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1.
河南平顶山某猪场母猪出现较严重的流产和产死胎现象,且50日龄~70日龄仔猪出现神经症状,根据临床表现初步诊断为伪狂犬病。为排除猪繁殖与呼吸综合征和猪瘟,进行了实验室诊断。应用ELISA方法检测发病保育猪及母猪血清的伪狂犬病病毒野毒株gE抗体,并对发病仔猪病料进行了伪狂犬病病毒(PRV)、猪繁殖与呼吸综合征病毒(PRRSV)和猪瘟病毒(CSFV)的实时荧光定量PCR检测。结果显示,伪狂犬病病毒野毒抗体阳性,实时荧光定量PCR检测确定仔猪病料中PRV核酸阳性,PRRSV和CSFV核酸阴性。结合临床症状及实验室检测,确诊该猪场发生的是猪伪狂犬病。 相似文献
2.
Goldberg TL 《Preventive veterinary medicine》2003,61(1):59-70
I used phylogenetic analyses to reconstruct patterns of directional interspecific transmission during a pseudorabies virus outbreak in Illinois, USA, in 1989. Isolates were recovered from five species: cattle, sheep, goats, pigs, and raccoons (Procyon lotor). I generated DNA sequences for 16 isolates of pseudorabies virus at the glycoprotein C gene, from which I constructed phylogenetic trees. I then used these trees, in combination with parsimony-based analyses of character evolution, to infer the frequency and direction of interspecific transmission events. Comparing inferred frequencies and directions of transmission to null expectations based on 10,000 random trees indicated a significant excess of transmission events from pigs to pigs and a corresponding lack of transmission events from non-porcine species. These results are concordant with the know biology and natural history of pseudorabies virus, and they demonstrate that retrospective phylogeny reconstruction and analyses of character evolution can be used to investigate the transmission ecology of pathogens. 相似文献
3.
为了确诊贵州省某规模化猪场保育仔猪异常死亡原因,从怀孕母猪、产房母猪、后备母猪、种公猪、哺乳仔猪、保育仔猪6个猪群采集90份血清样本采用ELISA方法分别进行血清抗体检测,并对采集的90份血清样本和1份病死猪淋巴结组织采用荧光PCR方法进行病原学检测。结果:6个猪群综合的猪瘟病毒、猪蓝耳病病毒、伪狂犬病病毒g B蛋白、伪狂犬病病毒g E蛋白血清抗体阳性率分别为87.78%、70.00%、88.89%、4.44%;猪瘟病毒、猪蓝耳病病毒、伪狂犬病病毒病原核酸检测显示阴性,猪圆环病毒2型病原核酸检测淋巴结组织样本显示阳性。试验结果表明,引起该猪场保育仔猪死亡的原因为猪圆环病毒2型感染。同时,怀孕母猪群出现了伪狂犬病病毒g E蛋白抗体阳性,提示怀孕母猪群可能存在猪伪狂犬病野毒感染。 相似文献
4.
自2010年以来,伪狂犬病在国内外呈暴发和蔓延趋势。免疫后猪感染伪狂犬现象在欧美地区和中国多数省份都有报道,且有一定数量的死亡发生。伪狂犬病野毒感染的血清阳性率逐年上升,从2010年的7%左右上升到2014年的26%。同时中国东北、华北和山东一带还有不同程度的水貂、狐狸等毛皮动物感染发病的情况,通过血清学和分子生物学检测发现阳性带毒率高达30.6%～37.2%。另外,适应了毛皮动物的伪狂犬病病毒会引起毛皮动物迅速发病和较高的死亡率。为了更好地研究该病发生的原因并及时地制定防控措施,作者对目前伪狂犬病在国内外的流行情况、疫苗的使用种类和该病的检测方法等方面进行了综合、系统的概括,并总结了在毛皮动物上发病的特有现象,就该病如何在毛皮动物中进行有效的治疗和防控做出了具体的分析和展望。 相似文献
5.
Latency and reactivation of pseudorabies virus in swine was studied. Thirty-one pigs were assigned to 5 groups and were given 1 of 4 vaccines; 10 remained unvaccinated controls. All pigs were then challenge exposed with a sublethal dose of virulent pseudorabies virus. One hundred one days after challenge exposure, all pigs were treated with dexamethasone to reactivate the virus. Virus-positive tonsil and nasal mucus isolates were recovered from 29 of the 31 pigs over a 12-day period. Frequency and duration of virus-positivity were significantly (P less than 0.05) and consistently lower among vaccinated pigs than among the unvaccinated controls. It was concluded that vaccination before challenge exposure had little or no effect on the rate of establishment of virus latency, but that vaccination reduced shedding after subsequent reactivation of the virus. 相似文献
6.
