Objective To understand the epidemiological characteristics of children with positive IgM of mycoplasma pneumoniae (MP) in Wuhan, and to provide a scientific theoretical basis for the diagnosis, prevention and effective control of mycoplasma pneumoniae infection. Methods Patients with respiratory diseases such as fever, cough and runny nose from January 2014 to December 2018 in the Pediatric Outpatient Department and Inpatient Department of Wuhan University People's Hospital were included in the study. Results From 2014 to 2018, a total of 46,790 samples were collected, and the MP-IgM positive rate was 44.08%. The male MP-IgM positive rate was 39.62%, while the female MP-IgM positive rate was 51.00%. The MP-IgM positive rate in males was lower than that in females (χ²=586.15, P<0.0001). There were significant differences in the positive rate among different age groups, and the infection rate in infants aged 3 months was the lowest (χ²=4195.30, P<0.0001). The MP-IgM positive rate in the first and second seasons of infancy within 1 year of age was higher than those in the third and fourth seasons, and the difference was statistically significant (χ²_{1 days =25.05, χ²3 months=26.59, χ²6 months=26.18, P<0.0001). The MP-IgM positive rate of children aged 1-16 in the second and third seasons was higher than that in the first and fourth seasons, and the difference was statistically significant (χ²1-3 years=17.59, χ²4-6 years=28.92, χ²7-16 years =11.43, P<0.05). Conclusion MP-IgM positive rate was related to age, gender and season.}

Objective: To investigate the diagnostic value of immunoglobulin M (IgM) and immunoglobulin G(IgG) antibodies to 2019 Novel Coronavirus (2019-nCoV) in 2019-nCoV infection. Method: This is a retrospective study. Serum samples were collected from 284 patients including outpatients and inpatients in the Renmin Hospital of Wuhan University from January 20, 2020 to February 17, 2020. Among them 205 cases were 2019-nCoV infected patients, including 186 cases confirmed with nucleic acid test and 19 cases diagnosed by clinical symptoms and CT characteristics according to "the New Coronavirus Pneumonia Control Protocol (5th edition)" . A total of 79 subjects with other diseases but negative to 2019-nCoV infection were recruited as control group. Serum IgM and IgG antibodies to 2019-nCoV were measured with fully automated immunoassay technology for all subjects. Statistical significance between 2019-nCoV antibodies test and 2019-nCoV nucleic acid test was determined using the χ² tests. Result: The sensitivity of serum IgM and IgG antibodies to 2019-nCoV were 70.24%(144/205) and 96.10%(197/205) respectively and the specificity were 96.20%(76/79) and 92.41%(73/79) respectively. The positive and negative predictive values of 2019-nCoV antibodies were 95.63%(197/206) and 91.03% (71/78) respectively, and the positive and negative predictive values of 2019-nCoV nucleic acid test were 100%(186/186) and 80.61%(79/98) respectively. The total coincidence rate of diagnosing 2019-nCoV infection between antibody tests and nucleic acid test for 2019-nCoV were 88.03%(250/284). Conclusion Joint detection of serum IgM and IgG antibodies to 2019-nCoV is an effective screening and diagnostic indicators for 2019-nCoV infection, and an effective complement to the false negative results to nucleic acid test.

Objective:To investigate the diagnostic value of immunoglobulin M (IgM) and immunoglobulin G(IgG) antibodies to 2019 Novel Coronavirus (2019-nCoV) in 2019-nCoV infection.Methods:This is a retrospective study. Serum samples were collected from 284 patients including outpatients and inpatients in the Renmin Hospital of Wuhan University from January 20 to February 17 in 2020. Among them 205 cases were 2019-nCoV infected patients, including 186 cases confirmed with nucleic acid test and 19 cases diagnosed by clinical symptoms and CT characteristics according to "the New Coronavirus Pneumonia Control Protocol (5th edition)" . A total of 79 subjects with other diseases but negative to 2019-nCoV infection were recruited as control group. Serum IgM and IgG antibodies to 2019-nCoV were measured with fully automated immunoassay technology for all subjects. Statistical significance between 2019-nCoV antibodies test and 2019-nCoV nucleic acid test was determined using the χ 2 tests. Results:The sensitivity of serum IgM and IgG antibodies to 2019-nCoV were 70.24%(144/205) and 96.10%(197/205) respectively and the specificity were 96.20%(76/79) and 92.41%(73/79) respectively. The positive and negative predictive values of 2019-nCoV antibodies were 95.63%(197/206) and 91.03% (71/78) respectively, and the positive and negative predictive values of 2019-nCoV nucleic acid test were 100%(186/186) and 80.61%(79/98) respectively. The total coincidence rate of diagnosing 2019-nCoV infection between antibody tests and nucleic acid test for 2019-nCoV were 88.03%(250/284).Conclusion:Joint detection of serum IgM and IgG antibodies to 2019-nCoV is an effective screening and diagnostic indicators for 2019-nCoV infection, and an effective complement to the false negative results to nucleic acid test.

