2011年深圳市人群登革热抗体水平及影响因素分析

摘要：目的 了解深圳市人群登革病毒的感染情况,探讨影响人群登革热抗体产生的因素。 方法 2011年11月,随机抽取深圳市16~60岁人群907名,进行问卷调查并采集血清标本,用酶联免疫法（ELISA）检测登革热IgG抗体。结果 深圳市受检人群登革热IgG抗体阳性率为4.30%,以36~岁年龄组抗体阳性率最高。经非条件Logistic回归单因素和多因素分析,深圳市健康人群存在登革病毒的隐性感染,其中年龄较大、文化程度低、缺乏对登革热预防知识的了解、在深圳期间有在外露宿、现居住处周围蚊虫多和现居住处无防蚊设施等因素是登革热IgG抗体阳性率高的影响因素。结论 深圳市人群登革热隐性感染较常见,建议积极开展宣传教育,搞好环境卫生和个人防蚊工作。     

登革重组抗原与登革IgG抗体反应的敏感性和特异性分析

目的对登革重组包膜蛋白(E蛋白)抗原与登革病毒IgG抗体反应的敏感性和特异性进行评估和分析。方法将登革1-4型重组E蛋白抗原包被ELISA反应板,用间接法ELISA检测登革病人及其它血清样本登革病毒IgG抗体。结果重组抗原能检测出登革病人体内IgG抗体水平和变化情况,对2004年中山登革热疫情病人恢复期血清IgG抗体检出率达100%,无一漏检;在曾流行过登革热的疫区,能检出登革病毒IgG抗体阳性血清;重组抗原与乙脑病人血清没有交叉反应;评估结果显示“登革病毒IgG抗体检测试剂”的灵敏度为95·93%,特异度为96·86%。结论登革1-4型重组E蛋白抗原对登革病毒IgG抗体具较高的敏感性和特异性,可作为“登革病毒IgG抗体酶联免疫诊断试剂盒”开发的原材料。     

福建省1株登革Ⅱ型病毒的鉴定

目的对2005年福建省分离的1株登革病毒(DV)进行鉴定,并从分子水平追踪其可能的传染源。方法采用酶联免疫吸附试验(ELISA)检测疑似登革热患者血清中DV(IgM、IgG抗体;同时应用C6/36细胞、单克隆抗体间接免疫荧光(McAb-IFA)、逆转录(套式PCR法分别进行病毒的分离和鉴定,并对分离株的部分基因进行核苷酸序列分析。结果患者血清登革病毒特异性IgM抗体阳性、IgG抗体可疑,表明该患者在近期感染过登革病毒。患者血清接种C6/36细胞,观察到登革病毒特有的CPE。受感染的C6/36细胞能与登革病毒Ⅱ型单克隆抗体反应,表明分离的病毒株为登革Ⅱ型病毒。分离株的核酸提取物经RT(PCR扩增,登革病毒通用引物可扩增出511bp的特异性条带,型特异性引物扩增出119bp的特异性条带,进一步证实分离的病毒株为登革Ⅱ型病毒。分离株RT(PCR扩增产物的核苷酸序列与30株不同地域来源的登革Ⅱ型病毒相应序列构建的系统发生树表明,此毒株与东南亚地区的毒株比较接近。此次分离株的序列与1999年登革Ⅱ型病毒福建株的对应序列在亲缘关系上有一定程度距离。结合流行病学调查资料,进一步确定此病例为输入性感染病例。结论福建省首次从输入性登革热患者血清中分离出登革Ⅱ型病毒,该病毒来源于东南亚地区。     

