猪繁殖系统的疾病.ppt

猪繁殖系统的疾病.ppt

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ReproductiveDiseasesofSwine猪繁殖系统的疾病,危害猪繁殖系统的主要疾病Majordiseasesaffectingreproductioninswine,细小病毒病Parvovirus伪狂犬病Pseudorabies猪繁殖和呼吸综合征（蓝耳病）PRRS钩端螺旋体病Leptospirosis日本乙型脑炎JapaneseBEncephalitis猪瘟HogCholera流感Influenza布氏杆菌病Brucellosis,PorcineParvovirus猪细小病毒,Commoncauseofreproductivefailure繁殖障碍的常见病因Worldwideandinmostherds世界范围内多数猪群都有发生90-100%ofadultsarepositive成年猪90-100%为阳性。

ClinicalSigns临床症状,Dependsonstageofpregnancy怀孕的不同时期，症状不同70dayscanhavenoeffectonlitter70天以上感染-对将出生的仔猪无影响,SourceofTransmission传染源,Infectedsheddingfemales受感染的排毒母猪Contaminatedenvironment被污染的环境virusremainsinfectiousforupto4months病毒保持感染性可达4个月Resistanttomostdisinfectants对大多数消毒药有抵抗力Semenofinfectedboars受感染公猪的精液,DiagnosisofParvovirus诊断,Clinicalsigns临床症状increaseinfemalesreturningtoestrus再发情母猪的数量增加irregularestruscycles发情周期不规则failuretofarrow分娩障碍smalllitters窝产仔数少mummies木乃伊,LaboratoryDiagnosis实验室诊断,FAtestonmummies-besttest荧光抗体检测木乃伊最为有效Serology-prebreeedingandpostbreedingsamples血清学检测配种前和配种后取样检测Activeantibodytitersareveryhigh主动抗体的滴度极高Vaccinetitersaremuchlower疫苗引起的抗体滴度相当低,PreventionofParvovirus细小病毒病的预防,Vaccination疫苗接种vaccinategiltstwice30dayspriortobreeding配种前30天内给后备母猪接种2次疫苗revaccinateevery6months每6个月追加免疫1次vaccinateboarsevery6months每6个月给公猪免疫1次,PreventionofParvovirus细小病毒病的预防FeedbackProtocol回喂程序,ForPRRSnaveherds对于猪繁殖和呼吸综合征饲喂给敏感猪群TopromoteprotectionagainstTGE,enteroviruses,parvovirus,rotovirus,andE.coli可用于抵抗传染性胃肠炎、肠病毒、细小病毒、轮状病毒和大肠杆菌Feedbackprogram回喂程序atleast3weekspriortointroduction至少在引入主猪群前3周,FeedbackProtocol回喂程序,Retainviscerafromonestillbornpigandonenewlybornweakpigper10headofgilts每10个新母猪群保留一个死产仔猪和新生弱仔的内脏Collectallmummiesavailableonthatday收集分娩当天所有的木乃伊仔猪,FeedbackProtocol回喂程序,Collectcupofmanurefrombreedingherdpergilttobefedback从繁殖群每头新母猪收集半杯粪便以供回喂Mixmaterialinequalpartsofcoldwater将收集的粪便与同量冷水混合Feed500ml（2cups）pergilt,twiceperweekfor2weeksbeginninginlatedevelopment从发育期后期开始对每头新母猪喂二杯，每周喂二次，共喂二周,Pseudorabies伪狂犬病,Affectsonpigsdependsonageofpigs对猪的危害取决于猪龄大小Infectionreducesprofitabilityoffarm减少猪场利润Highlycontagiousdisease高度传染性疾病Spreadprimarilybypigtopigcontact主要以猪不同个体之间的接触而传播Domesticandwildanimalsaresusceptible家猪及野猪均易感,CauseofPseudorabies伪狂犬病的病因,Aherpesvirus一种疱疹病毒Virusdoesnotsurviveover2weeksinenvironment:

