Retrospective analysis of childcare center disinfection in some regions of Anhui Province during 2019-2022 / 中国学校卫生

Objective@#To understand the status of childcare center disinfection around the COVID-19 pandemic, the needs of professional technical support, so as to give advice for improvement measures.@*Methods@#Using multi stage stratified sampling method, one was selected from each area of northern and southern Anhui Province, with 3 counties/districts selected from each city. A total of 54, 58, 60 childcare institutions were selected. A questionnaire survey, as well as on site visits and data check were administered in these childcare centers in Anhui Province were implemented. Information regarding the three stage disinfection work from 2019 to 2022 and technical support needs were collected.@*Results@#A total of 54, 58, 60 childcare centers were investigated in 2019, 2020 and 2021-2022. Most of the childcare centers recorded disinfection work (96.3%, 96.6%, 98.3%), while few of them ( 26.4% , 26.3%, 58.3%) monitored disinfection factor intensity. The implementing rate of disinfection effect evaluation was 68.3% at the stage of normal prevention and control, the highest demand rate for professional technical support was guidance and training ( 95.0% ), and the highest demand rate for training content was disinfectant preparation method (81.7%). There were significant differences in the rate of disinfection tableware room allocation (A: 93.3%, B: 70.0%), and the rate of disinfection effect evaluation among different cities (A: 53.3%, B: 83.3%)( χ 2=6.24, 5.46, P <0.05).@*Conclusions@#From 2019 to 2022, childcare center disinfection has significantly improved, however, disinfection factor intensity monitoring and disinfection effect evaluation are neglected during the stage of normal prevention and control. The demand for professional technical institutions to provide disinfectant preparation method guidance and training is high.It is suggested to strengthen the monitoring and evaluation of disinfection and related technical guidance.

Experimental study of improved sclerotherapy injection in rat model of vertebral arteriocervical spondylopathy / 中国骨伤

OBJECTIVE@#To improve the rat model of cervical spondylosis of vertebral artery type (CSA) induced by injecting sclerosing agent. To evaluate the efficacy of injecting sclerosing agent to induce CSA.@*METHODS@#Forty Health SPF SD rats(20 males and 20 females), were randomly divided into two groups:the model group (20) and the blank group (20). All the animals were followed up for 4 weeks for the observation of general situation, transcranial Doppler(TCD) detection of blood flow velocity, pulsatility index and resistive index of the vertebral artery, measurement of mental distress by open-field test.@*RESULTS@#One to two days after establish the animal model, rats in the model group appeared apathetic with decreased autonomic activities, trembling, squinting, increased eye excrement, etc., and no rats died during the experiment. The mean blood flow velocity of the model group was lower than that of the blank group (P<0.05), and the pulsatilit index and resistive index of the model group were higher than that of the blank group (P<0.05). The mental distress of the model group was significantly higher than that of the blank group.@*CONCLUSION@#The modified injection of sclerosing agent is a practical method to establish the rat model of CSA, with high success rate, high stability, low mortality and simple operation.

Clinical efficacy of combined therapy in children with stage 4 neuroblastoma / 中国当代儿科杂志

OBJECTIVES@#To study the early clinical efficacy of combined therapy of stage 4 neuroblastoma.@*METHODS@#A retrospective analysis was performed on the medical data and follow-up data of 14 children with stage 4 neuroblastoma who were diagnosed in Hong Kong University-Shenzhen Hospital from January 2016 to June 2021.@*RESULTS@#The median age of onset was 3 years and 7.5 months in these 14 children. Among these children, 9 had positive results of bone marrow biopsy, 4 had N-Myc gene amplification, 13 had an increase in neuron-specific enolase, and 7 had an increase in vanilmandelic acid in urine. Based on the results of pathological examination, differentiated type was observed in 6 children, undifferentiated type in one child, mixed type, in one child and poorly differentiated type in 6 children. Of all the children, 10 received chemotherapy with the N7 regimen (including 2 children receiving arsenic trioxide in addition) and 4 received chemotherapy with the Rapid COJEC regimen. Thirteen children underwent surgery, 14 received hematopoietic stem cell transplantation, and 10 received radiotherapy. A total of 8 children received Ch14.18/CHO immunotherapy, among whom 1 child discontinued due to anaphylactic shock during immunotherapy, and the other 7 children completed Ch14.18/CHO treatment without serious adverse events, among whom 1 child was treated with Lu177 Dotatate 3 times after recurrence and is still undergoing chemotherapy at present. The median follow-up time was 45 months for all the 14 children. Four children experienced recurrence within 2 years, and the 2-year overall survival rate was 100%; 4 children experienced recurrence within 3 years, and 7 achieved disease-free survival within 3 years.@*CONCLUSIONS@#Multidisciplinary combined therapy is recommended for children with stage 4 neuroblastoma and can help them achieve better survival and prognosis.