云南省边境地区人群弓形虫感染血清流行病学调查

目的 了解云南省3个边境地区不同性别、年龄和民族的人群弓形虫感染状况,为该地区弓形虫病防控提供实验依据。方法 2015?11–2016?05在云南省中老、中越、中缅3个边境地区采集人群血样561份（中越边境222份、中老边境170份、中缅边境169份）,应用酶联免疫吸附试验（ELISA）检测血清中抗弓形虫IgG抗体。结果 云南省边境地区人群抗弓形虫IgG抗体总阳性率为7.84%(44/561) ,其中中越、中老、中缅边境地区人群抗弓形虫IgG抗体阳性率分别为8.56%（19/222）、8.82%（15/170）和5.92%（10/169）。汉族、哈尼族、傣族、苗族、拉祜族、基诺族、瑶族、彝族居民血清抗弓形虫抗体阳性率分别为5.63%（16/284）、10.96%（8/73）、13.70%（10/73）、4.17%（2/48）、11.11%（1/9）、7.69%（1/13）、12.00%（3/25）和11.11%（3/27）;少数民族居民血清抗弓形虫抗体总阳性率（10.11%,28/277）显著高于汉族（[χ2] = 3.884,P < 0.05）,傣族居民血清抗弓形虫抗体阳性率显著高于汉族（[χ2] = 5.594,P < 0.05）。11 ~ 20岁年龄组人群血清抗弓形虫IgG抗体阳性率最高,为23.53%（4/17）,显著高于0 ~ 10岁年龄组[4.23%（3/71）]（[χ2] = 4.593,P < 0.05）和31 ~ 40岁年龄组[4.00%（3/75）]（[χ2] = 4.997,P < 0.05）。结论 云南省边境地区人群存在不同程度弓形虫感染,少数民族居民感染率明显高于汉族,有必要加强对少数民族居民的弓形虫病防控健康宣教。     

妇科恶性肿瘤患者弓形虫感染血清流行病学调查

目的 了解妇科恶性肿瘤患者弓形虫感染情况,为后续该类人群弓形虫感染防控提供依据。方法 收集327例临床妇科恶性肿瘤患者血清样本,同时收集200例女性体检正常者血清作为对照,采用酶联免疫吸附试验（ELISA）检测血清抗弓形虫IgG和IgM抗体,分析不同人群抗弓形虫抗体阳性率差异。结果 327例妇科恶性肿瘤患者总体弓形虫感染率为26.91%（88/327）,高于健康体检者的5.00%（[χ2] = 39.36,[P< 0.01]）;其中血清抗弓形虫IgG抗体阳性率高于健康体检者（26.30% vs. 5.00%;[χ2] = 37.79,[P< 0.01]）,血清抗弓形虫IgM抗体阳性率与健康体检者差异无统计学意义（0.92% vs. 0;校正[χ2] = 0.58,[P> 0.01]）。卵巢癌、子宫颈癌和乳腺癌患者血清抗弓形虫IgG抗体阳性率分别为27.68%、25.47%和25.69%,均高于健康体检者（[χ2] = 32.35、27.32、28.00,P 均 < 0.01）,但卵巢癌、子宫颈癌和乳腺癌患者血清抗弓形虫IgG抗体阳性率差异无统计学意义（[χ2] = 0.17,[P> 0.05]）。卵巢癌、子宫颈癌和乳腺癌患者血清抗弓形虫IgM抗体阳性率分别为1.79%、0和0.92%,与健康体检者差异均无统计学意义（P 均 > 0.05）。结论 妇科恶性肿瘤患者弓形虫感染率较高,应加强妇科恶性肿瘤患者弓形虫感染防控。     

