primary cultured UCB-MSCs had similar morphology to bone marrow mesenchymal stem cells. After passage, cell morphology was even, presenting spindle shape. UCB-MSCs at passage 3 highly expressed CD29, CD44, CD13, but did not express CD34. Growth latency was 2-3 days. Cells entered logarithm proliferation phase at days 3-4, and platform phase 1 month later. Nuclei presented round or irregular, with clear nuclear membrane, 1-2 nucleoli, rough chromatin, abundant organelles and microvilli. UCB-MSCs at passage 3 were gradually confluent following 3 days of osteogenic induction, with the presence of pavement-stone shape. 14 days later, calcified nodules by Von Kossa staining, and cells were positive for alkaline phosphatase staining. In the control group, no calcified nodules were found, and cells were negative for alkaline phosphatase staining.CONCLUSION: UCB-MSCs can be successfully isolated by Percoil density gradient, and induced to differentiate into osteoblasts in vitro.

Education reform and innovative education are the strong requirements of the times and social development.We developed immunological paper free examination system based on the optimized question bank,characteristics of immunological examination and information technology.This system can randomly develop electronic examination paper and can integrate the processes of exam registration,examination paper development,online examination,paper inspection,scores generation and printing into one system,which can save human resources,enhance the accuracy and fairness of the examination,making it conform to international standards.

Objective To analyze the clinical features of severe pneumonia complicated with congenital heart disease (CHD) . Methods The clinical data of 270 children patients with severe pneumonia complicated with CHD (CHD group) were collected to analyze the relative medical history ,etiology ,bacterial drug resistance and clinical outcomes .Moreover ,636 age-matched children pa-tients with pure severe pneumonia were selected as the control group .Results In the CHD group ,250 cases were infants and 35 ca-ses suffered from repeated pneumonia .Compared with the control group ,the CHD group was earlier in onset and more prone to re-peated pneumonia .Among 270 cases ,totally 220 cases were checked out the pathogens ,but no statistically significant difference in the detection rates of pathogens between the CHD group and the control group was found (P>0 .05);179 cases were infected by bacteria ,in which 126 cases were Gram-negative bacteria ,the positive rate of bacterial infection and the detection rate of Gram-nega-tive bacterial were relatively higher than those in the control group ,the difference was statistically significant (P<0 .05);95 cases were infected by virus ,with respiratory syncytial virus being the most common pathogen ,30 cases were infected by fungi ,with Can-dida albicans being predominant ,the infection rates of virus and fungus had no statistical difference between two groups (P>0 .05);in the drug sensitive test ,the detection rate of extended spectrum beta lactamase (ESBLs)-producing positive bacteria in the CHD group was higher than that in the control group ,the difference was statistically significant (P<0 .05) .Main Gram-negative bacteria Pneumonia klebsiella pneumonia subspecies ,Escherichia coli and haemophilus inf luenzae were highly sensitive to imipenem ,mero-penem ,levofloxacin and ciprofloxacin ;main Gram-positive bacteria Staphylococcus aureus and streptococcus pneumoniae were highly sensitive to vancomycin and gentamicin .Especially ,pneumonia klebsiella pneumonia subspecies ,Escherichia coli and haemophilus influenzaewere100% resistanttopenicillin.TheaveragelengthofhospitalstayintheCHDgroupwas (20.9±12.5)d,207cases developed the respiratory failure ,88 cases appeared the heart failure and 205 cases were effective in treatment ;compared with the control group ,the CHD group had a longer length of hospital stay ,higher occurrence rate of heart and respiratory failure and lower treatment effective rate (P<0 .05) .Conclusion Because of the earlier onset ,more prone to repeated pneumonia ,more sensitive to bacterial infection ,esp .Gram-negative bacteria ,more ESBLs production ,longer hospital stay and more prone to complications ,com-pared with the control group ,children with severe pneumonia complicated with CHD require active treatment .

This paper discusses the problems of optimizing teaching of medical microbiol-ogy on the aspects of optimizing teaching matters and teaching means,of integrating teaching with learning,and training teachers,etc. to improve the teaching quality in microbiology through some innovational measures.

Oncomelania hupensis is the only intermediate host of Schistosoma japonicum. The elimination of Oncomelania snails is the key technique step for schistosomiasis control. This paper summarizes the progress of the techniques of snail control，including the methods of ecology engineering，biology，molluscicides and the study on novel molluscicides，and reviews their features. In addition，this paper explores the appropriate approach to control the snails.