Establishment of a rapid risk assessment system for imported COVID-19 cases / 中华流行病学杂志

Objective: To develop a rapid risk assessment tool for imported COVID-19 cases and provide reference evidences for prevention and control of COVID-19 at ports. Methods: The information about COVID-19 pandemic and control strategies of 12 concerned countries was collected during July to August 2021, and 12 indexes were selected to assess the importation risk of COVID-19 by risk matrix. Results: The risk for imported COVID-19 cases from 12 countries to China was high or extremely high, and the risk from Russia and the USA was highest. Conclusions: The developed rapid risk assessment tool based on the risk matrix method can be used to determine the risk level of countries for imported COVID-19 cases to China at ports, and the risk of imported COVID-19 was high at Beijing port in August 2021.

Immunogenicity of Whole / 生物医学与环境科学（英文）

Objectives@#To evaluate the immunogenicity of @*Methods@#Protein extracts from @*Results@#Immunization with @*Conclusion@#This is the advanced study to investigate the immunogenicity of

Polymorphism of P66 in / 生物医学与环境科学（英文）

Objective@#To study the polymorphism in P66 and its human B-cell epitopes of @*Methods@#Polymerase chain reaction (PCR) and sequencing were used to obtain the P66 sequences of 59 Chinese @*Results@#Results showed that genetic and amino acid diversity presented in the 66 kD protein of all 59 Chinese strains, especially in @*Conclusion@#In P66 of 59 Chinese strains, polymorphisms were widely distributed. More importantly, the P66 amino acid sequences of

Chemical constituents from whole plants of Scutellaria viscidula / 中草药

Objective: To investigate the chemical constituents from the whole plants of Scutellaria viscidula. Methods: By means of preparative HPTLC and column chromatography over silica gel and Sephadex LH-20, the chemical constituents were isolated and purified. Their structures were elucidated by physico-chemical properties and spectral analyses. Results: A total of 22 compounds were isolated and identified as: 5-hydroxy-7,8-dimethoxyflavone (1), chrysin (2), 5,7-dimethoxyflavone (3), 5,7,4’-trihydroxy- 6-methoxyflavone (4), 5,7,4’-trihydroxyflavonoid (5), 5,7,2’-trihydroxy-8-methoxyflavone (6), 5,7-dihydroxy-8,2’-dimethoxyflavone (7), 5,7,2’-trihydroxy-6-methoxyflavanone (8), 5-hydroxy-6,7,8-trimethoxyflavone (9), 5,6,7-trimethoxyflavone (10), 3,5-dimethoxy- 6,7-methylenedioxyflavone (11), 5,2’-dihydroxy-7,8,6’-trimethoxyflavone (12), 5,2’-dihydroxy-7,8,6’-trimethoxyflavanone (13), 5,7-dimethoxyflavanone (14), 7-methoxy-chrysin (15), 2’-hydroxy-5,7,8-trimethoxyflavone (16), ferulic acid (17), 4-hydroxy-3- methoxybenzoic acid (18), p-hydroxy-benzaldehyde (19), 3,5-dimethoxy-4-hydroxybenzoic acid (20), 7-hydroxy-6-methoxy-coumarin (21), 6,7-dihydroxyl-coumarin (22). Conclusion: Compounds 1, 3-16, 18 and 20 are isolated from Scutellaria viscidula for the first time.

