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时间:2020-05-14
《感染PRRSV Nsp2基因部分缺失变异株的仔猪抗体变化规律.pdf》由会员上传分享,免费在线阅读,更多相关内容在行业资料-天天文库。
1、●CT-JORICULTURAE华北农学报·2011,26(3):68—71¨髓ILl—SIHIGa感染PRRSVNsp2基因部分缺失变异株的仔猪抗体变化规律张风华,卢晓艳,徐红运,赵琳,刘玉松,范旭,夏平安,崔保安(河南农业大学牧医工程学院,河南郑州450002)摘要:为了解PRRSVNsp2基因缺失变异株的致病性,采用2个Nsp2基因分别连续缺失3个和89个碱基的PRRSV变异株Hn.2(GenBank:FJ237419)和Hn-4(GenBank:FJ237421)的病毒液,人工滴鼻感染断奶仔
2、猪,同时用Marc一145健康仔猪细胞培养液滴鼻作对照,在感染后0,7,14,24,32,41,50,60和70d无菌采血,分离血清,用RT—PCR方法检测病毒、用N.ELISA方法和免疫荧光抑制试验分别检测抗PRRSVN蛋白抗体和抗PRRSV中和抗体,比较分析不同时期病毒复制和抗体产生的变化规律。结果表明,仔猪感染Hn一2和Hn-4毒株后7~14d均能检测到病毒,第7天能检测到抗PRRSVN蛋白抗体,并一直维持较高水平,第4l和50天检测到较低水平的中和抗体,随后中和抗体效价逐渐升高。试验猪均未出
3、现死亡,表明PRRSVNsp2基因缺失变异株不一定导致感染猪的死亡。关键词:猪繁殖与呼吸综合征病毒;N蛋白;中和抗体;Nsp2基因中图分类号:$852.65;Q78文献标识码:A文章编号:1000—7091(2011)03—0068—04TheChangedRuleofInfectedPigletsbyaMutantofPorcineReproductiveandRespiratorySyndromeViruswithNsp2GeneDeletionZHANGFeng—hua.LUXiao—yan。
4、XUHong—yun,ZHA0Lin,LIUYu—song,FANXu。XIAPing—an,CUIBao—an(TheCollegeofAnimalHusbandryandVeterinary,HenanAgriculturalUniversity,Zhenzhou450002,China)Abstract:InordertounderstandthepathogenicityofPRRSVaboutNsp2genedeletionmutant,ThePRRSnegativehealthypigl
5、etsof20days—oldwereinoculatedbyintranasalwithaMutantofPRRSVHn一2(GenBank:FJ237419)andHn_4(GenBank:FJ237421)strainsrespectively,whichdelete3basepairsand89basepairsintheNsp2generespectively,whilehealthypigletswereusedforcontrol,theserawereseparatedaseptic
6、allyonthe0,7,l4,24,32,41,50,60,70drespectively,usingRT—PCRtodetectthevirus,usingELISAmethodandimmunofluo—reseeneeinhibitiontestfordetectionofanti-PRRSVNproteinantibodyandneutralizingantibodies,variationofthevirusandantibodywerecompariedindifferentperio
7、dsoftime.TheresultsshowedthatthePRRSVcouldbedetec-tedin7—14dafterinfectedwiththeMutantHn.2,andHn-4strain,anti—PRRSVNproteinantibodiescouldbedetectedonthe7thdayandhasmaintainedahighlevel,respectively,thelowlevelofneutralizingantibodiescouldbedetectedres
8、pectivelyon41dand50d,andtheneutralizationantibodyincreasedgradually.Thetestpigswerenotofdeath,indicatingthatthemutantPRRSVwithdeletedNsp2genedoesnotnecessarilyleadtopigdeath.Keywords:PRRSV;Nprotein;neutralizationantibody;Nsp2gene猪繁殖与呼吸综
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