荧光定量对肺炎支原体IgM抗体诊断效能的影响

目的:探讨荧光定量对肺炎支原体IgM抗体诊断效能的影响.方法:选取 186 例我院 2020 年 4 月至 2022年 4 月就诊于我院的呼吸道感染疑似肺炎支原体感染患儿作为研究对象.入院后均采用荧光定量聚合酶链式反应(Polymerase chain reaction,PCR)法、酶联免疫吸附(Enzyme linked immunosorbent assay,ELISA)法对肺炎支原体 IgM 抗体进行检测.以间接荧光免疫法检测结果为"金标准",比较荧光定量 PCR、ELISA 法对肺炎支原体IgM抗体诊断结果.结果:经间接荧光免疫法检测结果显示,186 例呼吸道感染患儿中,肺炎支原体IgM抗体阳性 102 例,经荧光定量PCR检测结果显示,肺炎支原体IgM抗体阳性 94 例,经ELISA法检测结果显示,肺炎支原体IgM抗体阳性 85 例;与ELISA法比较,荧光定量PCR法对于IgM抗体阳性诊断灵敏度、准确度较高,漏诊率较低(P＜0.05).结论:荧光定量PCR可有效提高肺炎支原体感染诊断准确效能,为临床早期诊断提供参考.     

应用荧光定量PCR及ELISA法检测弓形虫感染分析

目的 :为了准确检测产前优生咨询妇女弓形虫感染及掌握不同时期弓形虫的量值变化情况。方法 :本室采用荧光定量PCR技术并结合ELISA法同时对 16 98例产前妇女进行联合检查。并将其结果进行对照分析。结果 :发现ELISA不同抗体阳性率和荧光定量PCR阳性率在检测结果上有一定的差异。在ELISA抗体仅一项阳性的患者中 ,IgG抗体阳性其荧光定量PCR检测值也为阳性的百分率最高 ,达 88.9% ,(P >0 .0 5 ,无差异 )。其次为IgM抗体阳性 ,符合率达 6 2 .5 % (P <0 .0 5 ,有差异 )。Cag循环抗原阳性最低 ,仅 31.8% (P <0 .0 1,有显著差异 )。在二项抗体同为阳性的患者中 ,IgG和IgM双阳其荧光定量PCR检测也为阳性的百分率最高 ,达 98.5 %。IgG与Cag双阳、IgM与Cag双阳的分别为 86 .8%、85 .4%。对 3项抗体全为阳性的 3名患者来说 ,两种方法结果一致。另外在 12 14名ELISA阴性的患者中 ,用荧光定量PCR法仍检测 5例阳性 ,阳性率为 0 .41%。结论 :由于荧光定量PCR技术增加了探针杂交 ,它的特异性及准确性都大大提高 ,可靠程度优于ELISA ,具有重要的临床参考价值。但在人体感染的某些时期 (Igm ,Cag单项阳性时 )荧光定量PCR法也会存在漏诊的情况。由此可见 ,这两种方法都各有其优缺点 ,只有将两种方法有机结合起来 ,才能对弓     

浙江省首次发现新型布尼亚病毒感染病例及分离病毒分子鉴定

目的 了解浙江省是否存在新型布尼亚病毒潜在自然疫源地,分离疑似病例血清中新型布尼亚病毒并进行鉴定.方法 免疫荧光法检测浙江省台州地区野生啮齿动物不同组织标本中新型布尼亚病毒抗原.实时荧光定量RT-PCR检测疑似病人血清中新型布尼亚病毒核酸,扩增产物进行序列测定.Vero细胞分离疑似病人血清中新型布尼亚病毒,以新型布尼亚病毒株核衣壳蛋白编码基因为靶基因,采用RT-PCR及扩增产物测序对分离的疑似新型布尼亚病毒株进行鉴定,另对该序列进行同源性分析和比较.结果 70只野生啮齿动物中,免疫荧光法检测阳性率为5.71%.实时荧光定量RT-PCR检测结果显示,4例疑似病人血清中有两例检测结果阳性.1例阳性血清样本中分离出1株疑似新型布尼亚病毒,RT-PCR和测序结果证实该病毒确为新型布尼亚病毒,其核衣壳蛋白编码基因序列与湖北省新型布尼亚病毒分离株相似性高达92.2%,但与国内其他地区新型布尼亚病毒分离株序列差异较大.结论 首次证实浙江省存在新型布尼亚病毒自然疫源地及感染病人,不同群新型布尼亚病毒分布可能存在一定的地理差异.     

