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猪瘟及大肠杆菌都是猪场较为频繁的多发疾病,两者混合感染后其危害增强,给防治工作带来不小的难度,如不及时治疗常常导致大批猪只死亡,给养猪业造成巨大经济损失,严重影响生猪产业的发展。2013年笔者曾接诊一病例,通过临床及实验室确诊为猪瘟并发大肠杆菌感染,并采取了一系列控制措施,取得了良好的效果。 相似文献
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猪混合感染猪瘟和弓形体后,其临床表现与猪蓝耳病、附红细胞病的临床表现十分相似,容易引起误诊误治,延误最佳治疗时机,使养殖户蒙受不必要的经济损失。因此,在临床实践中,应该仔细进行区分诊治。笔者通过对一起典型的猪瘟和弓形体混合感染病例的诊治,分析得出猪瘟、弓形体混合感染的主要原因是饲养场环境差、抗生素应用不当以及猪感染猪瘟后机体抵抗力低下。对猪瘟、弓形体混合感染病的防治,以综合防制为主。 相似文献
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猪瘟与猪蓝耳病混合感染是导致生猪生长不良甚至造成猪只死亡的主要疾病之一,因此,养殖人员应加强对其预防与治疗.基于此,本文结合实际案例,对猪瘟与猪蓝耳病混合感染的临床症状、诊断方法、防控措施进行探讨,以供参考. 相似文献
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猪瘟是一种具有高度传染性的疫病,一直是威胁养猪业的主要传染病之一。沙门氏菌病也会对养殖业造成很大的损失,如果猪瘟病毒感染猪群继发感染沙门氏菌疾病,不仅对养猪业造成巨大的损失,还会影响养殖业的发展。2017年3月份对辽宁地区一中等规模猪场保育猪发生的疫情进行了诊断分析与检测,并根据检测结果和该场实际情况进行治疗,控制疫情。 相似文献
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2013年4月中旬,如皋市某镇某农户蔡某,从周边县市购进122头20kg左有的仔猪,由猪贩子分散购进,无任何免疫,无耳标,购进第3d开始发病,到笔者到场治疗时已经死亡8头,整群状态不佳。 相似文献
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陶玉顺 《山地农业生物学报》2006,25(4):367-369
2006年3月初,贵阳市某养殖场从广西引进80日龄(体重约为30~35kg)的商品猪60头进行饲养。该猪群在引进场后发现有2头猪开始发病,随后猪只陆续发病,共计发病48头,发病率为80%(48/60),死亡27头,死亡率为45%(27/60)。经本实验室诊断,确诊为猪瘟与仔猪副伤寒混合感染。现将诊断结果报告如下: 相似文献
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A multiplex real-time PCR assay for simultaneous detection of classical swine fever virus,African swine fever virus,and atypical porcine pestivirus 下载免费PDF全文
SONG Xiang-peng XIA Ying-ju XU Lu ZHAO Jun-jie WANG Zhen ZHAO Qi-zu LIU Ye-bing ZHANG Qian-yi WANG Qin 《农业科学学报》2023,22(2):559-567
With the implementation of the C-strain vaccine, classical swine fever (CSF) has been under control in China, which is currently in a chronic atypical epidemic situation. African swine fever (ASF) emerged in China in 2018 and spread quickly across the country. It is presently occurring sporadically due to the lack of commercial vaccines and farmers’ increased awareness of biosafety. Atypical porcine pestivirus (APPV) was first detected in Guangdong Province, China, in 2016, which mainly harms piglets and has a local epidemic situation in southern China. These three diseases have similar clinical symptoms in pig herds, which cause considerable losses to the pig industry. They are difficult to be distinguished only by clinical diagnosis. Therefore, developing an early and accurate simultaneous detection and differential diagnosis of the diseases induced by