湖南省规模猪场主要疫病流行情况调查研究

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1、湖南农业大学硕士学位论文湖南省规模猪场主要疫病流行情况调查研究姓名：刘道新申请学位级别：硕士专业：养殖指导教师：刘毅;邱伯根20031001PR、PRRs存在部分交叉感染。不使用疫苗的田间血清样品的PRRs、PR的抗体阳性率也高。Hc与PRRs．PR、Chla、JE和PPV中的一种或几种混合感染可能是引起繁殖障碍造成严重损失的主要原因。3规模猪场HC、FMD、PR和PWMS隐性感染情况I陆床上无典型症状的健康猪场，猪群FMD、HC、PR和PWMS感染(未免疫)抗体阳性场数为45，45％，50％、67．64％和62．29％：猪群感染抗体平均阳性率

2、为7

3、2％，23．58％，29．16％和49．40％；PMws抗体阳性率最高为100％；关键词：规模猪场；疫病：调查：监测EpidemilogicalinVestigationofmaininf．ectiVediseaseonpigfarminHuNanproVinceAbstractThecasesof465pigf打mswerediagonosedby15rcagem—casea11dGeneralexalllinationme血od．AtⅡ1esametimel28990sharesse咖、santibodywercmonitoredwi

4、nlHC、PRRS、FMD、PPV、JF、Bme、Chla、IARS、1'oxoplasmosis．TheresultsareasfollowingsI、Thcspeciesandprevalentsitllationsofmain印idemicdiseaseonpigf细1hemainepidemicdiseasewaspropagateobstmctionandin南ctiousdisease，theinfectiveratesofbomwasrespectively54．77％aIld56．18％inHuNan．Theinfectionm

5、tcsofHC、FMDaIldporcinepasteurelloSiswererespectiVely47．7％、14．37％、5．75．Theinfectiveratesofepidemicdiseaseonpigf如ninChallgSha，Yueyatlg，Y0ngzhouaIIdXian酉angwere30．29％、13．59％aIld7．94％respectivelyThemcidcnceofadiseaseofIarge—scale加删、moderate—scaleandsmall—scalefhrnlwererespective

6、ly27．35％，44．12％arld28．53％．ThespeciesofepidemicdiseaseonIarge-ScaIefan叫waspropagateobs_【n工ction，butinfectiousdiseaseonmoderate．scaleandsmaU～scalef细．Thediseaseonmoderate—scaleandsmall—scalefanllwasmainlyHCandFMD．TheHRmfectionratesontwof缸mwererespectlVely52．94％，33．82％，也eFMDinfe

7、ctionratesontwofhrrn、№rerespec小旭ly69．23％a11d26．9％．Porcinepasteurellosisa11dPRoccurredchienyonlarge-scalef醯m．TheinfectionratesofPRonmreekindsoff撕nswerereSpectively51．06％，38．3％，10．64％II．ThecauseofpropagateobstmctiononswineThecauseofpropagateobstmctionwasPR、HC、PRRS、PPV、JEandchl

8、锄ydia，whichdidnot印pearsingleinfection．Theantigenwasmonitoredon305pigfhrmswhichhaVet11e帅icalsymptomofpropagateobstruction．Thea11tibodywasmeasuredwhichincluded6346sharessemmsampleand52698sharess锄p】eoffield．Thercsultrevealedt11atmeappearratesofantigenofHCwere6l、97％onpigfhrmwith

9、typicalsymptomofpmpagateobstnlction．Thepos“iveratesofa11仙odytoPRRs，PR，JE，ch