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为全面了解赤羽病在广西各地区牛和山羊中的流行和分布情况,试验采用酶联免疫吸附试验(ELISA)对2014年、2015年采集自广西全境14个市的1 428份山羊血清和983份牛血清进行AKAV抗体检测,并对地理、气候因素与AKAV感染分布情况的关系进行探究。结果表明:广西山羊和牛的总AKAV抗体阳性率分别为36.48%和63.89%,且各地区间存在差异。其中山羊AKAV抗体阳性率以梧州市最高,牛AKAV抗体阳性率以贺州市最高,分别为62.50%和87.50%。广西境内牛和山羊感染AKAV的分布情况受到纬度、气温和降雨量等地理、气候因素的影响,较高纬度的桂北地区的抗体阳性率低于较低纬度的桂南地区;气温和降雨量较高的地区的AKAV抗体阳性率均高于气温和降雨量较低的地区。说明广西境内各地区牛和山羊中均存在AKAV隐性感染,应根据其影响因素合理进行防控。 相似文献
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为了解四川省攀西地区山羊泰勒虫病流行情况,用双抗原夹心ELISA方法,对采自凉山彝族自治州和攀枝花市10个县/市的640份山羊血清样品进行检测。结果显示:攀西地区10个县/市羊泰勒虫血清抗体阳性率介于52.78%～100%,平均阳性率为73.44%(470/640);春季阳性率最高,秋季最低;经卡方检验,不同地区和季节的羊泰勒虫血清抗体阳性率差异均显著(χ~2=54.392,P 0.01和χ~2=38.157,P 0.01)。结果表明,攀西地区羊泰勒虫病流行较为严重,且流行呈现明显的地区和季节性特征。本研究为该地区羊泰勒虫病防控提供了流行病学参考数据。 相似文献
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马士孝 《上海畜牧兽医通讯》2020,(4)
为了解南京市高淳区山羊弓形虫病流行情况,采用弓形虫抗体ELISA检测试剂盒对该地区多个山羊养殖场的642份样品进行弓形虫抗体检测。结果显示:642份样品中,68份血清样品检测为阳性,总阳性率达10.59%;不同年龄阶段羊群弓形虫病阳性率有较大差异,成年羊的弓形虫病阳性率(14.49%)明显高于未成年羔羊(8.64%)。成年羊中,以配种公羊阳性率最高,达16.22%;哺乳母羊次之,为14.61%;妊娠与空怀母羊最低,为13.64%。羔羊中,以断奶母羔羊弓形虫阳性率最高,为9.30%,哺乳羔羊阳性率最低,为7.87%,但两者差异不显著(P0.05)。综上可知,南京市高淳区存在一定程度的山羊弓形虫感染,需采取相关防控措施。 相似文献
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为了探究云南部分地区反刍动物戊型肝炎病毒(HEV)血清流行病学特征,试验采用ELISA方法对收集的1 500只山羊和500头黄牛血清样本进行HEV抗体的检测,并对检测结果按不同地区、物种和年龄进行分析。结果表明:共有590份(29. 50%)血清样本被检测为HEV抗体阳性。不同地区反刍动物血清HEV阳性率不同,红河地区最高,为55. 00%;丽江地区最低,为19. 48%。不同物种动物血清阳性率不同,黄牛血清HEV阳性率为44. 00%,山羊血清HEV阳性率为24. 67%。不同年龄山羊抗体阳性率不同,成年山羊组( 1岁)血清HEV抗体阳性率为32. 29%,幼年山羊组(≤1岁)血清抗体阳性率为11. 11%,差异极显著(P 0. 01)。说明云南地区反刍动物种类、年龄和饲养地区是影响反刍动物HEV抗体阳性率的主要因素,应采取有效措施来防控家畜戊型肝炎的传播感染。 相似文献
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2010～2013年吉林部分地区羊布氏杆菌病流行病学调查 总被引：1，自引：0，他引：1
为了了解2010~2013年吉林省西部地区羊布氏杆菌病流行状况,本实验采用虎红平板凝集试验方法对吉林省三个羊主要养殖区域(包括白城,双辽和长岭),两个主要养殖群体,绵羊及山羊进行了布氏杆菌抗体监测。结果显示2010~2013年期间吉林省羊布氏杆菌血清阳性率从10%以上降低至5%左右,以白城,双辽为代表的西部草原地区感染率高于中部农牧区,但差异并不显著。不同品种间感染率比较发现绵羊感染率显著高于山羊。尽管本检测结果提示吉林主要养殖地区布氏杆菌病得到了有效控制,但血清阳性率仍远高于国家控制区标准范围,提示吉林省部分地区羊布氏杆菌病防控形势依然严峻。 相似文献
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为了解湖南省羊弓形虫病流行情况,2017年采用间接血凝试验(IHA),对邵阳、常德、湘潭、岳阳、株洲、郴州、张家界、娄底等8个地区进行山羊弓形虫血清学调查。结果显示:共采集的5 600份羊血清中,检出弓形虫血清抗体阳性468份,样品阳性率为8.36%,其中2017年上半年阳性率为8.75%,下半年为7.96%,无明显季节性差异(P 0.05);在抽检的216个场户中,检出阳性场户102个,场群阳性率为47.22%,其中散养户的场阳性率与样品阳性率(分别为64.61%、12.04%)高于规模场(分别为39.73%、7.14%),差异显著(P 0.05);1岁以上成年羊(10.77%)和1～6月龄(9.28%)幼年羊的样品阳性率明显高于7～12月龄的青年羊(5.93%),差异极显著(P 0.01);8个地区的样品阳性率有差异,其中邵阳市最高(10.00%),常德市最低(6.42%)。调查结果表明,弓形虫感染在湖南省羊群中较为普遍,各地区羊群中均存在不同程度的感染,因此湖南省应注意加强弓形虫监测与防控,尤其是散养和1岁以上成年羊群,以确保公共卫生安全。 相似文献
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为了解吉林省羊附红细胞体病的流行情况,试验以羊附红细胞体26.0 ku抗原蛋白为诊断抗原,采用ELISA方法对吉林省的乾安、延吉、珲春、龙井4个县市的296份放牧绵羊的血清样本进行了羊附红细胞体抗体的检测。结果表明:在检测的296份血清样本中,以平原为主的乾安县羊附红细胞体抗体的阳性率为40.2%(53/132),以山区为主的延吉、珲春、龙井市羊附红细胞体抗体的阳性率分别为60.9%(39/64)、62.5%(25/40)、61.7%(37/60),平原与山区羊附红细胞体抗体阳性率差异极显著(P<0.01);羔羊与成年羊附红细胞体抗体阳性率差异极显著(P<0.01)。说明吉林省是羊附红细胞体病的流行地区,尤其在山区感染严重。 相似文献
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为了解贵州省山羊流产与山羊痘的相关性,采用琼脂扩散试验和PCR法对本省10个市(县)流产羊群的血清和病料样本进行山羊痘抗原抗体及病原核酸检测,同时血清进行布氏杆菌抗体检测,流产胎儿病料进行羊流产亲衣原体病原核酸检测。结果发现山羊痘羊群流产率达37.1%(4329/11660),山羊痘血清抗体阳性率为38.2%(34/89),抗原阳性率为72.7%(32/44),流产胎儿山羊痘病毒核酸检出率为83.3%(10/12),发病羊群未检出布氏杆菌和羊流产亲衣原体感染。结果表明,山羊流产与山羊痘感染有一定关系,提示在山羊养殖中应加强饲养管理,防止山羊痘感染引起孕羊流产。 相似文献
