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用SPF鸡胚从疑似鸽新城疫病鸽群中分离到1株病毒,该病毒株能凝集鸡红细胞,该凝集作用能被抗新城疫病毒阳性血清抑制。分离株经肌肉注射能使鸽发病和死亡,出现与自然发病鸽一致的症状和病变。收集发病鸽的病料再进行鸡胚增殖,又重新分离到此病毒。对该分离株进行理化特性研究,血凝素热稳定指数为10,病毒对氯仿、乙醚、胰蛋白酶、盐酸（pH5.0）敏感,0.1%甲醛溶液能完全灭活病毒。对该分离株进行毒力测定,鸡胚平均死亡时间为70.8h,1日龄雏鸡脑内接种致病指数1.60。结果表明,分离株为中等毒力鸽Ⅰ型副黏病毒。 相似文献
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鸽新城疫是由I型副黏病毒引起的一种高度接触性败血性传染病,能感染各种年龄和不同品种的鸽群,且受季节影响不大。病鸽是该病的主要传染源,病毒在病鸽体液和排泄物中含量最高。其传播途径除消化道、呼吸道、眼结膜、创伤和泌尿生殖道外,也可因接触含有鸽新城疫病毒的尘土、被污染的饲料及饮水、工作者所使用的带病毒用具等导致健康鸽感染发病。由于肉鸽养殖经济效益高,近年来我区肉鸽养殖越来越多,鸽新城疫也时常发生,现就一病例的诊治情况谈谈对该病的综合防控措施。 相似文献
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2010年5月,滨州某鸽场鸽群出现突然死亡,腿和翅麻痹瘫痪,头颈歪斜,呼吸困难,倒提病鸽有大量粘液从口中流出,拉稀等症状,发病率高达80％。经发病情况调查、临床症状、病理剖检及实验室检测,确诊为鸽新城疫并发大肠杆菌病。 相似文献
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Exotic Newcastle disease virus (NDV) isolated from chickens during the 2002-2003 California outbreak (CA exotic Newcastle disease [END] virus) was inoculated into 4-week-old specific-pathogen-free (SPF) White Leghorn chickens, 3-week-old SPF Beltsville White turkeys, 6-week-old commercial Broad Breasted White turkeys, and 10- to 20-week-old racing pigeons, and the clinicopathologic features of disease were compared. Birds were monitored clinically and euthanized sequentially with collection of tissues. Tissues were examined by histopathology, by immunohistochemistry to detect viral nucleoprotein, and by in situ hybridization to detect viral mRNA. Clinically, infected chickens and SPF turkeys showed severe depression, and all died or were euthanized because of severe clinical signs by day 5 postinoculation. In these birds, histologic lesions were widespread and virus was detected in multiple organs. All infected commercial turkeys showed mild depression, and incoordination was observed in some birds. Histologic lesions were mild, and viral distribution was limited. In pigeons, only 1 bird showed overt clinical disease, and histologic lesions and viral distribution were present in limited organs. Consequently, susceptibility to highly virulent NDV was shown to vary among chickens, SPF turkeys, commercial turkeys, and pigeons. Additionally, we have evidence of CA END virus subclinical infections that suggest pigeons could be subclinical carriers of other virulent NDV. 相似文献
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鸽新城疫病毒的分离及鸽群自然感染状况的调查 总被引：20，自引：3，他引：17
将在北京某信鸽群采集的两只具神经症状的病鸽脑组织悬液接种ＳＰＦ鸡胚后，分离出二株病毒分离物ＰＢ９６０１和ＰＢ９６０２，通过对鸡红血球的血球凝集试验，用已知鸡新城疫病毒（ＮＤＶ）高免血清任务在球凝集抑制试验（ＨＩ）及２～３月龄鸽的攻毒试验，证明这两个毒株为对鸽呈高致病性的ＮＤＶ。交叉ＨＩ试验表明，鸽ＮＤＶ分离株与鸡ＬａＳｏｔａ株间有很高的血清交叉反应，但也存在着一定抗原性差异。对扬州地区若鸽群中２－ 相似文献
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从发病商品肉鸽组织中分离到3株新城疫病毒,对其基因序列和感染力进行测定和分析。用RT-PCR对3株病毒F基因进行了扩增,测序,3株新城疫病毒的F基因同源性比较及进化分析结果表明,3株病毒均属于Ⅵb亚型,且与2011年比利时分离株亲缘关系较近,F蛋白裂解位点符合强毒特征;肉鸽攻毒试验进一步证实了3株新城疫病毒的高致病性,肉鸽感染新城疫病毒后通过呼吸道及消化道途径排毒,具有高度接触传染性。试验结果证明了鸽感染新城疫病毒后的排毒时间及方式,为鸽新城疫的及早发现与防控提供了依据。 相似文献
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To investigate the pathogens that racing pigeons in Taiwan are exposed to, a total of 3764 pigeons from 90 lofts were analysed by collection of blood samples in the period between October 2000 and September 2001. The haemagglutination inhibition (HI) test was performed to detect antibodies against Newcastle disease virus (NDV), type 2 avian paramyxovirus (APMV-2), and egg drop syndrome '76 virus (EDS-76V). The agar-gel precipitin (AGP) test was used to detect antibodies against fowl adenovirus (FAV), goose parvovirus (GPV), and avian reovirus (REO). The virus neutralisation (VN) test was applied to detect antibodies