exceptincoldconditions病毒在环境中存活不超过2周，寒冷除外Drying,sunlight,andmostdisinfectantsdestroythevirus干燥，阳光和多数消毒药均能杀死病毒,TransmissionofVirus传播,Infectedfeederpigsandbreedingstock感染的架子猪和种猪Latencyproblems潜伏期问题Salivaandnasalsecretions唾液和鼻腔分泌物Abortedfetusesandinfectedpiglets流产的死胎和受感染的仔猪Aerosol,equipment,clothingandboots空气,设备,衣物和鞋,ClinicalSignsofPseudorabies伪狂犬病的临床症状,Agedependent取决于年龄Lessthan3weeksofage小于3周龄感染death死亡tremorsandincoordination振颤和共济失调paddlingandconvulsions四肢划船运动和痉挛,ClinicalSignsofPseudorabies伪狂犬病的临床症状,Post-weaningtomarketweightpigs断奶至上市之间的猪respiratorysigns:

coughingandsneezing呼吸道症状:

咳嗽和喷嚏anorexia,highfevers,laboredbreathing厌食,高热,呼吸困难tremorsandincoordination振颤和共济失调Theyoungerthepigwheninfected,thehigherthedeathloss猪龄越小，感染后死亡越高,ClinicalSignsofPseudorabies伪狂犬病的临床症状,Breedingherd种猪群canresultinrespiratorysigns引起呼吸道症状reproductivesigns生殖系统症状abortions,stillborns,weakpigs流产,死胎,弱仔returntoestrusandinfertility再发情和不孕,DiagnosisofPseudorabies伪狂犬病的诊断,Clinicalsignsthatareage-dependent年龄不同，临床症状表现也不同Pseudorabiesinthearea本地区的发生情况,LaboratoryDiagnosis实验室诊断,VirusIsolation病毒分离brain,tonsils,liver,spleen,lungs脑,扁桃体,肝,脾,肺Serologicaltesting血清学检测fluorescentantibodytest,serumneutralization,ELISA荧光抗体试验，血清中和试验，酶联免疫吸附试验takes7daysforantibodiestodevelop产生抗体需7天,TreatingPseudorabies伪狂犬病的治疗,Noeffectivetreatmentonceoutbreakhasoccurred一旦爆发，无有效治疗方法Isolateinfectedpigsoncediagnosed确诊后隔离感染猪Immediateimplementationofvaccinationmaylessenaffects马上免疫接种可减少损失,PreventingPseudorabies伪狂犬病的预防,Properisolationofreplacementsandtestingpriortointroductiontoherd适当隔离后备猪并在引入猪群前进行检测Vaccinatebreedingstock免疫种猪群Vaccinatepigsat8weeksofage对8周龄仔猪进行免疫接种Biosecurity生物安全措施,PRRS猪繁殖与呼吸综合征,Reproductivefailure生殖障碍Respiratoryproblems呼吸道病Worldwidediseaseproblem世界性问题Perhapsthemosteconomicallycostlydiseaseinswinetoday可能是当今养猪业损失最大的疾病之一,PRRSVirus猪繁殖与呼吸综合征病毒,Pigswithhigh-testresultscanstillbeactivelysheddingthevirus抗体强阳性的猪仍能活跃地排泄病毒NumerousstrainsofPRRSvirus有许多种病毒株Extremevariationinclinicalsignsonfarms猪场临床症状极其多变,RespiratoryFailure呼吸症状,Sowsandgilts母猪和小母猪depression萎靡lethargy昏睡anorexia厌食fever发热respiratorydistress呼吸困难,ReproductiveFailure繁殖障碍,Late-termabortions/farrowingearly晚期流产或早产Increaseinstillbirths,mummifiedfetuses,andweaknewborns死胎，木乃伊胎和弱仔数增加,IncreasedPreweaningMortality断奶前仔猪死亡率增加,Weakbornpigsdiewithin24hours弱仔在产后24小时内死亡Normalappearingpigscandevelopdifficultyinbreathing表现正常的仔猪