无锡地区3类人群弓形虫感染调查

目的　了解无锡地区类风湿性关节炎、恶性肿瘤、精神分裂症等3类人群刚地弓形虫感染情况,为后续该人群弓形虫感染防控提供数据支撑。方法　2016–2019年选择无锡地区经确诊的205例类风湿性关节炎病例、257例恶性肿瘤病例、235例精神分裂症病例作为调查对象,以250例健康体检者作为对照。采集全部研究对象人口学特征等相关数据,并采集血清。采用酶联免疫吸附试验检测研究对象血清弓形虫特异性IgG和IgM抗体水平,比较类风湿性关节炎、恶性肿瘤和精神分裂症病例与健康体检者血清抗弓形虫IgG和IgM抗体阳性率差异。结果　无锡地区类风湿性关节炎、恶性肿瘤和精神分裂症患者血清抗弓形虫IgG抗体阳性率分别为20.98%、24.12%和24.68%,均显著高于健康对照者（χ2 = 31.54、42.12和42.98,P均< 0.01）;类风湿性关节炎、恶性肿瘤和精神分裂症患者血清抗弓形虫IgM抗体阳性率分别为1.46%、2.72%和1.70%,与健康对照者血清抗弓形虫IgM抗体阳性率比较,差异均无统计学意义（χ2 = 0.06、1.52和0.21,P均> 0.05）。结论　无锡地区类风湿性关节炎、恶性肿瘤和精神分裂症患者血清抗弓形虫IgG抗体阳性率均显著高于健康体检者,后续应加强刚地弓形虫感染筛查,防止并发弓形虫感染引起的危害。     

无锡地区3类人群弓形虫感染调查

目的　了解无锡地区类风湿性关节炎、恶性肿瘤、精神分裂症等3类人群刚地弓形虫感染情况，为后续该人群弓形虫感染防控提供数据支撑。方法　2016–2019年选择无锡地区经确诊的205例类风湿性关节炎病例、257例恶性肿瘤病例、235例精神分裂症病例作为调查对象，以250例健康体检者作为对照。采集全部研究对象人口学特征等相关数据，并采集血清。采用酶联免疫吸附试验检测研究对象血清弓形虫特异性IgG和IgM抗体水平，比较类风湿性关节炎、恶性肿瘤和精神分裂症病例与健康体检者血清抗弓形虫IgG和IgM抗体阳性率差异。结果　无锡地区类风湿性关节炎、恶性肿瘤和精神分裂症患者血清抗弓形虫IgG抗体阳性率分别为20.98%、24.12%和24.68%，均显著高于健康对照者（χ2 = 31.54、42.12和42.98，P均< 0.01）；类风湿性关节炎、恶性肿瘤和精神分裂症患者血清抗弓形虫IgM抗体阳性率分别为1.46%、2.72%和1.70%，与健康对照者血清抗弓形虫IgM抗体阳性率比较，差异均无统计学意义（χ2 = 0.06、1.52和0.21，P均> 0.05）。结论　无锡地区类风湿性关节炎、恶性肿瘤和精神分裂症患者血清抗弓形虫IgG抗体阳性率均显著高于健康体检者，后续应加强刚地弓形虫感染筛查，防止并发弓形虫感染引起的危害。     

感染登革病毒后抗体产生规律及应用于暴发疫情的血清学诊断

目的了解感染登革病毒后特异性抗体产生规律,指导基层实验室应用血清抗体检测方法对暴发疫情的早期病例作出正确诊断,为控制暴发提供实验室依据。方法采集福建省1次暴发登革热疫情中的发热病人和密切接触者血清标本441份,以及恢复期血清22份,用捕获法ELISA检测登革IgG和IgM抗体,并结合病例的流行病学资料进行分析。结果根据本研究规定的病例判定标准,441例中登革热感染者为228例。其中,IgM抗体检出226例,IgG抗体检出119例。226例IgM抗体阳性标本中,IgG抗体同时阳性的为118份;119例IgG阳性标本中,IgM抗体阴性1例;两者均阴性的标本中用RT-PCR方法检测出1例。22份恢复期血清两类抗体检测均为阳性。绝大部分病例集中在10～70岁,病例的职业分布较广,男女比例为1∶1.53。结论登革病毒感染后特异性IgM抗体在发病早期即可检出,并可维持至少一个半月,但个别病例发病早期IgM可能为阴性;IgG抗体随病程的延长,其检出率逐步增高,至发病后50 d,其检出率可达95%左右。本研究结果抗体产生规律同以往研究结果一致,可为基层实验室开展登革热血清学检测和病例诊断提供参考。     