these viruses is essential. In this study, three pairs of specific primers and Taq-man probes were designed from highly conserved genomic regions of CSFV (5´ UTR), African swine fever virus (ASFV) (B646L), and APPV (5´ UTR), followed by the optimization of reaction conditions to establish a multiplex real-time PCR detection assay. The results showed that the method did not cross-react with other swine pathogens (porcine circovirus type 2 (PCV2), porcine reproductive and respiratory syndrome virus (PRRSV), foot-and-mouth disease virus (FMDV), pseudorabies virus (PRV), porcine parvovirus (PPV), and bovine viral diarrhea virus BVDV). The sensitivity results showed that CSFV, ASFV, and APPV could be detected as low as 1 copy mL–1; the repeatability results showed that the intra-assay and inter-assay coefficient of variation of ASFV, CSFV, and APPV was less than 1%. Twenty-two virus samples were detected by the multiplex real-time PCR, compared with national standard diagnostic and patented method assay for CSF (GB/T 27540–2011), ASF (GB/T 18648–2020), and APPV (CN108611442A), respectively. The sensitivity of this triple real-time PCR for CSFV, ASFV, and APPV was almost the same, and the compliance results were the same (100%). A total of 451 clinical samples were detected, and the results showed that the positive rates of CSFV, ASFV, and APPV were 0.22% (1/451), 1.3% (6/451), and 0% (0/451), respectively. This assay provides a valuale tool for rapid detection and accurate diagnosis of CSFV, ASFV, and APPV. 相似文献
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African swine fever(ASF) is an acute and highly contagious disease that causes severe economic losses to the swine industry. ASF is caused by infection of African swine fever virus(ASFV) in domestic pigs, leading to almost 100% mortality. However, no effective vaccines and pharmacologic treatment against ASF are available. ASF poses a severe threat to the swine industry and the economy. Here we summarize potential virus-host cell interaction mechanisms involving the suppression of innate and adaptive immune responses to ASFV entry and infection. These mechanisms include modulation of apoptosis, inhibition of inflammatory responses, reduction of IFN production, inhibition of autophagy, and suppression of MHC-I expression. Insights into immunoevasion strategies by ASFV may shed light on the development of vaccines, as well as preventive and therapeutic drugs. 相似文献