目的:为了掌握规模化猪场伪狂犬病野毒感染情况,减少伪狂犬病所造成的经济损失,以及规模化猪场应当采取的有效防疫措施。方法:采用ELISA法对某规模化猪场7~12月份的经产母猪和后备猪进行伪狂犬病抗体检测。结果:该猪场的伪狂犬病阳性率为21.26%,是伪狂犬病野毒阳性场。结论:该猪场在检测出伪狂犬病抗体呈阳性后,采取了一系列措施,从而控制了疫情的发生。 相似文献
7.
Pseudorabies outbreak and spread both at home and abroad since 2010.It is reported that some vaccinated swine are infected with pseudorabies virus,even a certain amount of death happened in not only China but European and American area.From about 7% in 2010 to 26% in 2014,the prevalence of field strain pseudorabies virus(PRV) rose year by year.At the same time,in the Northeast and North China including Shangdong province,fur-bearing animals as mink and fox also were attacked by this virus with a high virus carried rate reaching 30.6% to 37.2%.In addition,the PRV adapt to fur-bearing animals would cause high incidence and mortality rates.In order to study the causes of the disease and develop the prevention and control measures in time,pseudorabies epidemical situation,test method,the use of vaccine were reviewed in this paper.What's more,the endemism of the mink was expounded,and gave analysis and prospects to prevention as well as treatment of this disease on fur-bearing animals. 相似文献
8.
为了构建口蹄疫与伪狂犬病二价基因工程疫苗株 ,将口蹄疫病毒 (FMDV) P1基因插入到伪狂犬病病毒 (PRV)通用载体 p Pg G- uni中 ,得到 PRV转移载体 p Pg G- P1。将转移载体与 Eco R 线性化后的 PRV弱毒疫苗株 TK- /g G- / lac Z 基因组 DNA共转染 PK- 15细胞 ,转染产物经多次空斑纯化和 PCR鉴定 ,获得了纯化的重组 PRV TK- /g G- / Pg G- P1,重组病毒基因组 DNA经酶切鉴定进一步表明 ,FMDV的 P1基因已成功地整合到 PRV弱毒疫苗株的基因组中。Western blot试验表明 ,FMDV P1基因在重组 PRV中得到表达。该研究为进一步研制口蹄疫与伪狂犬病二价基因工程疫苗奠定了坚实的基础 相似文献
9.
W F Hall R M Weigel A M Siegel J F Wiemers J R Lehman A C Taft J F Annelli 《Journal of the American Veterinary Medical Association》1991,198(11):1927-1931
Sera were collected from 6 large farrow-to-finish swine herds infected with pseudorabies virus (PRV) in Illinois. All herds were participating in the Large Herd Cleanup Study, a USDA-initiated project to evaluate the feasibility of eradicating pseudorabies from large farms (greater than 400 sows) by use of a combination of vaccination and management changes. Herd size ranged between 425 and 1,500 breeding females. Between April and July 1990, sera for measurement of PRV antibodies were obtained from 113 to 156 sows and 112 to 162 finishing pigs (body weight greater than 70 kg)/herd. Duplicate sera from 30 sows and 30 market-weight pigs/herd were obtained for measurement of serum antibodies to the following associated organisms: swine influenza virus, transmissible gastroenteritis virus, encephalomyocarditis virus, Actinobacillus pleuropneumoniae, Eperythrozoon suis, and 6 serovars of Leptospira interrogans. Prevalence of PRV antibodies attributable to field virus infection ranged between 53.8 and 100% for sows and between 0.7 and 97.3% for finishing pigs, as determined by the appropriate differential test for the vaccine being used on each farm. In only 1 herd, PRV seroprevalence was increased with higher sow parity. For associated infections, the risk of seropositivity attributable to PRV was not significant (for most infections) on all farms and varied among farms. Thus, pseudorabies did not appear, in general, to increase susceptibility to infection with other disease agents. 相似文献
10.
伪狂犬病分子生物学诊断方法研究进展 总被引：2，自引：0，他引：2
伪狂犬病是多种家畜和野生动物的一种重要传染病,猪为病毒的贮存宿主。该病一毒一旦感染动物则终生带毒呈潜伏感染状态,遇到外界应激则重新激活而向外界排毒,引起易感动物发病。为了加强进口检疫和优良种畜的推广,防止该病的传入,各国科技工作者根据常规的抗原抗体检测方法不能检测该病毒的潜伏感染情况,研制出各种检测伪狂犬病病毒核酸的分子生物学方法。本文就核酸探针杂交技术,常规ＰＣＲ、鉴别ＰＣＲ、鉴别与定量ＰＣＲ等 相似文献
11.