抗Fas的抗体在实验性病毒性心肌炎中作用机制的研究

目的探讨中和型抗Fas的抗体对小鼠柯萨奇病毒性心肌炎的治疗作用及作用机制。方法60只BAIB/c小鼠随机分为4组：1组空白对照组，2组病毒对照组、3组IgG对照组、4组抗Fas抗体治疗组。于接种后第10天每组随机处死小鼠8只，心肌组织切片HE染色了解心肌损伤情况，电镜技术及原位末端标记法（TUNEL）检测心肌细胞凋亡情况，免疫组化方法检测casimse-3的表达，逆转录．聚合酶链反应（RT-PCR）检测心肌组织中easpase-3的mRNA表达。实时定量PCR（RQ-PCR）定量心肌柯萨奇病毒B3（CVB3）mRNA拷贝数。结果（1）病毒对照组可见caspase-3表达和心肌细胞凋亡，且均与心肌病变积分成正相关（r=0．81，P〈0．01；r=0．73，P〈0．05）。（2）抗Fas抗体治疗组小鼠心肌组织病变积分、心肌细胞凋亡率、caspase-3蛋白和mRNA表达及心肌内CVB3 mRNA拷贝数均明显低于病毒对照组（P〈0．05）和IgG对照组（P〈0．05）。结论Fas/FasL途径介导的心肌细胞凋亡参与了病毒性心肌炎的发病过程，凋亡是导致病毒性心肌炎心肌损伤的重要机制之一，抗Fas抗体可降低caspase-3活化和mRNA表达，减少心肌细胞凋亡，降低心肌细胞内病毒复制，使心肌损伤明显减轻。     

马尔堡、埃博拉病毒双重荧光定量PCR检测方法的建立

目的 建立一种快速、敏感、特异的双重实时荧光定量PCR方法,可同时检测马尔堡病毒和埃博拉病毒.方法 通过序列比对挑选出两种病毒基因组中高度保守的序列,分别设计引物及Taqman探针,两条探针分别标记FAM和Texas Red荧光报告基因,建立双重实时荧光定量PCR反应体系.结果 双重荧光定量PCR方法检测两种病毒阳性标准品的灵敏度分别为30.5拷贝/μl和28.6拷贝/μl,通过检测日本脑炎病毒、黄热病毒、登革热病毒无交叉反应,有较好的灵敏度和特异性.结论 建立了马尔堡、埃博拉病毒双重荧光定量PCR检测方法,实现了两种病毒同时实时定量检测,在传染病防控领域有较好的应用前景.     

柯萨奇病毒IgM抗体胶体金免疫层析快速诊断试纸条的研制

目的建立一种快速检测柯萨奇病毒IgM抗体的胶体金免疫层析试纸条，并优化制备中各关键步骤的实验条件。方法以柠檬酸三钠还原法制备20nm的胶体金溶液，标记羊抗人IgM，制备免疫胶体金复合物，组装胶体金免疫层析快速诊断试纸条。结果用柠檬酸还原法制备的20nm胶体金溶液呈亮红色。胶体金标记羊抗人IgM最低稳定量是1μg/ml，最适稳定量为1．5μg/ml。最适pH为8．2。血清标本检测结果与进口ELISA试剂盒比较差异无统计学意义。结论胶体金免疫层析试纸条制备质量不但与抗原抗体的质量、层析材料的选择、胶体金的制备与标记等因素密切相关，而且缓冲系统、辅助添加剂的选择与优化也非常重要。     

北京地区动物及蜱中新型布尼亚病毒携带状况的初步调查与分析

目的 调查北京地区鼠类、犬类以及蜱中携带新型布尼亚病毒的情况,探讨新型布尼亚病毒在自然界中可能存在的动物宿主及传播媒介,分析北京地区存在新型布尼亚病毒自然疫源地的可能性,以及该病毒的传播风险,为北京地区发热伴血小板减少综合征的防治提供背景数据及理论依据.方法 利用实时荧光RT-PCR方法检测2010年北京地区五个郊区县...     

