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Objective@#To identify the lifestyle pattern of adolescents in Guangzhou and to provide a scientific basis for targeted and individualized interventions for adolescents with different lifestyle pattern.@*Methods@#A survey was conducted by questionnaire among 12 540 students from 27 middle schools in the urban area of Guangzhou using a convenient sampling method. The latent class model (LCM) was used to identify lifestyle patterns of adolescents, and further analyses were conducted to compare differences in dietary habits and willingness to exercise among the different classes.@*Results@#Three lifestyle patterns were identified based on the latent class model: "high sweet snacks/excessive screen time, sleep and exercise deficiency group", 3 797 people, accounting for 30.3%; "low nutrition diet/severe sleep and exercise deficiency group", 2 745 people, accounting for 21.9%; "general diet/sleep and exercise deficiency group", 5 998 people, accounting for 47.8%. Adolescents of different classes had different perceptions of their eating habits and different degrees of willingness to participate in physical exercise, these differences were statistically significant(χ 2=671.54, Z=153.16, P<0.05).@*Conclusion@#The results of the latent class model showed that the three classes of adolescents had their own unique characteristics. It is necessary to inform them of their needs, provide guidance and implement targeted interventions according to the unique characteristics of the different lifestyle patterns in empirical work.
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@#To investigate the current status of milk and dairy product intake of primary and middle school students in Guangzhou and to explore the influencing factors, to provide the basis for promoting the consumption of milk and dairy products for students.@*Methods@#Questionnaire survey was conducted among 7 948 students selected from 3 primary schools and 3 middle schools in Guangzhou. The contents included general information, average amount of the intake of milk and dairy products (including pure milk, yoghurt, milk powder, cheese and other dairy products). Using χ2 test and multivariate Logistic regression to analyze the influencing factors of students’ milk and dairy product intake.@*Results@#About 76.12% of all participants reported milk and dairy products intake<7 times/week, 78.88% reported milk and dairy products intake<300 g/d and the median of milk and dairy products was 178.57 g/d. In the multiple Logistic regression model, girls and high school students were more likely to consume milk and dairy products insufficiently, with the OR of 1.42 (95%CI=1.26-1.60), 1.86 (95%CI=1.51-2.28) respectively. The students with father’s education level being college degree or above (OR= 0.75, 95%CI=0.59-0.94), mother’s education level being high school or above (high school:OR=0.75, 95%CI=0.61-0.93, college degree or above:OR=0.58, 95%CI=0.46-0.72) and annual household income ≥200 000 (OR=0.77,95%CI=0.64-0.92) were more likely to consume sufficient milk and dairy products.@*Conclusion@#Consumption of milk and dairy products among primary and middle school students in Guangzhou was high but not meet the recommended amount,should be strengthened. Health and nutritional education for students and their parents,especially girls and senior students,should be strengthened to promote the milk and dairy products consumption.
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Objective To explore the risk factors ,prevention and treatment of the occurrence of perirenal hematoma after flexible lithotripsy. Methods We retrospectively analyzed the clinical data of 18 patients with symptomatic perirenal hematoma from 1259 who had undergone ureteral flexible lithotripsy in our hospital during the period of April 2007 to April 2016. Of the 18 patients,7 were complicated with diabetes mellitus,11 had urinary tract infection;15 were female,and 3 were male. Results Perirenal hematoma was confirmed by B ultrasound and CT,which situated on the Posterolateral side of the kidney in 8 patients,and on the lower pole and abdominal side in 10. Hematoma depth was 2.6-15.3 cm(average was 5.2 cm). The hematoma?related symptoms gradually disappeared in 11 patients 7 to 14 days after they received conservative treatment. 5 recovered gradually 15 days after undergoing hematoma puncture and drainage ,and 2 recovered 36 days after receiving open surgery for removal of hematoma. Conclusions Female,diabetes,urinary tract infection,bigger stone size,prolonged surgical duration,and infected stones were the risk factors for perinephric hematoma related to ureteroscopic lithotripsy. Full preoperative preparation ,effective anti?infection ,intraoperative improvement of calculus?breaking skills and use of large caliber semirigid through sheath,low pressure perfusion,shorter surgical duration,and staging surgery are effective ways to reduce the occurrence of perirenal hematoma.