StudyoncognitiveimpairmentandriskfactorsinpatientswithWilsondisease / 中国神经精神疾病杂志

Objective To explore cognitive impairment and related factors in patients with Wilson disease (WD) and to screen the risk factors of cognitive impairment in order to provide evidence for clinical intervention. Methods The Chinese Version Addenbrooke＇s Cognitive Examination-III (ACE-III-C) was used to assess the cognitive function. The WD patients with cognitive impairment were analyzed the difference between those with non-cognitive disorders in the Young scale, Baethel scale and biochemical indicators. Risk factors for cognitive impairment in WD patients were analyzed by multiple linear regression. Results Cognitive impairment occurred in 43 (59.7%) of 72 patients with WD. ACE-III-C total score, attention, memory, language fluency, visual spatial factor scores, Young scores, Barthel scores and serum copper levels were significantly different between patients with cognitive impairment and patients with non-cognitive impairment (P＜0.01). Linear regression analysis showed that serum copper levels were the most important risk factors for ACE-III-C total score and cognitive subfields (P＜0.01). Serum zinc levels as a secondary risk factor of language fluency and visual space (P＜0.05). Age-related participation affected language fluency (P＜0.05). Conclusions Serum copper and zinc levels may be the main risk factors of cognitive impairment. Modulation of serum copper and zinc levels may be the key for intervention to treat cognitive impairment in WD patients.

Influence of nicorandil on vascular endothelial function and serum inflammatory reaction in CHD pa-tients undergoing PCI / 心血管康复医学杂志

Objective :To study influence of nicorandil on vascular endothelial function and serum inflammatory reac-tion in patients with coronary heart disease (CHD) undergoing percutaneous coronary intervention (PCI).Methods :A total of 118 CHD patients undergoing PCI in our hospital were randomly divided into routine treatment group (n＝58) and nicorandil group (n＝60 ,received nicorandil based on routine treatment ) ,both groups were treated for six months .Endothelial function ,levels of inflammatory factors and myocardial injury markers before and after treatment ,and incidence of major adverse cardiovascular events (MACE) were observed and compared between two groups.Results : Compared with routine treatment group after treatment ,there were significant rise in radial artery reactive hyperemia inner diameter [D1 ,(3-83 ± 0-37) mm vs.(4-01 ± 0-39) mm] ,flow-mediated dilation of bra-chial artery [FMD ,(14-33 ± 1-42 )% vs.(19-35 ± 1-95 )%] ,serum levels of nitric oxide [NO , (70-72 ± 7-82 ) μmol／L vs .(86-15 ± 8-52) μmol／L] and interleukin-10 [IL-10 ,(392-86 ± 40-19) ng／ml vs.(472-75 ± 48-62) ng／ml] ,and significant reductions in serum levels of endothelin-1 [ET-1 ,(70-29 ± 7-39) ng／L vs.(59-62 ± 6-02) ng／L ] ,intercellular adhesion molecule-1 [ICAM-1 ,(195-68 ± 20-48) μg／L vs.(146-72 ± 15-07) μg／L] ,cardiac tropo-nin I [cTnI ,(0-471 ± 0-071) ng／ml vs.(0-222 ± 0-052) ng／ml] ,creatine kinase isoenzyme MB [CK-MB ,(27-62 ± 3-72) U／L vs.(14-79 ± 1-52) U／L] ,mean platelet volume [MPV ,(10-26 ± 1-06) fl vs.(9-75 ± 0-95) fl] ,high sensitive C reactive protein [hsCRP , (5-36 ± 0-63 ) mg／L vs.(3-08 ± 0-27 ) mg／L ] , in-stent restenosis rate (20-69% vs.1-67%) and incidence rate of MACE (67-24% vs.10-00%) in nicorandil group ,P＜0-05 or ＜0-01-Conclusion : Nicorandil can improve postoperative endothelial function ,reduce inflammatory reaction ,protect myo-cardial cells with good prognosis in CHD patients undergoing PCI ,which is worth extending .