化学发光法和实时荧光定量PCR法检验EB病毒的临床效果对比

目的 分析化学发光法和实时荧光定量PCR法检测肝癌患者血清中的EB病毒载量,探讨EB病毒在肝癌检测中的意义.方法 以化学发光法和实时荧光定量PCR对正常对照组、乙肝组、丙肝组及肝癌组患者血清中的EB病毒载量进行检测,并将两种检测结果进行对比分析.结果 化学发光检测肝癌组患者EB表达水平为1.99,均显著高于乙肝(1.25,u=5.129,P＜0.05)、丙肝(1.31,u =4.497,P＜0.05)、正常组(0.03,u=10.927,P＜0.05).实时荧光定量PCR方法检测肝癌组患者的EB表达水平为1.89,高于乙肝(1.26,u=5.295,P＜0.05)、丙肝(1.32,u=4.983,P＜0.05)及正常组(0.04,u=11.394,P＜0.05),差异具有统计学意义;肝癌患者术前EB表达水平(化学发光:1.87;实时荧光定量PCR:1.85)明显高于术后(化学发光:0.03,u=12.873,P＜0.05);实时荧光定量PCR:0.04,u =11.936,P＜0.05),差异具有统计学意义.两种检测方法结果无统计学差异(P＞0.05).结论 化学发光法和荧光定量PCR具有特异性强、灵敏度高等优点,可以用于检测肝癌的早期诊断和分期.     

江门成人散发急性腹泻者星状病毒的检测及毒株型别分析

目的研究江门地区成人腹泻者星状病毒感染情况及型别特点。方法收集江门地区病毒性腹泻流行期散发成人腹泻患者粪便标本，经胶体金法、RT-PCR法分别检测轮状病毒和诺如病毒后，运用实时荧光PCR进行星状病毒检测．并对阳性标本进行RT—nested PCR测序，鉴定型别。结果56份成人病毒性腹泻粪便标本中．荧光PCR法测出3份星状病毒株（5．4％），经RT—PCR测序1份，序列分析鉴定为HAtsV-4型。结论江门成人散发病毒性腹泻者存在星状病毒感染，型别为HAstV-4，未发现多致泻病毒混合感染。     

免疫层析法同时检测孕妇TORCH—IgM抗体的研究

目的建立一种免疫层析法用于同时检测孕妇血清中TORCH—IgM抗体。方法用胶体金标记羊抗人IgM（斗链）抗体，将巨细胞病毒（CMV）、风疹病毒（RV）、弓形体（Tox）、单纯疱疹病毒Ⅱ型（HSV-Ⅱ）四种重组抗原同时包被在硝酸纤维膜上，研制出同时检测TORCH—IgM抗体免疫层析试纸条。结果自制的免疫层析法与ELISA法对比检测阴阳性血清标本，各单项指标抗-CMV—IgM、抗-RV—IgM、抗-Tox—IgM、抗-HSV-Ⅱ-IgM阳性符合率分别为85．7％、100％、100％、100％，两法总符合率分别为97．9％、100％、100％、100％。结论本方法操作简便，显示结果直观，并且特异、稳定、快速、重复性好，可用于孕妇优生优育检测。     

Molecular and serological diagnosis of a dengue outbreak in Coro, Falcón state, Venezuela

Dengue virus (DV) is responsible for a spectrum of diseases, from a self-limited fever disease (DF, dengue fever) to the more severe forms of hemorrhagic fever/dengue shock syndrome (DHF/DSS). The aim of this study was the serological and molecular confirmation of an outbreak of dengue in Falcon state, Venezuela. A total of 54 sera from patients with clinical diagnosis of DV infection were analyzed by an enzyme immunoassays developed in Venezuela (ELISA -IgM e -IgG) and by PCR. From them, 78% exhibited DV infection (PCR+ y/o IgM+), 48% exhibited viremia by PCR and 57% were positive to IgM. An interesting observation was the high percent (76%) of patients with past or secondary infection (IgG positive), which included all the patients exhibiting clinical symptoms of DHF (n = 8). From the PCR positive sera, serotype 1 was found in 27%, serotype 2 in 54% and serotype 4 in 19%. No serotype 3 was found circulating in this population, although this serotype was already circulating in the nearby island of Aruba. The combination of serological and molecular methods allow us to obtain a fairly precise information of this outbreak.     