Comparison of a modified counterimmunoelectrophoresis test and a microimmunodiffusion test for detection of pseudorabies virus antibodies in porcine sera. 
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下载免费PDF全文 P P Williams M F Coria E C Pirtle G A Erickson 《Canadian journal of veterinary research》1984,48(1):92-96
The correlation of a modified counterimmunoelectrophoresis (CIE) test and a microimmunodiffusion test for detecting pseudorabies virus antibodies in porcine sera was investigated, using as reference a standard virus neutralization test. The counterimmunoelectrophoresis test exhibited a sensitivity comparable to the microimmunodiffusion test but was not as sensitive as the virus neutralization test. The best feature of the modified counterimmunoelectrophoresis test is that it is a rapid test. It provides an alternative to currently used diagnostic tests for detection of pseudorabies virus antibodies in sera from field reared and experimentally reared swine exposed to pseudorabies virus. 相似文献
12.
伪狂犬病病毒（PRV）是α疱疹病毒属的一个成员，为伪狂犬病的病原，猪是伪狂犬病病毒的自然宿主，该病原一旦感染猪，则产生潜伏感染，其致死率随猪年龄的增加而降低。由于伪狂犬病的暴发引起畜牧业的巨大经济损失，许多国家都进行免疫接种预防该病，而该病在不同的国家地区危害不同，所造成的经济损失也不一样，另外各国的经济发展不平衡，因此对该病所采取的防制策略亦有所不同，文章综述了美国，日本，欧共体及其成员国之间对伪狂犬病采取的防制策略及取得的进展，并根据我国伪狂犬病的流行现状，提出了应采取的控制策略。 相似文献
13.
E C Pirtle 《Canadian journal of veterinary research》1982,46(2):128-129
Sera from butcher swine (1,246 total) were evaluated qualitatively by the microimmunodiffusion test and quantitatively by the virus neutralization test for antibody to pseudorabies virus. Ten percent of the sera had antibody to pseudorabies virus. Follow-up contact with veterinarians whose clients included the farms from which the positive swine originated revealed that few feeder swine are vaccinated against pseudorabies and that most infections with pseudorabies virus are subclinical. 相似文献
14.
To determine the sites of replication and the evolution of pseudorabies virus infection in boar genital organs, 5 Belgian Landrace boars were inoculated with pseudorabies virus unilaterally in the cavum vaginale of the testis. Virus replication took place only in cells of the tunica vaginalis of both cava vaginalia. Infection of the serosa led to exudative periorchitis and increased scrotal fluid, resulting in a severely swollen scrotal region. These experimental findings were similar to findings in boars with naturally acquired pseudorabies virus infection. Scrotal fluid contained large amounts of virus, making it a useful specimen for diagnosis of the disease in affected boars. 相似文献
15.
The effect of KLP-602 (active substance: lysozyme dimer) on the replication of two animal viruses: the TK900 strain of Aujeszky's disease virus and the Roakin strain of the Newcastle disease virus were investigated. The maximal tolerable dose of the drug was determined for two cell cultures (CECC and GMK) and the effect of the medicine on the titre range of infectious viruses and their adsorption was assayed. The direct impact of KLP-602 on the viral strains used was also determined. And finally the replication dynamics of viruses in the presence of KLP-602 preparation was estimated. KLP-602 showed no direct effect on either the viruses applied in the study or their adsorption. The drug, introduced into the culture 24 hours before its infection, did not affect the replication of the pseudorabies virus, but decreased the titre of the Newcastle disease virus. KLP-602 introduced simultaneously with the infection considerably lowered the final titres of both viruses. The medicine had the greatest inhibitory effect on the replication dynamics of both types of viruses in the CECC and of the pseudorabies virus in the GMK culture upon the maximal tolerable concentrations of drug and low infectious doses of viruses applied. 相似文献
16.
17.
