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ID:44574543
大小:195.41 KB
页数:6页
时间:2019-10-23
《猪场管理之猪群健康管理技术》由会员上传分享,免费在线阅读,更多相关内容在工程资料-天天文库。
1、SwineHealthManagementFactsheet猪群健康管理技术实录EIHJQ肉52治Id目(?hinii(an;KhIanSwinePiujeclGlassersDisease发性浆膜炎关节炎)Dr.JimFairies范如杰博士格莱西氏病(猪多HerdHealthSpecialist动物健康专家ChinaCanadaAnimalHealthInitiative中加动物健康启动项目Tel:010-64651512Fax:010-64651357E-mail电子信箱:iimjkvvet.comGlassersDiseaseiscausedbythebacterium
2、Haemophilusparasuis,asmallorganism,ofwhichthereareatleastfifteendifferenttypes.Itisubiquitous,foundthroughouttheworldandispresenteveninhighhealthherds.IfsuchherdsaresetupusingSPForMEWtechniquesandarefreefromHpsitcanbedevastatingwhentheyfirstbecomecontaminated,producingananthrax-1ikediseasewi
3、thhighmortalityinsows.SomeStreporganismsmaybeinvolvedaswell.?格莱西氏病是由一种称为猪副嗜血杆菌的细菌引起的。这种细菌至少有15种血清型,世界各地均有分布,即便在高度健康的猪群中也有存在。采用无特定病原(SPF)或用药物早期断奶(MEW)技术而没有猪副嗜血杆菌污染的猪群,如果感染到这种细菌的话,后果会相当严重,会爆发类似炭疽的疾病,在母猪群造成很高的死亡率。同时还会伴随一些链球菌的感染。Inthemajorityofherdsinwhichthebacteriumisendemic,sowsproduceastrong
4、matemalimmunitywhichnormallypersistsintheiroffspringuntil8to12weeksofageandasaresult,theeffectsoftheinfectioninweanersareusuallynilorveryminimal.Thepigsbecomesub-clinicallyinfectedwhenstillprotectedandthenstimulatetheirownimmuneresponse.Ifhoweverthematernalimmunitywearsoffbeforetheybecomeinf
5、ectedtheymaydevelopseveredisease.Itcanhoweverbecomeasecondaryorganismwherethereareothermajorpathogensandinparticularenzooticpneumonia.Outbreaksofdiseasearesometimesexperieneedinsuckingpigs,particularlyingiltherds.这种病菌在大部分猪群屮都是木地性的。母猪分娩时为新生仔猪提供了很强母源免疫,仔猪体内的母源抗体通常可以维持到8至12周龄。因此,这种病原对断奶阶段的仔猪影响不
6、人或没有影响。随母源抗体水平下降,仔猪仍然受到母源抗体-定程度的保护,此时会出现亚临床感染,仔猪自身的免疫应答反应将被激活,从而保证以后免得这种疾病。但是,如果仔猪在母源抗体完全消失Z后才感染到这种病原,就会出现严垂病情。这种细菌也会作为继发感染的病原伴随其它主要病原混合感染,尤其是有地方性猪肺炎存在时。这种病在哺乳仔猪群尤其是青年母猪中偶有爆发。Clinicalsigns临床症状Peracutedisease(Naiveherd)特急性病(未经病原感染群)Thediseasecreatesadevastatingacutemeningitis.Thisisnormallyse
7、enwhenanaiveadultisintroducedtoanormalherd.Within48hourstheadultdemonstrateseverepneumonia,depression,anorexia,highrectaltemperature42C.Terminallytheanimaldemonstratesincoordination,prostration,meningitisanddies.Deathcanoccurveryquicklyafterarrival
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