Overexpression of long noncoding RNA HMMR-AS1 promotes progression of lung adenocarcinoma / 临床检验杂志

Objective@#The purpose of this study is to explore the biological function of long non-coding RNA (lncRNA) HMMR-AS1 in proliferation and metastasis of lung adenocarcinoma (LUAD). @*Methods@#Real-time fluorescence quantitative polymerase chain reaction (RT-qPCR) was used to detect the expression of HMMR-AS1 and its sense strand HMMR in LUAD cell lines. Then we knock down the HMMR-AS1 expression through small interfering RNA and evaluate the transfection efficiency and its effect on the expression of HMMR. CCK-8 (cell counting kit), clone formation, flow cytometric analysis, wound scratch assay and transwell assay were used to assess the biological function of A549 and H1299 cells. Western blot was used to detect the protein expression of HMMR in the two cell lines after transfection with si-HMMR-AS1. @*Results@#The expression of HMMR-AS1 in A549 and H1299 cells of LUAD cell line was markedly higher than that in normal lung epithelial cell BEAS-2A by upregulating approximately 3.06 and 5.02 folds (P＜0.05), respectively. After transfection with si-HMMR-AS1, the expression of HMMR-AS1 markedly reduced in both levels of transcription and protein (P＜0.05). Furthermore, knocking down of HMMR-AS1 significantly inhibited the proliferation, migration and invasion abilities, and increased the apoptosis rates of A549 and H1299 cells. @*Conclusion@#LncRNA HMMR-AS1 could promote malignant progression of LUAD cells through enhancing the growth, migration and invasion ability of LUAD cells.

Emergency Response for a Laboratory Biosafety Incident / 生物医学与环境科学（英文）

On December 14, 2017, a faculty member of a university in Hunan Province reported that an anthrax vaccine strain might have recovered virulence during an undergraduate experiment and potential exposure could not be ruled out for the students involved. Upon receiving the case report, the CDC, health bureaus, and local governments at the county, prefectural, and provincial levels promptly organized experts in different fields (including epidemiologists, biosafety experts, and laboratory testing experts) for case investigation, evaluation, and response. As the investigation results showed, no virulence recovery was identified in the involved anthrax vaccine strain; and no contamination of Bacillus anthracis was detected at the involved areas. Thus, the university returned to normal functioning.

Immunological Evaluation of a Novel Mycobacterium tuberculosis Antigen Rv0674 / 生物医学与环境科学（英文）

OBJECTIVE@#This study aimed to characterize the diagnostic and vaccine potential of a novel Mycobacterium tuberculosis antigen Rv0674.@*METHODS@#To evaluate the diagnostic potential and antigenicity of Rv0674, IgG was evaluated using ELISA and interferon (IFN)-γ was done by using ELISpot assay among TB patients and healthy donors. For immunogenicity evaluation, BALB/c mice were immunized with Rv0674. Cytokine production was determined by cytokine release assay using an ELISA kit, and the antibodies were tested using ELISA.@*RESULTS@#The results of serum Elisa tests showed that Rv0674 specific immunoglobulin G (IgG) response was higher in TB patients than negative controls. And Rv0674 had good performance in serological test with sensitivity and specificity of 77.1% and 81.1%, respectively. While it shows poor sensitivity and specificity of 26.23% and 79.69% for IFN-γ tests. In BALB/c mice, Rv0674 adjuvant by DDA/Poly I:C could also induce a high level of IFN-γ, interleukin-2 and interleukin-6 as well as a high IgG titer in both high- and low-dose groups indicating that Rv0674 is essential in humoral and cellular immunity. Moreover, the cytokine profile and IgG isotype characterized Rv0674 as a Th1/Th2-mixed-type protective immunity with the predominance of Th1 cytokines.@*CONCLUSION@#Rv0674 may be a good potential candidate for the development of TB serological diagnosis and a new TB vaccine.