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Objective To analyze the serotypes and antimicrobial susceptibility profile of Group B Streptococcus (GBS) in perinatal pregnant women.Methods The vaginal and rectal specimens were collected from pregnant women at 35 to 37 weeks of pregnancy for culture and identification.The serotypes were analyzed using agglutination assay.Antimicrobial susceptibility testing was conducted by using Kirby-Bauer method,and interpreted according to 2009 CLSI breakpoints.The data were analyzed via WHONET 5.6 software.Results The prevalence of GBS was 10.4％ (264/2 533) in the 2 533 perinatal pregnant women.Serotype Ⅲ,Ⅰa and Ⅰb was identified in 54.9％ (84/153),17.6％ (27/153) and 13.1％ (20/153) of the GBS,respectively.All the GBS isolates were susceptible to penicillin,cefiriaxone and vancomycin.But 32.9％,68.1％ and 62.1％ of the isolates were resistant to levofloxacin,erythromycin and clindamycin,respectively.The antibiotic resistance rate of serotype Ⅲ isolates to the above three antibiotics was significantly higher than the other serotypes.Conclusions GBS may colonize both vagina and rectum of pregnant women.Vaginal and rectal secretions should be sampled simultaneously for better screening GBS.GBS serotype Ⅲ was the predominant serotype.Penicillin can be used as the first-choice treatment for GBS infections in pregnant women and newborns.GBS-positive pregnant women should be given the intervention treatment immediately to ensure the health of perinatal infants.
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Objective To compare the efficiency and safety of double-channel flexible ureteroscopy and electronic flexible ureteroscopy.Methods From April 2007 to 2016 July, clinical data of 836 cases flexible ureteroscopic holmium laser lithotripsy were collected. All the patients were randomly divided into electronic lfexible ureteroscopy group (n = 427) and double-channel lfexible ureteroscopy group (n = 409), the operation time, success rate of surgery, complications, residual stone rate of the two groups were compared.Results The success rate of surgery was 92.5% and 83.6% of the two groups respectively, the difference was significant (P 0.05); the average operation time was (81.1 ± 7.9) min and (95.3 ± 7.6) min respectively, the difference was significant (P 0.05).Conclusion Both double-channel lfexible ureteroscopy and electronic lfexible ureteroscopy are effective and safe therapeutic modalities. Electronic flexible ureteroscopy is better than double-channel lfexible ureteroscopy in success rate of surgery because of its high deifnition and lfexible operation.
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To adapt to the system reformation of medical laboratory science from five academic years to four academic years and to meet the new professional technology-oriented requirements, the medical laboratory science institute of Guangdong Medical College has carried out a comprehensive reform of curriculum system. This paper has analyzed the current problems in the school medical ex-amination and explored the curriculum system reform from three respects such as adjusting curriculum by restructuring and integrating programs, implementing modular teaching to build its characteristics and strengthening practice teaching.And it has also explored the full assessment mode by optimizing the traditional one-stop assessment.
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Objective To evaluate the efficacy and safety of minimally invasive percutaneous nephrolithotomy combined with negative pressure system in one-stage treatment of calculus pyonephrosis.Methods Eighty-three cases of calculus pyonephrosis,including 15 upper ureteral calculus cases,9 renal pelvis calculus cases,28 multiple calculus cases and 31 staghorn calculus cases,were retrospectively analysed.The diameter of the stone was from 1.2 to 6.3 cm.All the patients were punctured under X-ray or ultrasound guidance and established an access of 20 F.A 12 F nephroscope,combined with negative pressure system,was inserted to the collecting system to suck off the liquor pus.The stone was fragmented by pneumatic lithotripsy or holmium laser lithotripsy at one-stage.Negative pressure system was used to reduce the intrapelvic pressure during the operation.Results All the patients were treated successfully.The average operative time was 34 ± 19 min.The upper ureteral calculus and renal pelvis calculus cases were all stonefree at one-stage treatment.Of the other 59 cases,33 cases were stone-free and 26 cases need a secondlook.The total stone free rate was 68.7％(57/83)at one-stage and 91.6％(76/83)at second-look.Only 7 patients had fever after operation and no patient had sepsis or shock.Conclusion Combined with negative pressure system,minimally invasive percutaueous nephrolithotomy via a 20 F tract is safe and effective for one-stage treatment of calculus pyonephrosis.