普洱市部分地区人群弓形虫感染血清流行病学调查

目的 目的 掌握云南省普洱市人群弓形虫感染状况, 为制定弓形虫病防治策略提供依据。 方法 方法 选择普洱市景 东、 景谷和孟连3个县作为调查点, 采用ELISA试剂盒检测人群血清弓形虫IgG抗体。 结果 结果 共检测血清906人份, 弓形 虫IgG抗体阳性率为24.17%。其中30～岁年龄组和60～岁年龄组IgG抗体阳性率较高, 分别为30.30% （60/198） 和 32.08% （17/53）; 不同年龄组间IgG抗体阳性率差异有统计学意义 （χ2 =17.77, P＜0.01）。不同性别、 文化程度、 生活习惯 之间阳性率差异无统计学意义 （P 均＞0.05）。农民、 学生和其他职业的IgG抗体阳性率分别为26.58% （194/730）、 15.49% （22/142） 和8.82% （3/34）, 差异有统计学意义 （χ2 =12.51, P＜0.01）; 猪饲养具有圈养和散养习惯人群的阳性率分别为 23.32% （198/849） 和36.84% （21/57）, 差异有统计学意义 （χ2 =5.33, P＜0.05）。结论 结论 普洱市部分地区人群弓形虫IgG抗 体阳性率较高, 应加强弓形虫病的防控和防治知识的健康教育。     

中缅部分边境地区登革热流行情况调查

目的了解中缅边境地区云南省盈江那邦镇和缅甸拉咱市登革热流行状况,为边境地区登革热防控提供科学依据。方法 2017年9-10月,在中缅边境地区中国云南盈江那邦镇和缅甸拉咱市各选3个调查点,采用背负式电动捕蚊器采集成蚊并用形态学方法鉴定蚊虫种类,捕获的蚊虫标本通过接种C6/36细胞分离病毒;采用间接酶联免疫吸附试验(ELISA)检测健康人群血清登革病毒IgG抗体;采用NS1抗原检测试剂检测疑似DF病例血清标本,阳性标本采用RT-PCR方法检测鉴定登革病毒血清型。结果共捕获6属14种703只蚊虫,其中登革热媒介埃及伊蚊为当地优势蚊种(57.75%,406/703),未发现埃及伊蚊携带登革病毒。采集的256份健康人血清中DENV IgG抗体阳性13份(5.08%,13/256),其中盈江那邦DENV IgG阳性率4.17%(4/96),缅甸拉咱5.63%(9/160),差异无统计学意义(χ~(2 )=0.265,P0.05);488份疑似登革热病人血清DENV阳性166份(34.02%,166/488),其中盈江那邦阳性83份(32.0%,83/259),缅甸拉咱阳性83份(36.24%,83/229)。从10份阳性标本中分离出5株DENV病毒,其中4株DENV-1(盈江那邦3株,缅甸拉咱1株),1株DENV-3(盈江那邦)。结论中缅边境地区盈江那邦镇和缅甸拉咱市登革热媒介埃及伊蚊分布广,DENV血清型主要以DENV-1为主,应加强中缅边境地区登革热疑似病例和媒介的监测。     

Kinetics of antibodies in sera, saliva, and urine samples from adult patients with primary or secondary dengue 3 virus infections.

OBJECTIVES: The kinetics of three serological markers (IgM, IgA, and IgG) in serum, saliva, and urine samples from adult patients with primary or secondary dengue infection were studied. DESIGN: Serum, saliva, and urine samples were collected from 22 patients with clinical and confirmed dengue 3 virus infection during the outbreak in Havana City in 2001. They were tested by capture IgM (MAC-ELISA), IgA (AAC-ELISA), and IgE (EAC-ELISA) and IgG ELISA inhibition method (EIM) to detect specific dengue antibodies. RESULTS: Similar kinetics were observed in IgM, IgA, and IgG antibodies in saliva and IgA and IgG in urine samples from secondary cases compared with kinetics in serum samples, although the values were lower. No IgG antibody was detected in saliva and urine samples in primary cases and IgM antibody was not detected in urine samples from either primary or secondary infection. All secondary cases were positive for IgG in saliva and urine samples at day 7. The kinetics of specific IgE antibodies in primary and secondary cases were different. CONCLUSIONS: The kinetics of three serological markers (IgM, IgA, and IgG) in serum, saliva, and urine samples from adult patients with primary or secondary dengue 3 virus infection were studied for the first time, showing its behavior and usefulness in dengue virus diagnosis. The specific IgE could play a role as a serological marker in secondary infections.     