发热伴血小板减少综合征患者D-二聚体、心肌酶谱及肝酶谱的检测

目的 探讨本地区发热伴血小板减少综合征患者发热期、多器官功能障碍期、恢复期三期D-二聚体、心肌酶谱和肝酶谱的动态变化规律,研究其临床意义。方法 我院2011年3月~ 2015年12月收住院的124例发热伴血小板减少综合征患者回顾性分析。患者入院及后每2 d进行D-二聚体检测,早晨采空腹静脉血送检心肌酶谱、肝酶谱检测,至恢复期患者出院,记录各数据,进行统计学分析。结果 发热期D-二聚体水平（2231.4±158.6）μg/L、多器官障碍期D-二聚体水平（1520.5±106.7）μg/L,与恢复期D-二聚体水平（321.9±35.3）μg/L相比,发热期、多器官障碍期D-二聚体水平明显升高,差异有统计学差异（P<0.01）;多器官功能障碍期AST（183.1±67.1）U/L与发热期AST（372.9±90.0）U/L、恢复期AST（95.8±34.3）U/L对比明显升高,差异有统计学意义（P<0.05）;普通型AST水平（259.8±65.8）U/L低于危重型AST水平（428.6±140）,差异有统计学差异（P<0.05）;普通型LDH（305.4±132.0）U/L、CK（284.4±118.0）U/L、CK-MB（96.5±18.8）U/L与危重型LDH（3902.3±187.4）U/L、CK（799.8±437.3）U/L、CK-MB（206.1±51.4）U/L对比差异有统计学意义（P<0.01）,普通型ALT（96.66±42.16）、AST（156.1±37.1）与危重型ALT（372.9±61.6）、AST（651.8±34.3）比较差异显著,存在统计学差异（P<0.01）。结论 发热伴血小板减少综合征患者D-二聚体、心肌酶谱早期便出现异常改变,且病情越重,D-二聚体、心肌酶谱升高越明显,但肝酶谱的改变有一定的滞后性,早期检测D-二聚体、CK水平可以识别发热伴血小板减少综合征危重病例、D-二聚体、CK水平下降预示病情好转,可以指导预后。     

Evaluation of Commonly Used Serological Tests for Detection of Coxiella burnetii Antibodies in Well-Defined Acute and Follow-Up Sera

In this study, we compared Coxiella burnetii IgG phase I, IgG phase II, and IgM phase II detection among a commercially available enzyme-linked immunosorbent assay (ELISA) (Virion/Serion), an indirect fluorescent antibody test (IFAT) (Focus Diagnostics), and a complement fixation test (CFT) (Virion/Serion). For this, we used a unique collection of acute- and convalescent-phase sera from 126 patients with acute Q fever diagnosed by positive Coxiella burnetii PCR of blood. We were able to establish a reliable date of onset of disease, since DNA is detectable within 2 weeks after the start of symptoms. In acute samples, at t = 0, IFAT demonstrated IgM phase II antibodies in significantly more sera than did ELISA (31.8% versus 19.7%), although the portion of solitary IgM phase II was equal for IFAT and for ELISA (18.2% and 16.7%, respectively). Twelve months after the diagnosis of acute Q fever, 83.5% and 62.2% of the sera were still positive for IgM phase II with IFAT and ELISA, respectively. At 12 months IFAT IgG phase II showed the slowest decline. Therefore, definitive serological evidence of acute Q fever cannot be based on a single serum sample in areas of epidemicity and should involve measurement of both IgM and IgG antibodies in paired serum. Based on IgG phase II antibody detection in paired samples (at 0 and 3 months) from 62 patients, IFAT confirmed more cases than ELISA and CFT, but the differences were not statically significant (100% for IFAT, 95.2% for ELISA, and 96.8% for CFT). This study demonstrated that the three serological tests are equally effective in diagnosing acute Q fever within 3 months of start of symptoms. In follow-up sera, more IgG antibodies were detected by IFAT than by ELISA or CFT, making IFAT more suitable for prevaccination screening programs.     

固相酶联免疫测定法检测NS1抗原在登革病毒感染早期诊断中的应用

目的探讨固相酶联免疫测定（ELISA）法检测NS1抗原在登革病毒感染早期诊断中的应用价值。方法选取登革病毒感染早期患者血清171份,非登革病毒感染发热患者血清11份,正常人血清10份,采用ELISA法检测全部192份血清的登革病毒NS1抗原和IgM抗体;采用逆转录-聚合酶链反应-限制性内切酶酶切片段长度多态性分析（RT-PCR-RFLP）技术对发病5 d内的125份血清进行扩增和鉴定分型;并采用C6/36细胞微量培养法对发病第1、2天的41份血清进行登革病毒分离培养。结果登革病毒感染患者发病2 d内、3～5 d以及6～10 d血清NS1抗原的检出率分别是92.7%（38/41）、83.3%（70/84）、10.9%（5/46）;IgM抗体的检出率分别是2.4%（1/41）、51.2%（43/84）、97.8%（45/46）;非登革病毒感染的发热患者及正常人血清中,有1例疟疾患者血清登革病毒IgM抗体呈阳性,NS1抗原无一例阳性。RT-PCR在登革病毒感染患者发病第1、2天和3～5天的检出率分别是85.4%（35/41）、83.3%（70/84）;登革病毒感染患者发病第1、2天血清的病毒分离培养阳性率分别是80.0%（16/20）、38.1%（8/21）,总分离率58.5%（24/41）;RT-PCR-RFLP分型鉴定技术及间接免疫荧光法（IFA）均证实2006年广州流行株为登革Ⅰ型病毒。结论ELISA法检测登革病毒NS1抗原操作技术成熟,且具有敏感性高、特异性好的特点,对登革病毒感染的早期诊断和疫情的早期控制具有重要意义,适合于基层医疗机构常规应用。     