K P Flaming F Blecha P J Fedorka-Cray G A Anderson 《American journal of veterinary research》1989,50(10):1653-1657
Pseudorabies is a porcine herpesvirus of major importance in the swine industry. Isoprinosine is an immunomodulating drug that has been shown to be beneficial in treating herpesvirus infections. Twenty-four 7-week-old pigs were allotted within litters to 1 of 4 groups: control, isoprinosine (ISO), pseudorabies virus (PRV), or isoprinosine and pseudorabies virus (ISO-PRV). Isoprinosine was administered daily for 16 days to the ISO and ISO-PRV groups (75 mg/kg of body weight/day, PO). Immunity in pigs in the PRV and ISO-PRV groups was challenged with pseudorabies virus (10(5) TCID50 units) on day 4. Rectal temperatures and viral excretion were monitored daily; total and differential leukocyte counts, lymphocyte response to mitogens, and interleukin-2 production were monitored every 4 days. Pigs challenge-inoculated with pseudorabies virus became ill, with the ISO-PRV group most severely affected. Rectal temperatures were high (P less than 0.05) in virally challenged pigs on days 5 to 12 and 14 to 16; isoprinosine did not alter this effect. Pseudorabies virus-infected pigs had leukocytosis (P less than 0.05) on days 12 and 16, primarily caused by neutrophilia. Concanavalin A-stimulated lymphocyte proliferation was decreased (P less than 0.06) in both PRV and ISO-PRV groups on day 12, compared with control pigs, but only in the PRV group on day 16. Pokeweed mitogen-stimulated lymphocyte proliferation was decreased (P less than 0.02) in ISO-PRV pigs on day 8 of the experiment. Interleukin-2 concentrations, pooled over all sampling days, were decreased (P less than 0.03) in pseudorabies virus-infected pigs. Viral excretion was not altered by isoprinosine treatment. These data suggest that pseudorabies virus infection decreased lymphocyte proliferative responses and interleukin-2 production in pigs, and that isoprinosine did not mitigate these effects. 相似文献
18.
Isoelectric focusing of infectious particles of porcine pseudorabies virus strains in granulated dextran gels. 总被引：1，自引：1，他引：0 下载免费PDF全文
下载免费PDF全文 Isoelectric focusing of infectious particles of four strains of porcine pseudorabies viruses (Indiana, Iowa, Shope and an avirulent live-virus vaccine strains) are described. The pseudorabies virus strains exhibited great mobility in the electric field typical of viruses of the herpes group. Strains were considered electrophoretically homogeneous based on their respective isoelectric points. Maximal virus infectivity was concentrated in reproducible, stationary zones representing 73 to 86% of the total virus infectivity initially applied throughout the gels. All pseudorabies virus strains during processing and after isoelectric focusing retained their ability as whole complete particles to typically infect porcine kidney cell cultures. Virus from gel fractions produces foci in cell cultures that specifically reacted with pseudorabies virus fluorescent antibody conjugate. Prevention of foci could be demonstrated by neutralizing with pseudorabies virus monospecific antiserum. Maximal infectivity titers were demonstrated to be directly related to isoelectric points. Strain differences, in relation to virulence in swine, apparently is not related to isoelectric points. 相似文献
19.
R E Larsen R E Shope A D Leman H J Kurtz 《American journal of veterinary research》1980,41(5):733-739
Two groups of adult boars were inoculated with a field strain of pseudorabies virus (PRV) by intranasal droplet; one group was given 5 x 10(5) median tissue culture infective doses (TCID50), and the other, 5 x 10(6) TCID50. (A third group was maintained as controls.) Ejaculates were examined twice a week for volume, sperm numbers, sperm morphology, and presence of PRV. Severe clinical disease with fever followed administration of the larger virus dose. Death (one boar), testicular degeneration, and transient elevation in spermatozoa with proximal cytoplasmic droplets were seen in different members of this group. The smaller dose resulted in seroconversion, but did not produce signs of disease. In this group, volume, sperm numbers, and sperm morphology did not decline when compared with base-line values or data of control animals. The virus was not isolated from semen. Effects of PRV infection on semen quality in boars seem to be related to the associated clinical signs of systemic disease. 相似文献
20.
为了确诊1例疑似绵羊伪狂犬病病例,本试验以上海郊区某羊场发病绵羊的病料为研究对象进行了病理学观察、病毒分离和鉴定。病理组织学变化显示,发病羊大脑组织神经元发生广泛性变性、坏死并伴有嗜神经现象,神经元周围出现胶质细胞增生。病料接种BHK-21细胞,细胞出现病变,间接免疫荧光试验和荧光定量PCR检测结果证实所分离的病毒为伪狂犬病病毒。流行病学调查结果表明,绵羊伪狂犬病可能是由猪伪狂犬病病毒感染引起的。通过免疫接种猪伪狂犬病弱毒疫苗,绵羊伪狂犬病疫情得到及时控制。 相似文献