Correlation between serum thyroid hormones with glucose and lipid metabolism in children with type 1 diabetes / 中华内分泌外科杂志

Objective To explore the correlation of serum thyroid hormones with glucose and lipid metabolism in children with type 1 diabetes (T1DM) whose thyroid functions with normal.Methods 50 T1DM and 71 healthy children were enrolled in our study.Their blood glucose,lipid,HbA1c and thyroid functions were determined.Results Compared with the control group,patients with T1DM had higher low density lipoproteincholesterol (LDL-C),triglyceride(TG),fasting blood glucose (FBG) and HbA1c while with lower high density lipoprotein-cholesterol (HDL-C),thyroid Stimulating Hormone (TSH),and free triiodothyronine (FT3) (P＜0.05).In children with T1DM,TSH was positively correlated with LDL-C (r=0.175,P=0.034),total cholesterol (TC)(r=0.187,P=0.009) and TG(r=0.206,P=0.005) while negatively correlated with FBG(r=-0.187,P=O.018) and HbA1c (r=-0.264,P＜0.001).FT3 was negatively correlated with TG (r=-0.185,P=O.012),FBG (r=-0.193,P=O.O07) and HbA1c 0=-0215,P=0.002).But there were no correlations of FT4 with glucose or lipid metabolism.Conclusion TSH and FT3 are significantly correlated with glucose and lipid metabolism in children with T1DM.

Preliminary Study on Drug Susceptibility Profile and Resistance Mechanisms to Macrolides of Clinical Isolates of Non-tuberculous Mycobacteria from China / 生物医学与环境科学（英文）

<p><b>OBJECTIVE</b>Macrolide susceptibility and drug resistance mechanisms of clinical non-tuberculous mycobacteria (NTM) isolates were preliminarily investigated for more accurate diagnosis and treatment of the infection in China.</p><p><b>METHODS</b>Four macrolides, including clarithromycin (CLAR), azithromycin (AZM), roxithromycin (ROX), and erythromycin (ERY), were used to test the drug susceptibility of 310 clinical NTM isolates from six provinces of China with the broth microdilution method. Two resistance mechanisms, 23S rRNA and erm, were analyzed with nucleotide sequence analysis.</p><p><b>RESULTS</b>Varied effectiveness of macrolides and species-specific resistance patterns were observed. Most Mycobacterium abscessus subsp. massiliense were susceptible and all M. fortuitum were highly resistant to macrolides. All the drugs, except for erythromycin, exhibited excellent activities against slow-growing mycobacteria, and drug resistance rates were below 22.2%. Only four highly resistant strains harbored 2,058/2,059 substitutions on rrl and none of other mutations were related to macrolide resistance. G2191A and T2221C on rrl were specific for the M. abscessus complex (MABC). Seven sites, G2140A, G2210C, C2217G, T2238C, T2322C, T2404C, and A2406G, were specifically carried by M. avium and M. intracellulare. Three sites, A2192G, T2358G, and A2636G, were observed only in M. fortuitum and one site G2152A was specific for M. gordonae. The genes erm(39) and erm(41) were detected in M. fortuitum and M. abscessus and inducible resistance was observed in relevant sequevar.</p><p><b>CONCLUSION</b>The susceptibility profile of macrolides against NTM was demonstrated. The well-known macrolide resistance mechanisms, 23S rRNA and erm, failed to account for all resistant NTM isolates, and further studies are warranted to investigate macrolide resistance mechanisms in various NTM species.</p>

A Retrospective Study of Culture-confirmed Mycobacterial Infection among Hospitalized HIV-infected Patients in Beijing, China / 生物医学与环境科学（英文）

A retrospective analysis was performed in two major HIV/AIDS referral hospitals in Beijing to evaluate the prevalence of Mycobacterium tuberculosis (MTB) and non-tuberculous mycobacterial (NTM) infections in HIV-infected patients. A total of 627 patients' data were reviewed, and 102 (16.3%) patients were diagnosed with culture-confirmed mycobacterial infection, including 84 with MTB, 16 with NTM, and 2 with both MTB and NTM. The most frequent clinical complication by mycobacterial infection was pulmonary infection (48/102, 47.1%). The overall rates of multidrug-resistant TB (MDR-TB) and extensively drug-resistant TB (XDR-TB) were 11.9% and 3.4%, respectively. This study underlines the urgent need to intensify screening for mycobacteria coinfection with HIV and to prevent the spread of drug-resistant TB among HIV-infected patients.