against the serotypes FAV-1 and FAV-8. A rapid serum agglutination test was applied for the detection of antibodies against Mycoplasma spp. Antibodies to several infectious agents were found, including NDV (43.3%), EDS-76V (19.2%), FAV (0.8%), REO (0.5%), APMV-2 (0.2%), Mycoplasma columbinum (10.3%), M. columborale (7.1%), M. synoviae (1.8%) and M. gallisepticum (1.3%). Antibodies against GPV, FAV-1, and FAV-8 were not detected in any serum sample. NDV seroprevalence was significantly higher in pigeons of more than one year of age than in pigeons younger than one year. ND or EDS-76 seroprevalence of pigeons vaccinated with ND vaccine or EDS-76 vaccine was significantly higher than that of pigeons that did not receive any vaccination. 相似文献
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Adriano O. T. Carrasco Meire C. Seki Ricardo L. M. de Sousa Tânia F. Raso Aramis A. Pinto 《Tropical animal health and production》2009,41(7):1325-1333
The purposes of this study were to model a vaccination regimen for Newcastle disease virus (NDV) in pigeons, and to evaluate
the susceptibility and behavior of vaccinated birds against a highly pathogenic NDV Brazilian strain. Antibody response was
assessed by means of hemagglutination inhibition test (HI), and viral genome excretion by means of RT-PCR. Vaccinal strains
(La Sota and Ulster) induced high antibody titers without any adverse effects, both in inoculated and in sentinel birds. A
viral strain pathogenic for chickens did not produce clinical signs of the disease in experimentally infected pigeons. Only
4 out of 10 vaccinated pigeons shed NDV genome, and just for two days. Results confirmed the high infectivity of the vaccinal
strains used, as all nonvaccinated pigeons showed antibody titers as high as those of vaccinated birds. 相似文献
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鸽新城疫病毒的分离鉴定 总被引：11，自引：0，他引：11
用SPF鸡胚从疑似鸽新城疫的信鸽饲养场分离到一株新城疫病毒。分离株利用电镜负染技术观察到典型的新城疫病毒粒子。生物学试验表明,该株病毒具有较强的毒力,最小致死量鸡胚平均致死时间（MDT）为68.4小时,1日龄雏鸡脑内接种致病指数（ICPI）为1.375,6周龄雏鸡静脉接种致病指数（IVPI）为1.34,在鸡胚成纤维细胞上能引起细胞病变。动物回归试验证明,分离株能致2月龄鸽死亡。 相似文献
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During an epornitic of velogenic viscerotropic Newcastle disease (VVND) in southern California, free-flying wild birds, captive and free-ranging semidomestic birds, and exotic birds were collected from the quarantine area to determine their role in the epizootiology of the disease. The VVND virus was isolated from 0.04% of 9,446 free-flying wild birds, 0.76% of 4,367 semidomestic birds, and 1.01% of 3,780 exotic birds examined. Three house sparrows and 1 crow directly associated with infected poultry flocks were the only free-flying wild birds from which VVND virus was isolated. Among semidomestic species, ducks, quail, chukars, pheasants, peafowl, pigeons, and doves were found to be infected. Psttacines, pittas, and toucans accounted for 92% of the VVND virus isolations from exotic birds. In addition, domestic Newcastle disease virus (NDV) was isolated from 0.29% of the free-flying wild birds, from 1.65% of the semidomestic birds, and from 0.19% of the exotic birds collected. Hemagglutination-inhibition against domestic NDV was demonstrated in 0.24% of 3,796 wild bird serums, 8.28% of 2,004 semidomestic bird serums, and 3.90% of 231 exotic bird serums tested. Although few free-flying wild birds were infected with VVND virus in this epornitic, the isolation of domestic NDV strains from free-flying wild ducks and mourning doves suggests the potential for transportation of NDV over long distances by migratory birds. 相似文献