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Czopowicz M Kaba J Szaluś-Jordanow O Nowicki M Witkowski L Frymus T 《Polish journal of veterinary sciences》2010,13(4):709-711
Investigation into herd-level seroprevalence of caprine herpesvirus type 1 (CpHV-1) and bluetongue virus (BTV) was conducted in 2007 in Poland. It involved the entire population of goats covered by a milk recording program in 2007, which included 49 goat herds. The number of goats examined in each herd was determined statistically in order to detect the presence of at least one seropositive animal in a herd with a 95% probability and simple random method of sampling was applied. No antibodies to CpHV-1 or BTV were detected. Further calculations were carried out to determine the herd-level true seroprevalence, taking into account sensitivity and specificity of the test as well as several other factors. It can be concluded that till the middle of 2007 population of Polish goats covered by the milk recording program remained negative with respect to CpHV-1 and BTV. 相似文献
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《Research in veterinary science》2012,92(3):e163-e168
The Toggenburg orbivirus (TOV), a recently discovered virus related to bluetongue virus (BTV), has been identified in goats in Switzerland, Italy and Germany. Isolation of TOV in vitro has not yet been achieved and the transmission mechanisms are still unknown. In the experimental infection of pregnant goats described here, TOV could not be detected in secretion/excretion samples or fetal blood. Material from the goat experiment was used as inoculum for propagating the virus in vitro. To enhance the infectivity of TOV several modified protocols, e.g. pretreatment of the virus with trypsin, polyethylene glycol-mediated infection and lipofection were applied. Isolation of TOV, attempts to infect Culicoides nubeculosus by feeding TOV-positive blood and intracerebral inoculation of newborn mice were unsuccessful. The results of these studies suggest that TOV requires specific but different factors than other BTVs for infection and replication outside of its natural caprine host. 相似文献
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Planzer J Kaufmann C Worwa G Gavier-Widén D Hofmann MA Chaignat V Thür B 《Research in veterinary science》2011,91(3):e163-e168
The Toggenburg orbivirus (TOV), a recently discovered virus related to bluetongue virus (BTV), has been identified in goats in Switzerland, Italy and Germany. Isolation of TOV in vitro has not yet been achieved and the transmission mechanisms are still unknown. In the experimental infection of pregnant goats described here, TOV could not be detected in secretion/excretion samples or fetal blood. Material from the goat experiment was used as inoculum for propagating the virus in vitro. To enhance the infectivity of TOV several modified protocols, e.g. pretreatment of the virus with trypsin, polyethylene glycol-mediated infection and lipofection were applied. Isolation of TOV, attempts to infect Culicoides nubeculosus by feeding TOV-positive blood and intracerebral inoculation of newborn mice were unsuccessful. The results of these studies suggest that TOV requires specific but different factors than other BTVs for infection and replication outside of its natural caprine host. 相似文献