Application value of detecting Mycobacterium tuberculosis specific IgG/IgM antibodies for tuberculosis diagnosis with colloidal gold immunochromatography assay / 中国人兽共患病学报

In this study,we estimated the application value of detecting Mycobacterium tuberculosis (MTB) specific IgG/IgM antibodies for tuberculosis diagnosis with colloidal gold immunochromatography assay (GICA).We collected 332 effective serum samples and their background information,including 260 patients with tuberculosis and 72 healthy individuals.The means of GICA was used to detect MTB specific IgG/IgM antibodies.Results were compared with the clinical diagnosis and the results of bacteriological tests.The SPSS 22.0 software was used to analyze the results,and when P＜0.05 the difference was statistically significant.The sensitivity and specificity of GICA were 41.15％ and 91.67％,and the sensitivity of the bacterial positive and negative patients were 51.38％ and 33.77％,respectively.The positive rate of IgG/IgM antibodies detection with GICA (41.15％) was much higher than that of bacteria with acid-fast stain of sputum smear (18.84％) and sputum bacteria cultivation (36.15 ％) (P ＜ 0.05) respectively.The positive rate of the combination of tuberculosis antibody detection,sputum bacterial culture and sputum smear was 61.54％,higher than the result of single method or combination of two methods.The detection of specific antibodies against MTB in serum with GICA is sensitive,specific,rapid and convenient,which can be used in clinical screening.Meanwhile,there are still certain limitations of this method,and the sensitivity and specificity need to be improved.Therefore,the GICA can be used as an auxiliary diagnosis combined with sputum bacteriology,imaging test and clinical features rather than diagnose tuberculosis alone.

First Report in China on the Identification and Drug Sensitivity of Mycobacterium elephantis Isolated from the Milk of a Cow with Mastitis / 生物医学与环境科学（英文）

<p><b>OBJECTIVE</b>In this study, milk from a cow with mastitis was analyzed to determine the presence of mycobacterial infection. Milk quality and security problems pertaining to the safe consumption of dairy products were also discussed in this study.</p><p><b>METHODS</b>Milk was preprocessed with 4% NaOH. Then, mycobacteria were isolated from the milk sample on L-J medium. The isolate was identified using multiple loci Polymerase Chain Reaction (PCR) and multi-locus sequence analysis with 16S rRNA, sodA, hsp65, and ITS genes. The drug sensitivity of the isolate to 27 antibiotics was tested through alamar blue assay.</p><p><b>RESULTS</b>Smooth, moist, pale yellow colonies appeared on the L-J medium within a week after inoculation. Based on the results of multiple loci PCR analysis, the isolate was preliminarily identified as non-tuberculous mycobacteria. The 16S rRNA, SodA, hsp65, and ITS gene sequences of the isolate exhibited 99%, 99%, 99%, and 100% similarities, respectively, with those of the published reference strains of Mycobacterium elephantis (M. elephantis). The drug sensitivity results showed that the strain is resistant to isoniazid, p-aminosalicylic acid, and trimesulf but is sensitive to ofloxacin, rifampicin, amikacin, capreomycin, moxifloxacin, kanamycin, levofloxacin, cycloserine, ethambutol, streptomycin, tobramycin, rifabutin, ciprofloxacin, linezolid, cefoxitin, clarithromycin, and minocycline.</p><p><b>CONCLUSION</b>To the best of our knowledge, this study is initially to report the isolation of M. elephantis from the milk of a cow with mastitis in China.</p>

The relationship between nerve fiber bundle and muscle strength recovery in patients with acute ischemic stroke observed by magnetic resonance diffusion tensor imaging / 重庆医学