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重组白细胞介素-2对猪瘟疫苗免疫效果的影响 总被引:7,自引:0,他引:7
观察了重组IL-2对经产母猪和育成母猪猪瘟疫苗免疫效果的影响.结果表明,进行猪瘟免疫时应用重组IL-2,可以显著提高经产母猪和育成母猪猪瘟疫苗的抗体滴度水平及整齐度. 相似文献
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为观察猪瘟脾淋苗限断多种基因亚群带毒母猪垂直传播的效果.选择5个有代表性的规模化猪场为试验点,分别将3种猪瘟带毒母猪(Subgroup1l,Suhgroup2.2,Subgroup2.3 )随机分成试验组和对照组.试验组采用猪瘟脾淋苗2头份免疫,对照组采用猪瘟细胞苗4头份免疫.采用酶联免疫吸附试验检测带毒母猪所产仔猪的猪瘟抗原状况.接受猪瘟脾淋苗免疫的带毒母猪Subgroup2.1,Subgroup2.2和Subgroup2.3所产仔猪的抗原阳性率分别为20.75%,18.75%,20.93%.明显低于对照组母猪所产仔猪的抗原阳性率(51.02%,44.83%,48.78%)猪瘟脾淋苗免疫多种基因亚群带毒,母猪对阻断垂直传播有很好的效果. 相似文献
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猪瘟胶体金快速诊断试纸条的研制 总被引:4,自引:0,他引:4
采用柠檬酸钠还原法制备胶体颗粒,用猪瘟(CSF)抗体标记纯化,并包被在玻璃纤维膜上,另外将纯化的CSF抗体和羊抗鼠抗体包被在硝酸纤维膜上,组装成CSF快速检测条,对猪瘟病毒进行检测.结果表明:使用所研制的CSF快速检测条检测收集的70份待检样品,共检出猪瘟阳性病例26例,而经病毒分离鉴定阳性病例有28例,阳性符合率达92.8%;将5份阳性猪瘟病毒稀释后用试纸条和ELISA方法进行敏感性实验,结果表明,诊断试纸条的敏感性较高,用试纸条对鸽新城疫病毒、鸡减蛋综合症病毒、猪传染性胃肠炎病毒、猪繁殖与呼吸障碍综合症病毒进行检测,无交叉反应. 相似文献
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为了明确非洲猪瘟疫情发生后国内居民肉类消费结构的变动趋势,给后续制定和实施稳定生猪市场的政策提供依据,同时也能为以后研究其他动物疫病暴发后居民肉类消费行为变动提供一定参考。基于2015—2020年全国31个省(市、区)(除港澳台外)的面板数据,采用双重差分法从理论与实证两方面探究非洲猪瘟对居民肉类消费结构的影响,并运用调节效应模型对其作用机理进行验证。研究发现:第一,非洲猪瘟导致我国居民人均肉类消费总量下降明显,其中猪肉下降趋势最显著,禽肉作为猪肉的主要替代品消费量显著上升,虽然牛羊肉也起到了替代作用,但结果不显著。第二,非洲猪瘟对城乡居民肉类消费影响存在明显差异,农村居民与全国总体居民的消费变化方向一致,并且农村居民受非洲猪瘟影响更大;对城镇居民而言,非洲猪瘟也会降低其肉类总消费量和猪肉消费量,但并不显著,与农村居民不同的是禽肉与牛肉共同成为城镇居民选择的猪肉替代品。第三,居民可支配收入在非洲猪瘟对居民肉类总量与猪肉的消费影响中有显著调节作用,非洲猪瘟发生后可支配收入越低的省份,肉类总量与猪肉的消费下降越多。 相似文献
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对不同猪瘟抗体水平的6个试验组的24头猪及4头对照组猪用已建立的“ELISA间接法检测猪瘟抗体”法进行血清猪瘟抗体ELISA效价的测定,用石门系猪瘟强毒攻击受试猪测定保护力.研究结果表明,血清猪瘟抗体ELISA效价在1:30以上多数能够抵御猪瘟强毒的攻击.该临界线的确定为“ELISA间接法检测猪瘟抗体”技术在猪群免疫监测及防疫注射质量考核中的推广应用提供了依据. 相似文献
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猪瘟是一种常见病、多发病,临床发病较多,检测抗体仍然是实验室中常用的检测方法。为了验证微量间接炭凝集试验在监测猪抗体水平上的作用,我们进行了微量间接炭凝和间接血凝的对比试验。本试验采用炭凝抗原与血凝抗原,在U型板上检测待检血清。通过对比发现,微量间接炭凝集试验与在实践上推广应用的间接血凝有类似的效果,而微量间接炭凝集试验的抗原制作成本低廉,可以长期保存,经验证后有望在基层推广应用。 相似文献
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【目的】了解我国非洲猪瘟病毒(African swine fever virus,ASFV)的生物学特性及理化抗性,提高猪场生物安全水平以防控非洲猪瘟。【方法】通过红细胞吸附试验和qPCR试验验证不同理化因素(包括静置、温度、UVC照射、室内外干燥、阳光暴晒和消毒剂)对ASFV的灭活效果。【结果】UVC照射30 min即可灭活病毒,照射时间越长,ASFV核酸降解越严重;室内干燥2.5 d、室外干燥1.5 d、阳光暴晒30 min均可灭活ASFV,但不能降解ASFV核酸;常见消毒剂对ASFV的杀灭效果良好,各消毒剂按照推荐稀释浓度室温作用15或30 min,除碘酸混合溶液外均能使ASFV完全失活;温度升高(4、25和37℃)会增强消毒剂的消毒作用;有机物FBS的存在会削弱消毒剂的作用,且随FBS体积分数增加(0、10%和30%)消毒剂的消毒效果会降低。【结论】本文系统研究了常见的理化因素对ASFV灭活效果的影响,有助于全面了解ASFV生物学特性,对非洲猪瘟的防控具有重要指导意义。 相似文献