2006年广州地区登革热流行的临床特征

目的总结2006年6～12月间广州地区出现的439例登革热病人的临床特点。方法对2006年我院收治入院的439例登革热病人的临床症状、体征和实验室检查进行回顾性分析。结果2006年的登革热病例主要临床表现为发热（100%）、头痛（75.9%）、全身肌痛（56.7%）、骨痛（42.1%）、恶心呕吐（27.1%）、皮疹（92.9%）;白细胞及血小板减少分别占72.7%和64.7%,血液生化示丙氨酸转氨酶（ALT）升高占57.9%、天门冬氨酸转氨酶（AST）升高占85.2%、低钾血症占44.2%,淋巴结肿大占15.3%,肝肿大占1.4%,未见脾肿大。CD细胞亚群计数CD3下降的占44.5%、CD4下降的占46.2%,CD8下降的占38.7%。所有病例登革热抗体IgM阳性。结论此次广州地区流行的登革热病例,临床表现典型合并有多脏器损害,尤其肝损害较多见,近半数病人出现CD细胞计数明显下降,未出现登革出血热及登革休克综合征。经及时诊断和治疗,预后良好。     

四例咽拭子检测阳性发热伴血小板减少综合征重症患者的临床特征分析?

通过疑似发热伴血小板减少综合征（ Severe fever with thrombocytopenia syndrome, SFTS）病例咽拭子的新型布尼亚病毒（SFTSV）检出情况,探讨SFTSV通过呼吸道传播的可能性。按照国家卫生部颁发的《发热伴血小板减少综合征防治指南（2010版）》中疑似病例的纳入标准,于2013年5～9月在SFTS高发区河南信阳的监测哨点医院收集72例疑似 SFTS 病例的血清和咽拭子标本,采用实时 RT?PCR 方法和ELISA方法检测SFTSV。结果显示,在72例疑似SFTS病例中,52（72?2％）例检测是SFTSV阳性,其中46例核酸RT?PCR检测阳性,6例血清ELISA检测阳性。在52例SFTSV阳性病例中,4（7?7％）例咽拭子核酸检测SFTSV阳性;在20例SFTSV阴性病例中,咽拭子核酸均未检测到SFTSV。4例咽拭子SFTSV阳性病例均为重症,同时都伴有咳嗽症状,其病毒载量最高可达108 copies／mL。 SFTSV在患者的咽拭子中可以检测到,咽拭子核酸检测SFTSV阳性检出率远低于血清标本,其作为检测SFTSV的可行性值得商榷。咽拭子检测SFTSV阳性患者体内病毒载量高且伴有咳嗽症状,加大了SFTSV通过呼吸道传播的风险。     

Real-Time PCR with Serum Samples Is Indispensable for Early Diagnosis of Acute Q Fever