Objective To investigate the correlation between FA value,ADC value and limb muscle strength score measured by magnetic resonance imaging in patients with ischemic stroke,aims to to analyze the clinical value of magnetic resonance imaging in limb muscle strength.Methods Twenty patients with acute cerebral infarction and treated from June 2015 to Junly 2016 were recruited from This hospital,and the simplified Fugl-Meyer motor function score was observed for all patients within 3 days.Tensor imaging examination was conducted to observe the distribution of nerve fiber bundles,FA value,ADC value changes.Results The FA value and ADC value of the infarct side were significantly different from those of the contralateral side(t=8.70,t=-18.70,P＜0.05);There were significant differences in FA value and ADC value between the infarcted ventricle hind limbs and the contralateral side of the infarcted ventricle(t=-5.16,t=-5.08,P＜0.05).The FA value of the infarcted ventral hind limbs had positive correlation with the simplified Fugl-Meyer motor function score(R=0.863,P=0.013).Conclusion FA value and ADC value of acute infarct and internal hindlimb are lower than FA value and ADC value of contralateral normal white matter.The FA value of internal capsule hind limbs is closely related to the simplified Fugl-Meyer motor function score.

Evaluation of Six Recombinant Proteins for Serological Diagnosis of Lyme Borreliosis in China / 生物医学与环境科学（英文）

<p><b>OBJECTIVE</b>In this study, we evaluated the diagnostic efficiency of six recombinant proteins for the serodiagnosis of Lyme borreliosis (LB) and screened out the appropriate antigens to support the production of a Chinese clinical ELISA (enzyme-linked immunosorbent assay) kit for LB.</p><p><b>METHODS</b>Six recombinant antigens, Fla B.g, OspC B.a, OspC B.g, P39 B.g, P83 B.g, and VlsE B.a, were used for ELISA to detect serum antibodies in LB, syphilis, and healthy controls. The ELISA results were used to generate receiver operating characteristic (ROC) curves, and the sensitivity and specificity of each protein was evaluated. All recombinant proteins were evaluated and screened by using logistic regression models.</p><p><b>RESULTS</b>Two IgG (VlsE and OspC B.g) and two IgM (OspC B.g and OspC B.a) antigens were left by the logistic regression model screened. VlsE had the highest specificity for syphilis samples in the IgG test (87.7%, P<0.05). OspC B.g had the highest diagnostic value in the IgM test (AUC=0.871). Interactive effects between OspC B.a and Fla B.g could reduce the specificity of the ELISA.</p><p><b>CONCLUSION</b>Three recombinant antigens, OspC B.g, OspC B.a, and VlsE B.a, were useful for ELISAs of LB. Additionally, the interaction between OspC B.a and Fla B.g should be examined in future research.</p>

Rapid detection of rifampin-resistant clinical isolates of Mycobacterium tuberculosis by reverse dot blot hybridization / 生物医学与环境科学（英文）

<p><b>OBJECTIVE</b>A PCR-reverse dot blot hybridization (RDBH) assay was developed for rapid detection of rpoB gene mutations in 'hot mutation region' of Mycobacterium tuberculosis (M. tuberculosis).</p><p><b>METHODS</b>12 oligonucleotide probes based on the wild-type and mutant genotype rpoB sequences of M. tuberculosis were designed to screen the most frequent wild-type and mutant genotypes for diagnosing RIF resistance. 300 M. tuberculosis clinical isolates were detected by RDBH, conventional drug-susceptibility testing (DST) and DNA sequencing to evaluate the RDBH assay.</p><p><b>RESULTS</b>The sensitivity and specificity of the RDBH assay were 91.2% (165/181) and 98.3% (117/119), respectively, as compared to DST. When compared with DNA sequencing, the accuracy, positive predictive value (PPV) and negative predictive value (NPV) of the RDBH assay were 97.7% (293/300), 98.2% (164/167), and 97.0% (129/133), respectively. Furthermore, the results indicated that the most common mutations were in codons 531 (48.6%), 526 (25.4%), 516 (8.8%), and 511 (6.6%), and the combinative mutation rate was 15 (8.3%). One and two strains of insertion and deletion were found among all strains, respectively.</p><p><b>CONCLUSION</b>Our findings demonstrate that the RDBH assay is a rapid, simple and sensitive method for diagnosing RIF-resistant tuberculosis.</p>