Imported cases of dengue fever in Russia during 2010-2013

Objective:To confirm dengue infection among Russian tourists returned from Southeast and Mexico in 2010-2013 with clinical signs of infection.Methods:Blood and serum samples from patients were collected.NSI antigen and human IgM/IgG antibodies to dengue virus were identified using commercial tests manufactured by "Standard Diagnostics,INC.",Korea.ELISA test was used for the quantitative analyses of human IgM/IgG antibodies to dengue virus( "Orgenics Ltd.",Israel).Viral RNA was delected using commercial real-lime PCR lesls manufactured by "Genome Diagnostics Pvt.Ltd.",India and "Vector",Russia.Genotypes of revealed dengue viruses were determined employing nucleotide sequencing and phylogenetic analysis of 5'-UTR of the viral genome.Results:A total of 98 collected blood samples were analyzed.Fifty samples were positive for at least one of four markers of dengue infection.IgM to dengue virus were revealed in 38 samples,in 25 samples IgM were combined with IgG.NSI antigen was detected in43 samples.22 serum samples were positive for dengue virus RNA.The majority of samples(12patients) from tourists returned from Thailand were positive for genotype 1 of dengue virus,2nd and 4lh genotype were identified each in 1 patient.Conclusions:Due to laboratory confirmed cases of imported dengue fever in Russia,the differential diagnosis of dengue is strictly recommended for tourists returning from endemic areas.     

柯萨奇B组病毒感染与成人隐匿性自身免疫性糖尿病的关系

目的探讨柯萨奇B组病毒（CBV）感染与成人隐匿性自身免疫性糖尿病（LADA）的关系。方法采用1：2配比病例对照研究,以ELISA法对LADA、T2DM和非糖尿病（non-DM）组研究对象进行血清CBVIgM和IgG抗体检测。结果LADA、T2DM和non-DM三组CBVIgM抗体阳性率（分别为6．3％、2．1％和5．2％）及IgG抗体阳性率（分别为14．6％、9．4％和12．5％）的差别均无统计学意义;条件logistic回归分析也未发现血清CBVIgM和IgG抗体与LADA之间有统计学联系。结论本研究未发现血清CBVIgM和IgG抗体与LADA相关。     

Use of dengue NS1 antigen for early diagnosis of dengue virus infection

Accurate and timely diagnosis of dengue virus is important for early detection of dengue virus infection. In this study, the usefulness of the dengue NS1 antigen test was evaluated as a routine, rapid diagnostic test for dengue virus infection. A total of 208 sera from patients suspected of having dengue virus infection were collected and tested for dengue antibody, dengue genome and dengue NS1 antigen. Dengue antibody test, dengue PCR test and dengue antigen test were able to detect dengue virus infection from Days 1 to 8 in 72.8, 52.8 and 44.0% of samples, respectively. Of the 208 sera tested, 69.2% (144/208) of the acute sera were positive for dengue virus infection based on IgM antibody, IgG antibody, NS1 antigen and PCR tests. Thirty-two point two percent of the samples (67/208) were found positive for dengue NS1 antigen, 38.5% (80/208) were PCR positive, 40.9% (85/208) were IgM positive and 36.1% (75/208) were IgG positive for dengue virus. The results reveal the detection rate of dengue virus infection was similar for PCR and dengue antibody (65.9%) and for NS1 antigen and dengue antibody (62.0%) combinations. Therefore, the dengue NS1 antigen test can be used to complement the current antibody test used in peripheral laboratories. Thus, the combination of the NS1 antigen and antibody tests could increase the diagnostic efficiency for early diagnosis of dengue infection.     

