培训课件--猪繁殖系统的疾病.pptVIP

* Vaccinate sows twice a year. 4 times if want to eliminate from farm Respiratory Failure 呼吸症状 Sows and gilts 母猪和小母猪 depression 萎靡 lethargy 昏睡 anorexia 厌食 fever 发热 respiratory distress 呼吸困难 Reproductive Failure 繁殖障碍 Late-term abortions/farrowing early 晚期流产或早产 Increase in stillbirths, mummified fetuses, and weak newborns 死胎，木乃伊胎和弱仔数增加 Increased Preweaning Mortality断奶前仔猪死亡率增加 Weakborn pigs die within 24 hours 弱仔在产后24小时内死亡 Normal appearing pigs can develop difficulty in breathing 表现正常的仔猪可能发生呼吸困难 Can develop diarrhea 发生下痢 Death loss increases 死亡损失增加 Diagnosis of PRRS诊断 History of reproductive problems 生殖系统病史 abortions, stillborns, weak piglets 流产，死胎，弱仔 Increased preweaning mortality 断奶前的仔猪死亡率增加 Respiratory outbreaks 呼吸道病爆发 Diagnosis of PRRS诊断 Generalized increase in the size of lymph nodes 淋巴结普遍肿大 Pneumonic lesions in nursery pigs 保育仔猪发生肺炎病变 No specific necropsy lesions 无特异性剖检病变 Laboratory Diagnostics实验室诊断 Virus isolation 病毒分离 serum of weakborn pigs 弱仔的血清 tissues of sick pigs 病猪的组织 Serology 血清学 ELISA, SN, IFA, PCR Transmission of PRRS Virus病毒的传播 Pig to pig is most common method 猪只间直接传播最为普遍 introduction of infected shedding pigs 引进排毒的猪 stressed negative carrier pigs 受应激的阴性带毒猪 Airborne transmission 空气传播 Boar semen 公猪精液 Source of Viral Transmission传染源 Replacement breeding animals 后备种猪 Sows at farrowing 分娩母猪 Nursery pigs 保育期仔猪 Boars shedding intermittently 间断性排毒的公猪 PRRS Control 控制 Must stabilize the breeding herd 一定要稳定种猪群 vaccination 免疫接种 natural exposure 自然接触免疫 target replacement animals 注重后备猪的预防 close herd to replacement introductions Transmission from sow to piglet must be controlled 必须控制从母猪到仔猪的传播 PRRS Vaccine Use 疫苗的应用 Use to attempt to stabilize a herd produces variable results 用于稳定变异大的猪群 Use for introducing replacement animals into a positive herd 用于进入阳性猪群的后备种猪 Change needle often Vaccination Programs 免疫程序 There is no perfect vaccination program无完善的免疫程序 Numerous recommended protocols