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B. Mondal A. Sen K. Chand S. K. Biswas A. De K. K. Rajak S. Chakravarti 《Tropical animal health and production》2009,41(8):1661-1667
A mixed infection with peste des petits ruminants virus (PPRV) and bluetongue virus (BTV) occurred in goats which exhibited symptoms characteristic of PPR. A number of samples were collected from ailing or dead goats for labrotory diagnosis. Antibody to BTV and PPRV was detected in sera samples by competitive ELISA. No PPRV antigen was detected in tissue samples like lung and spleen, however, presence of PPRV antigen in some sera samples was confirmed by sandwich ELISA. All the blood samples collected from the ailing animals were found positive for BTV antigen by a sandwich ELISA. BTV- and PPRV nucleic acids were amplified from the pooled blood and tissue samples respectively by RT-PCR assays. The identity of the amplicons was confirmed by cloning and sequencing. All these tests confirm that the goats were infected with PPRV and BTV simultaneously. Isolation of viruses from the clinical samples is underway. 相似文献
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B I Osburn B McGowan B Heron E Loomis R Bushnell J Stott W Utterback 《American journal of veterinary research》1981,42(5):884-887
Heparinized blood and serum samples were obtained from 1,295 ruminants in herds or flocks with bluetongue virus (BTV) infection in 4 western states. Submissions were from herds or flocks with clinical bluetongue (BT), as well as from animals on premises with no history of BT disease. Insects, including Culicoides variipennis, were collected in areas enzootic for BT disease. Viral isolations were in 10-day-old embryonating chicken eggs that were then adapted to Vero cells for serotyping. Sera were tested from group-specific antibody to BTV by the micro agar gel precipitin (AGP) test. Viral isolations were from cattle (81), sheep (122), goats (9), antelope (2), and C varipennis (5). There were 7 isolates of serotype 120, 114 of serotype 11, 42 of serotype 13, and 56 of serotype 17. In herds or flocks from which BTV was isolated, 51% of cattle, 56% of sheep, 21% of goats, and 52% of antelope had AGP antibodies. Virus was isolated from 43% of the cattle and 23% of the sheep that had no demonstrable evidence of AGP antibodies. Viral isolations were seasonal, occurring from August until December. Approximately 30% of the herds or flocks from which virus was isolated had more than one serotype of virus causing infection. 相似文献
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C.A. Batten M.R. Henstock H.M. Steedman S. Waddington L. Edwards C.A.L. Oura 《Veterinary microbiology》2013