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Objective To explore the extensively drug resistant mechanism and clinical treatment strategy of Klebsiella pneu-moniae .Methods The isolate was identified by Vitek2 Compact System.Antimicrobial susceptibility testing was conducted by Kirby-Bauer method.KPC-2 carbapenemase was detected by modified Hodge test.The gene encoding KPC-2 carbapenemase was amplified by polymerase chain reaction (PCR)and then sequenced.Results The strain was resistant to all antibiotics used in routine antimicrobial susceptibility testing except amikacin.Modified Hodge test showed positive result.KPC-2 gene was detected by PCR.The sequence was consistent with that of 11844849 in GenBank.After treatment for one month,no exten-sively drug resistant K.pneumoniae strain was detected from the patient.Conclusions It is necessary to strengthen the monito-ring and improve the awareness of extensively drug resistant K.pneumoniae for better control of such infections.
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In order to adapt to the modern medical development,the selective course on bacterial drug-resistance was opened for master postgraduates.This paper analyzed the curricular contents,the teaching methods and the questionnaire-done by the master postgraduates.The students could know well the mechanism of bacterial drug-resistance and the basic principle on apphcation of antimicrobial agents.
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To investigate the distribution of the genes of two major metallo-beta-lactamases (MBL; i.e., IMP and VIM) and class 1 integrons (intI) in the clinical imipenem-resistant Pseudomonas aeruginosa, a total of 65 isolates, from a university hospital in Sichuan between December 2004 and April 2005 were screened for MBL genes by PCR using primers specific for bla ( IMP-1 ), bla ( VIM ) and bla ( VIM-2 ) genes. The MBL-positive isolates were further assessed for class 1 integrons by PCR using specific primers. The nucleotide sequences of several PCR products were also determined. The results revealed that the bla ( VIM ) gene was found in 81.5% (53/65) of all isolates, bla ( VIM-2 ) gene was found in only 1 isolate and the intI gene was observed in 45.3% (24/53) of bla ( VIM )-positive isolates. One isolate carried simultaneously both bla ( IMP-1 ) and intI genes, and to the best of our knowledge this is the first report of such isolate in southwest China. These observations highlight that the genes for VIM beta-lactamase and class 1 integrons were predominantly present among the imipenem-resistant P. aeruginosa tested, confirming the current widespread threat of imipenem-resistant, integron-borne P. aeruginosa.
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Anti-Bacterial Agents/pharmacology , China , DNA Primers/chemistry , Drug Resistance, Bacterial , Gene Expression Regulation, Bacterial , Imipenem/pharmacology , Integrons , Microbial Sensitivity Tests , Models, Genetic , Pseudomonas Infections/genetics , Pseudomonas Infections/microbiology , Pseudomonas aeruginosa/metabolism , Sequence Analysis, DNA , beta-Lactamases/metabolismABSTRACT
A total of 50 clinical imipenem-resistant isolates of Pseudomonas aeruginosa and Acinetobacter baumannii were subjected to the ceftazidime-2- mercaptoethanol -double-disk synergy test and to the PCR assays with primers specific for bla(IMP-1). After the process of sequencing the positive one to identify the results, PCR analysis was conducted with primers specific for class 1 integrons. For synergy test, 28 isolates gave positive results, among which were 27 Pseudomonas aeruginosa and Acinetobacter baumannii. Only one Pseudomonas aeruginosa was found to carry bla(IMP-1), and bla(Int1) at the same time. This is the first ascertainment of IMP-1 producing Pseudomonas aeruginosa isolate carrying bla(IntI1) in West China, which is of significance to the research on the clinical spread of these drug-resisitant genes.