Objective To investigate the expression of Wnt7b, β -catenin, and c-Myc in asthmatic mice and the intervention of the leukotriene receptor antagonist montelukast on airway remodeling. Methods The asthma model was established by ovalbumin (OVA) induction. HE staining was used to observe the pathological changes in lung tissue. Serum OVA-sIgE levels were determined by ELISA. The level of Wnt7b, β -catenin, and c-Myc protein and mRNA in the lung tissue of mice was analyzed by Western blotting and real-time PCR. The basement membrane perimeter (PBM), wall area of bronchial tube (WAt), wall area of bronchial smooth muscle (WAm), and the number of smooth muscle cells were measured using medical image analysis software and standardized based on the PBM. Results The amount of OVA-slgE in the asthma group was significantly higher than in the control and montelukast groups (P ＜ 0. 05). Western blotting and real-time PCR showed that the expression of Wnt7b, β -catenin, and c-Myc in the asthma group was higher than the expression in the control and montelukast groups (P ＜ 0. 05). Image analysis showed that the WAt/PBM and WAm/PBM ratios in the montelukast group were significantly lower than those in the asthma group (P ＜ 0. 05). Conclusion The Wnt/ β -catenin signaling pathway may be an important factor in the pathogenesis of asthma; montelukast may attenuate airway remodeling in asthmatic patients by decreasing the expression of Wnt7b, β -catenin, and c-Myc.

Objective To study formation of ammonion-magnesium phosphate crystals in urine with bacteria growing and provide guidance for cilinical prevention of urinary calculi.Methods Bacterial culturefluid of Escherichia coli,Proteus mirabilis,Pseudomonas aeruginosa,Klevsiella pneumoniae,Enterococcus in urine was examined directly under the ultrahigh sensitive microscpcope system for ammonion-magnesium phosphate crystasl.The number of ammonion-magnesium phosphate crystasl was measured when the 24th and the 48th hour.Results Ammonion-magnesium phosphate crystasl were observed from the culture fluid without ammonion magnesium phosphate crystasl.The rate of male formation was higher than that of female.Ammonion-magnesium phosphate crystals in culture fluid of Proteus mirabilis was the highest,Pseudomonasaeruginosa was the second,the third was Klebsiella pneumoniae,and there was formed 1 case in 2 ml culturefluid of enterococcus,and 2 cases of formation in 5 ml culturefluid of Escherichia coli.The crystals formed were the most unformed feather crystals,followed by cubic and square cylinders,an d the envelope like crystals were the least.Conclusion Bacteria with urease play a significant role in ammonion-magnesium phosphate crystasl formed,Proteus mirabilis is the main pathlogen.

BACKGROUNDGlucosylceramide synthase (GCS), an enzyme responsible for ceramide glycosylation, plays an important role in multidrug resistance (MDR) in some tumors in vitro; however, its expression and clinicopathological significance in non-small cell lung cancer (NSCLC) remains unclear.

METHODSWe evaluated GCS expression in 116 paired tumor and adjacent non-cancerous tissues and 50 frozen tissues from patients with NSCLC using immunohistochemistry and western blotting, and explored the correlation between GCS and NSCLC clinicopathological characteristics and prognosis. We observed the association between GCS and the MDR proteins P-glycoprotein (P-gp) and lung resistance-related protein (LRP) to determine the link between GCS and MDR at the histological level.

RESULTSGCS expression was significantly upregulated in NSCLC tumors compared with non-cancerous tissue. There was high GCS expression in 75/116 tumor specimens (64.7%) and 16/116 non-cancerous specimens (13.8%). High GCS expression was significantly associated with poor differentiation (P = 0.01), lymph node metastasis (P = 0.004), recurrence/distant metastasis (P = 0.006), and chemotherapy resistance (P = 0.025). Multivariate analysis demonstrated that GCS immunopositivity was an independent risk factor for survival (P = 0.018). P-gp was expressed in 80/116 tumors (69.0%) and in 12/116 non-cancerous tissue specimens (10.3%; P = 0.001); LRP was expressed in 85/116 tumors (73.3%) and 19/116 non-cancerous tissue specimens (16.4%; P = 0.001). Importantly, the results demonstrated that increased GCS expression in NSCLC cancer specimens correlated with increased expression of P-gp and LRP, molecules known to stimulate cancer cell MDR (r = 0.612 and 0.503, P = 0.01 and 0.035, respectively).