Some unhealthy life habits, such as long-term smoking, heavy drinking, sexual overstrain and frequent stay-up could induce the Yin deficiency symptoms of zygomatic red and dysphoria. Stems of Dendrobii officinalis flos (DOF) showed the efficacy of nourishing Yin. In this study, the hyperthyroidism Yin deficiency model was set up to study the yin nourishing effect and action mechanism of DOF, in order to provide the pharmacological basis for developing DOF resources and decreasing resource wastes. ICR mice were divided into five groups: the normal control group, the model control group, the positive control group and DOF extract groups (6.4 g · kg(-1)). Except for the normal group, the other groups were administrated with thyroxine for 30 d to set up the hyperthyroidism yin deficiency model. At the same time, the other groups were administrated with the corresponding drugs for 30 d. After administration for 4 weeks, the signs (facial temperature, pain domain, heart rate and autonomic activity) in mice were measured, and the facial and ear micro-circulation blood flow were detected by laser Doppler technology. After the last administration, all mice were fasted for 12 hours, blood were collected from their orbits, and serum were separated to detect AST, ALT, TG and TP by the automatic biochemistry analyzer and test T3, T4 and TSH levels by ELISA. (1) Compared with the normal control group, the model control group showed significant increases in facial and ear micro-circulation blood flow, facial temperature and heart rate (P < 0.05, P < 0.01), serum AST, ALT (P < 0.01), T3 level (P < 0.05), TSH level (P < 0.05) and notable deceases in pain domain (P < 0.01), TG level (P < 0.01). (2) Compared with the model control group, extracts from DOF (6 g · kg(-1)) could notably reduce facial and ear micro-circulation blood flow, facial temperature and heart rate (P < 0.05, P < 0.01) and AST (P < 0.05) and enhance pain domain (P < 0.01) and TG (P < 0.01). Extracts from DOF (4 g · kg(-1)) could remarkably reduce AST and ALT levels (P < 0.01, 0.05). Extracts from DOF (6 g · kg(-1) 4 g · kg(-1)) could significantly reduce T3 and increase serum TSH level (P < 0.05). DOF could improve Yin deficiency symptoms of zygomatic red and dysphoria in mice as well as liver function injury caused by overactive thyroid axis. According to its action mechanism, DOF may show yin nourishing and hepatic protective effects by impacting thyroxin substance metabolism, improving micro-circulation and reducing heart rate.
Animals ; Dendrobium ; chemistry ; Drugs, Chinese Herbal ; administration & dosage ; Female ; Flowers ; chemistry ; Humans ; Hyperthyroidism ; drug therapy ; metabolism ; Male ; Mice ; Mice, Inbred ICR ; Phytotherapy ; Thyroxine ; metabolism ; Yin Deficiency ; drug therapy ; metabolism

AIM:To explore the molecular mechanism of panaxadiol saponin(PDS)by observing Toll like receptor(TLR)2 and TLR9 mRNA expression induced by lipopolysaccharide(LPS).METHODS:Rats were divided into LPS,LPS+PDSL,LPS+PDSM and control group,respectively.Nitric oxide synthase(NOS)activity,nitric oxide(NO)content,LPO content,SOD activity and TLR2 and TLR9 mRNA expression were assayed 4 h after intravenous injection of LPS.RESULTS:NOS activity,NO content,LPO content of LPS+PDSL group and LPS+PDSM group were significantly lower than those in LPS group.TLR2 mRNA expression in the liver tissue of LPS+PDSL group and LPS+PDSM group was decreased compared with LPS group.CONCLUSION:PDS has a protective effect on liver tissues by triggering the down-regulation of TLR2 expression,reducing NOS activity,and NO content.

This report presented the endemic status of schistosomiasis in the People’s Republic of China at a national level in 2015,and analyzed the data collected from the national schistosomiasis prevention and control system and 457 national schis?tosomiasis surveillance sites. Among the 12 provinces(municipality,autonomous region)endemic for schistosomiasis japonica in P. R. China,5 provinces(municipality,autonomous region),i.e.,Shanghai,Zhejiang,Fujian,Guangdong and Guangxi, had achieved transmission interruption,and 7 provinces of Sichuan,Yunnan,Jiangsu,Hubei,Anhui,Jiangxi and Hunan had achieved transmission control by the end of 2015. There were 453 endemic counties(city,district)covering 252 million peo?ple,specifically including 29 980 endemic villages of 68.61 million people at risk of infection. Among the 453 endemic counties (city,district),75.72%(343/453)and 24.28%(110/453)reached the criteria of transmission interruption and transmission control,respectively. By the end of 2015,it was estimated of 77 194 cases of schistosomiasis,which were decreased by 33.23%compared with 115 614 cases in 2014. No acute schistosomiasis cases were reported in 2015. There were 30 843 advanced schis?tosomiasis cases documented in 2015. A total of 8 736 036 individuals received schistosomiasis examinations and 3 606 individu?als were parasitologically diagnosed,which were decreased by 56.40%compared with 8 270 cases in 2014. An Oncomelania hu?pensis snail survey was performed in 19 965 endemic villages and the snails were found in 5 609 villages,accounting for 28.09%of total villages,with 31 newly detected villages with snails. The snail survey covered an area of 593 572.66 hm2 and snails were found in an area of 173 462.50 hm2,including a newly detected area of 666.04 hm2. No infected snails were found in 2015. A to?tal of 879 373 bovines were raised in the schistosomiasis endemic regions. Of them,526 062 bovines received stool examina?tions,resulting in 315 infected bovines. There were 170 438 schistosomiasis cases receiving drug treatment in 2015,with 2 449 696 individuals undergoing expanded chemotherapy. There were 318 bovines with schistosomiasis receiving drug treatment,with 483 213 bovines undergoing expanded chemotherapy. A total of 144 305.52 hm2 area was subject to snail control by using mollus?cicides,with an actual molluscicide?treated area of 69 221.57 hm2,and 4 572.06 hm2 snail habitats were treated by environmen?tal modification. Based on the data from the 457 national schistosomiasis surveillance sites,the mean Schistosoma japonicum in?fection rate was 0.05% and 0.04% in humans and bovines,respectively. No infected snails were found in all the surveillance sites. The results demonstrate a decline in the endemicity of schistosomiasis in P. R. China and the country reached the criteria of transmission control at the national level. However,the endemic situation of schistosomiasis is unstable in some regions with newly?reached transmission control,and further control and effective surveillance should be strengthened to consolidate the achievements and reduce the endemic situation of schistosomiasis in P. R. China.