The aim of this study was to assess the pathogenicity and infection kinetics of Bluetongue virus serotype 26 (BTV-26) in goats. Out of a group of six goats housed in insect free accommodation, five were experimentally infected with BTV-26 and one was kept uninfected as an in-contact control. Samples taken throughout the study were used to determine the kinetics of infection using a pan specific BTV real time RT-PCR assay and a group specific ELISA. The five infected goats did not show clinical signs of BTV, however high levels of viral RNA were detected and virus was isolated from the blood of all 5 goats. Antibodies against BTV were first detected between 7 and 11 dpi in all 5 experimentally infected goats. Interestingly at 21 dpi viral RNA was detected in, and virus was isolated from, the blood of the in-contact control goat, which also seroconverted. These results suggest that BTV-26 replicates to high levels in goats, causing no obvious clinical disease, suggesting that goats may be the natural host for this virus. Preliminary evidence also indicates that BTV-26 may be spread by contact transmission between goats, however a more detailed study is required in order to confirm this observation. 相似文献
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Gerbier G Biteau-Coroller F Grillet C Parodi J Zientara S Baldet T Guis H Roger F 《The Veterinary record》2008,162(6):173-176
Since 1999, several serotypes of bluetongue virus (btv) have been isolated in the western part of the Mediterranean basin, and since 2000, Corsica has been exposed to three different serotypes: BTV serotype 2 in 2000, BTV serotype 4 (BTV-4) in 2003 and BTV serotype 16 in 2004. In 2000 there were no surveillance systems for bluetongue, but in 2003, active surveillance of the circulation of BTV and its vector Culicoides species, aided by a raised level of awareness in farmers and veterinarians, made it possible to study the introduction of BTV-4. The monitoring and analysis of the seroconversions of sentinel herds of goats, clinical signs and meteorological variables showed that the serotype had been present in the island since May that year, but clinical signs were first observed only in October. Moreover, the weather conditions and wind patterns were suitable for the transport of Culicoides species from Sardinia in May. These observations suggest that btv had been transported on air currents from a southern infected area, and that it could have spread without causing clinical signs of disease for a few months. 相似文献
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为了建立蓝舌病(BT)的血清学诊断方法,本研究利用原核表达的蓝舌病病毒(BTV)血清型12型VP7纯化蛋白免疫BALB/c小鼠,制备2株单克隆抗体(MAb),分别命名为BTV-2D10和BTV-4H7。IFA试验表明,2株MAb均能与BTV 24个血清型发生特异性反应,而与茨城病病毒(IBAV)、中山病病毒(CV)、赤羽病病毒(AKAV)、牛病毒性腹泻病毒(BVDV)、牛传染性鼻气管炎病毒(IBRV)、牛轮状病毒(BRV)、牛肠道病毒(BEV)、牛呼肠孤病毒(RV)及口蹄疫病毒(FMDV)无交叉反应,表明2株MAb均为BTV群特异性抗体。采用重组表达的VP7蛋白作为包被抗原建立的竞争ELISA方法证明,BTV-4H7 MAb对不同血清型BTV阳性血清具有良好的阻断效果,而对AKAV、IBAV、BRV和FMDV阳性血清无阻断作用。本研究建立的竞争ELISA方法与IDEXX公司的试剂盒检测包括65份已知背景血清和322份采自广西省的山羊血清样品,检测结果符合率分别达100%和98%。该竞争ELISA方法的建立为BTV抗体的监测提供了安全、快速、准确的技术手段。 相似文献