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Acinetobacter baumannii , Genetics , Anti-Bacterial Agents , Pharmacology , Ceftazidime , Pharmacology , Drug Resistance, Multiple, Bacterial , Genetics , Fermentation , Imipenem , Pharmacology , Mercaptoethanol , Pharmacology , Microbial Sensitivity Tests , Pseudomonas aeruginosa , Genetics , beta-Lactamases , GeneticsABSTRACT
This is a study on the biodegradable polymers as gene controlled-released coatings for gene transfer. The PELA (poly (Dl-lactic acid)-co-poly (ethylene glycol), and PLGAE (poly (lactic acid)-co-poly (ethylene glycol)-co-poly (glycolic acid) random copolymer) were synthesized and prepared as the coatings of plasmid pCH110 in the transfection. All kinds of factors affecting the loading efficiency, cytotoxicity, transfection efficiency and the course of the degradation and release in vitro were discussed. The average diameters of microspheres of PELA and PLGAE were 1-3 microm and 0.72 microm respectively. The loading efficiency levels of them were 62% and 70% respectively. The transfection efficiency levels of two kinds of pCH110 delivery system for COS-1 cells were higher and two of them had few cytotoxicity. After transfection, the X-gal assay was performed and reported positive for 96 h. The biodegradable polymeric materials as gene carriers possess their potential superiority.
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Biocompatible Materials , DNA , Chemistry , Drug Carriers , Chemistry , Toxicity , Gene Transfer Techniques , Lactates , Chemistry , Toxicity , Lactic Acid , Chemistry , Toxicity , Polyethylene Glycols , Chemistry , Toxicity , Polyglycolic Acid , Chemistry , Toxicity , Polymers , Chemistry , Toxicity , TransfectionABSTRACT
New strategies are needed for prevention of Pseudomonas aeruginosa (P. aeruginosa) infections, a widespread disease caused by P. aeruginosa with strong drug resistance. The immunoprotective capacity of the receptor of autoinducers protein LasR/RhlR was examined in the BALB/c mice. At first, specialized expression plasmids were developed to facilitate expression of LasR/RhlR proteins in Escherichia coli (E. coli). Then, biofilms were grown from clinical isolated P. aeruginosa PA0305 to investigate the relative contributions of cell signaling for biofilm formation. Morphological characters of biofilm were quantified using Image-Pro Plus software. Fluorescence analysis demonstrated that cell signal molecule LasR/RhlR significantly (P ＜ 0.05) influenced development of P. aeruginosa biofilm. Active immunization of mice with LasR/RhlR was found to provide significant protection against homologous challenge with P. aeruginosa in mice lungs. In 10 days after lungs inoculation, the bacterial clearance rate of the immunized mice was clearly higher than that of non-immunized groups on the basis of microbiological and histological assays. The protective effects of immunization with LasR and Rh1R together were the same as the result of LasR or Rh1R immunized mice alone. These data indicate that the manner ofLasR, Rh1R or both is an important determinant of immunoprotection in mice lungs infection.
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OBJECTIVE:To study the effects of Xinghuang tablets on tumor growth and immunologic function in S 180 sarcoma-bearing mice.METHODS:The model of mice with S 180 sarcoma were given Xinhuang tablets intragastrically to ob?serve the effects on the ratio of tumor to body,the inhibition rate of tumor,the indices of the spleen and thymus,and the rate of micronuclei in PCE in bone marrow of the mice.RESULTS:The body weight of the mice with S 180 sarcoma was decreased;the growth of the tumor was inhibited;the weight of spleen was increased;the number of leucocyte of peripheral blood was raised(P