Field- and laboratory-based active dengue surveillance in Chennai, Tamil Nadu, India: observations before and during the 2001 dengue epidemic

BACKGROUND: Dengue cases are reported every year in the city of Chennai, Tamil Nadu, India. Since April 2001, longitudinal field- and laboratory-based active dengue surveillance has been carried out in Chennai to study dengue trends. METHOD: A serologic survey of people in Chennai using the hemagglutination inhibition test (HIT) was performed to determine evidence of prior exposure to dengue virus infections. Dengue virus infections and their serotypes were demonstrated in vectors. The serum samples from clinical dengue patients were analyzed for dengue virus-specific immunoglobulins M (IgM) and G (IgG) antibodies by 2 commercial ELISA kits. RESULTS: There was an increase in the percentage of children with monotypic antibody responses to dengue in the later survey (April 2.2%, September 9.93%). DEN-3 serotype infections were demonstrated in male Aedes aegypti mosquitoes collected in September 2001. Dengue virus infection was diagnosed in 74.5% (143/192) of cases. While dengue-specific IgM responses were predominant among infants with dengue fever, IgG and mixed responses (M + G) were seen in 85% of the children with severe forms of dengue. CONCLUSION: The findings from these investigations suggest that antibody surveys in children and virus detection in vectors may be included as early warning system parameters in laboratory-based proactive dengue surveillance.     

新疆和田地区人群血清抗HEV水平调查

目的 调查新疆维吾尔族自治区(新疆)和田地区在1986-1989年戊型肝炎流行后,目前人群中血清抗戊型肝炎病毒(hepatitis E virus,HEV)特异性抗体水平及当地HEV感染的状态.方法 应用酶联免疫方法检测抗HEV IgG和抗HEVIgM,检测新疆和田地区1～90岁健康人血清3070例,对抗HEV IgM...     

广东南海市登革热病原学及血清学检测

目的　为了明确广东省南海市１９９８ 年夏、秋季一批发烧、出疹病人的诊断。方法收集疑似登革热（ＤＦ）患者血清５２份,应用逆转录 聚合酶链反应（ＲＴ ＰＣＲ）、病毒分离和间接免疫荧光技术分别进行了病原学和血清学检测。结果　从２５ 份发病早期患者血标本中分离病毒１０ 份,经用单克隆抗体间接免疫荧光检测和ＲＴ ＰＣＲ检测证实ＤＥＮ２ 型感染。ＩｇＧ抗体检测,阳性率为４６－１５％ （２４／５２） ,最高滴度达１∶１２８０,ＩｇＭ 抗体检测阳性率为６０％ （１５／２５）。部分病人双份抗体检测,抗体滴度４ 倍升高。结论　此次南海市登革热暴发流行为登革２ 型感染所致。     

IFAT检测登革热IgM抗体的初步探讨

目的探讨用间接免疫荧光试验（ＩＦＡＴ）检测登革热ＩｇＭ抗体。方法采集１９９５年７～１１月份广东省登革热Ⅰ型流行期间疑似患者发病１～７ｄ血清６２份,用ＩＦＡＴ检测登革热ＩｇＭ抗体。结果阳性率为２４．１９％（１５／６２）,发病４～５ｄ的阳性率最高为４０．００％以上。ＩｇＭ阳性滴度在１∶１０～１∶４０之间,多数为１∶１０（８／１５）。本法与乙脑血清有交叉反应,与其他非登革热血清无交叉反应。在发病５～６ｄ的患者中可同时检测出登革热的ＩｇＭ和ＩｇＧ抗体。结论发病１～３ｄ的血清可进行病毒分离,４～６ｄ的血清可检测ＩｇＭ抗体,如阴性则再检测ＩｇＧ,以提高登革热的检出率。