CONCLUSIONGCS upregulation might contribute to the development of NSCLC and could be a useful prognostic indicator and chemoresistance predictor for NSCLC patients.

ATP Binding Cassette Transporter, Sub-Family B ; genetics ; metabolism ; Adult ; Aged ; Blotting, Western ; Carcinoma, Non-Small-Cell Lung ; enzymology ; pathology ; Drug Resistance, Multiple ; Female ; Glucosyltransferases ; genetics ; metabolism ; Humans ; Immunohistochemistry ; Male ; Middle Aged

Objective To observe the efficacy and toxicity of S -1 monotherapy in elderly patients with advanced non -small lung cancer (NSCLC).Methods Fifty-six patients aged 70 or over with stage IIIb-IV NSCLC were enrolled.S-1 was given orally twice a day according to body surface area on days 1 to 14 for 21-day cycle, the evaluation of efficacy and toxicity were performed on all patients after 2 cycles.Results For all 56 patients, CR 0, PR 15, SD 29 and PD 23 were observed.The objective response rate (ORR) and the disease control rate (DCR) were 26.8% and 78.6%,respectively.The 1-year survival rate was 30.9%, with a medi-an survival of 10.0 months.The myelotoxicity and gastrointestinal toxicity were major side effects .The major toxicity could be tolerated by the patients.Conclusions S-1 monotherapy is an effective chemotherapy for advanced NSCLC in elderly patients with moderate side effects and safety in clinical practice .

Objective To analyse the distribution of pathogenic isolates and their durg resistance from inpatient in department of orthopedics from Jan.2008 to Dec.2012 and promote rational use of antibiotics.Methods All the clinical isolates were analyzed ret-rospectivily.Results of 1044 isolates,Gram-negative bacteria accounted for 54.12% (151/279 ),the most common pathogens of which were Escherichia coli,Enterobacter cloacae,and Pseudomonas aeruginosa.Gram-postive bacteria accounted for 41.58%(116/279),Staphylococcus aureus were the most common type.Fungi isolates accounted for 3.94%.The drug sensitive test showed that the resistance of different bacteria to the same antibiotic was different.The same kind of bacteria showed different drug resistance to different antibiotics.The most effective drugs for Enterobactericaeae infection treatment was Imipenem.Pseudomonas aeruginosa was sensitive to all the antibiotics exept for ciprofloxacin,to which the drug resistance was was 80%.The drug-resistance rate of Staphylococcus aureus to erythromycin,SMZ-TMP and clindanmycin were all higher than 50%,while to the rest antibiotic was low.Conclusion The bacteria that caused the infection in patients were widely distributed in the department of orthopedics,antibi-otics should be properly chosen according to the results of microbial culture and antimicrobial susceptibility test.

A total of 59 untreated asthmatics and 47 healthy control subjects were recruited from Qianfoshan Hospital of Shandong Province from May 2011 to April 2012.Compared with healthy control subjects,the levels of IL-25 in induced sputum and eosinophils,IgE,interleukin-4 (IL-4) and interleukin25 (IL-25) in serum samples of asthmatics were significantly higher while the level of interferon-gamma (IFN-γ) were much lower.However,after inhaled glucocorticoid treatment,the levels of eosinophils,IL-4 and IL-25 decreased and IFN-γ significantly increased,while the level of IgE showed no significant changes.It was also found the expression of IL-25 was markedly positively correlated with the levels of eosinophils and IL-4 in serum and markedly negatively correlated with the levels of IFN-γ and had no relatio.

OBJECTIVE We designed the overall layout,formulated the functional demand,and optimized the key design and operating parameters of a new-style asepsis clean ward.The new-style ward intends to provide a higher quality environment for patient infection control and all-around protection during treatment.METHODS We applied computational fluid dynamics(CFD)simulation to optimize the design scheme according to Chinese and international hospital design specifications.RESULTS The new-style asepsis ward reflected a new idea,new technology,high standards and created a comfortable and safe,high-quality environment for the treatment of patient.The Satisfaction of patients was more than 95% and workload of nurses was alleviated obviously.CONCLUSIONS The new-style asepsis ward can significantly control the endogenous infection of patients.