The world''s largest Q fever outbreak is ongoing in The Netherlands with around 3,000 confirmed cases since the first half of 2007. Increased awareness has resulted in early referral of patients for diagnostics. An important drawback to serological diagnosis of acute Q fever is the lag phase in antibody response. Therefore, we evaluated the performance of a real-time PCR for detection of Coxiella burnetii DNA using serum samples from patients with acute Q fever. PCR, targeting IS1111, was retrospectively performed on acute-phase and follow-up convalescent-phase serum samples from 65 patients with acute Q fever as diagnosed by immunofluorescence assay. The results obtained by PCR were related to disease stage as defined by subsequent appearance of phase II IgM, phase II IgG, phase I IgM, and phase I IgG (IgM-II, IgG-II, IgM-I, and IgG-I, respectively) antibodies and time since onset of disease. In addition, we analyzed seronegative acute-phase serum samples from patients with inconclusive Q fever serology, because no convalescent-phase serum samples were available. PCR was scored positive in 49/50 (98%) seronegative sera, 9/10 (90%) sera with isolated IgM-II antibodies, 3/13 (23%) sera with IgM-II/IgG-II antibodies, 2/41 (5%) sera with IgM-II/IgG-II/IgM-I antibodies, 0/15 (0%) sera with IgM-II/IgG-II/IgM-I/IgG-I antibodies, and 0/1 (0%) serum sample with IgM-II/IgG-II/IgG-I antibodies. The latest time point after onset of disease in which C. burnetii DNA could be detected was at day 17. In patients with inconclusive Q fever serology, PCR was positive in 5/50 (10%) cases. We conclude that real-time PCR with serum samples is indispensable for early diagnosis of acute Q fever. C. burnetii DNA becomes undetectable in serum as the serological response develops.Q fever, an infection caused by the bacterium Coxiella burnetii, results in a self-limiting disease in 40 to 50% of infected cases. Pneumonia is the predominant presenting symptom in acute Q fever, although fever and hepatitis are also frequently observed (9, 10). Failure to diagnose acute Q fever and delay in treatment may lead to prolonged morbidity and increased hospital admission rates (4, 7, 11, 14).During three consecutive years, large Q fever epidemics occurred in an area in the south of The Netherlands where the disease was formerly not prevalent (11). In 2007 there were a total of 191 confirmed cases reported, in 2008 a total of 998, and in 2009 more than 2,000 confirmed cases were reported, which ranks the outbreak as the largest Q fever epidemic recorded to date. The affected area has a large density of dairy goats, of which a number have tested positive for Q fever. Next to the differences in sizes of the epidemics, the interval between onset of disease and date of diagnosis decreased from a median of 77 days in 2007 to 29 days in 2008 and 17 days in 2009 (12). Moreover, the hospital admission rates were reduced from 40% in 2007 to 20% in 2008 (11). Both observations are most likely due to increased awareness among physicians in the affected area resulting in early submission of clinical samples to the laboratory, subsequent earlier diagnosis, and probably fewer undiagnosed cases. The majority of diagnostic samples from both epidemics were submitted to our laboratory, which lies in the center of the epidemic area and serves a catchment area of roughly 500,000 persons in a semirural district supporting two hospitals and surrounding general practitioners.The gold standard for serological diagnosis of an infectious disease is either a seroconversion or a 4-fold rise in antibody titer. The reference test for serological diagnosis of Q fever is the immunofluorescence assay (IFA) (8). Antibodies are expressed against phase II antigens during the acute infection and against phase I antigens in the established infection. For both antigens, IgM antibody production precedes IgG production, and thus three phases can be distinguished in acute Q fever: a seronegative phase followed by IgM/IgG phase II seroconversion during the acute infection and subsequent IgM/IgG phase I seroconversion in the established infection. However, an important drawback to serological diagnosis of acute Q fever is the lag phase in antibody response of 7 to 15 days after onset of clinical symptoms (8).Apart from serology, C. burnetii-specific PCR of serum samples can be an additional tool to diagnose Q fever in the early acute phase, but conflicting sensitivities have been reported (3, 13). Here, we evaluated the performance of an in-house-developed real-time PCR assay for detection of C. burnetii DNA in serum samples from patients with acute Q fever.     

多种蚊媒病毒x—TAG悬浮芯片复合检测方法的建立

建立多重检测东方马脑炎病毒、西方马脑炎病毒、委内瑞拉马脑炎病毒、基孔肯亚病毒、登革病毒、日本脑炎病毒、黄热病毒、西尼罗病毒、圣路易斯脑炎病毒、版纳病毒、布尼亚病毒、裂谷热病毒的悬浮芯片方法。将十二种蚊媒病毒分为3组,每组使用标记有不同anti—TAG的上游引物及标记有生物素的下游引物对分别构建多重PCR体系,PCR产物与偶联了x—TAG的编码磁性微球进行杂交,最后利用Bio—plex100分析系统对12种蚊媒病毒分别进行单一、多重液相芯片检测。将平均荧光强度的判定阈值定为背景对照的3倍,多批次实验均能对十二种单一病毒样本和混合病毒样本进行准确鉴定,未出现交叉反应,表明该方法特异性较好。敏感性测试结果显示本检测方法具有高灵敏度。通过利用偶联有TAG及生物素的引物对,成功建立了可同时检测12种蚊媒病毒的液相芯片检测技术平台。该平台对于病原体的检测具有较好的应用前景。