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1.
Mari OKAMOTO Keisuke OGUMA Nanako YAMASHITA-KAWANISHI Toshihiro ICHIJO Shinichi HATAMA Maiko ENDO Maya ISHIKAWA Takeshi HAGA 《The Journal of veterinary medical science / the Japanese Society of Veterinary Science》2020,82(11):1607
Bovine foamy virus (BFV) is distributed through worldwide cattle herds. Although the biological features of BFV are not well understood, appearance of clinical manifestation by superinfection with other microorganisms is inferred. In Japan, reports of genomic characterizations and epidemiology of this virus are limited. In this study, we performed whole genomic sequencing of BFV strains Ibaraki and No.43, which were isolated in this country. Additionally, we investigated BFV in geographically distant four daily farms in Japan, to estimate the distribution of BFV and its correlation to bovine leukemia virus (BLV). BFV was distributed throughout Japan; the average positive rate was 12.7%. The nucleotide sequence identities of the isolates were 99.6% when compared with BFV strain isolated in the USA. The phylogenetic tree using env gene sequence showed strains Ibaraki, No.43 and Kagoshima were sorted in the same cluster including the USA and Chinese strains, while Hokkaido strain was in the other cluster including European strains. Although no clear correlation between BFV and BLV could be found, BFV and BLV infections were likely to increase with ages. Our data on epidemiology and characteristics of BFV will provide important information to reveal biological features of BFV. 相似文献
2.
R Peshev L Christensen L Christova 《Comparative immunology, microbiology and infectious diseases》1998,21(4):247-255
Eight Bulgarian bovine herpes viruses, two Hungarian herpes viruses 1A, 3A, calves isolate named Mramor, buffalo isolate 723 and two referents BHV 1 strains were investigated by restrictase fragment pattern analysis. Migration profile of viral DNA by using different restrictase enzymes Hpa I, BamH I and Hind III were compared. Clearly differences among two Hungarian strains, calves isolate Mramor, buffalo isolate 723 and 8 Bulgarian and two referents BHV 1 strain was observed. The strain Sartze was determined as a genital type BHV 1, whereas Ozet, Tch.voda, Slivnitza, B. Budinov, Ptcelarovo, Vrana and Podgumer as a respiratory type. Hungarian strains 1A, 3A, calves isolate Mramor and buffalo isolate 723 had similar migration profile as swine herpes viruses. Hybridisation between the K 22 fragment and 8 bovine herpes viruses after Southern blotting were observed. That is evidence for genetic relation of these strains. Such hybridisation with Hungarian 1A, 3A, Mramor and buffaloes 723 strains were not observed. This fact allowed us to conclude that these strains are genetically different from BHV 1.
Résumé
On a examiné par l'analyse de la restrictase huit souches bulgares de virus herpès bovins, deux souches hongroises de virus herpès (1A et 3A), l'une isolée d'un buffle 723, l'autre isolée d'un veau nommé ‘Mramor’ et deux souches de virus de référence BHVI. Le profil migratoire des virus a été comparé à l'aide d'enzymes restrictase Hpa I, BamH I, Hind III. Une nette différence a été constatée entre les deux souches hongroises, la souche isolée du veau ‘Mramor’, celle isolée du buffle 723 et les huit souches bulgares. La souche Sartze a été déterminéee comme type génital, alors que Ozet, Tch.voda, Slivnitza, B. Budinov, Ptcelarovo, Vrana, Podgumer sont des types respiratoires. Le deux virus hongrois 1A et 3A, la souche isolée du veau ‘Mramor’, et celle isolée du buffle 723 ont un profil migratoire comparable à celui des virus herpès du porc. Après Soutchern blotting, une hybridation entre fragment K 22 et les huit virus herpès bovins a été constatée. Il y a une liaison génétique entre ces souches. Il n'y a pas d'hybridation entre les souches hongroises 1A et 3A, celle isolée du veau Mramor et celle isoléee du buffle 723. Cette observation nous permet de conclure que les souches sont génétiquement différentes de BHV 1. 相似文献
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为了掌握湟中县牦牛病毒性腹泻病原的流行现状,对湟中县内11个乡镇的138份腹泻牦牛粪便样品进行了牛病毒性腹泻病毒(BVDV)、牛肠道病毒(BEV)、牛轮状病毒(BRV)、牛冠状病毒(BCV)和牛星状病毒(BAstV) 5种病毒性腹泻致病原进行检测与分析。结果:BVDV、BEV、BRV、BCV和BAstV的平均感染率分别为44. 93%、21. 74%、8. 70%、5. 07%和6. 52%,5种病原中BVDV和BEV在所有乡镇均有流行,BRV、BCV、BAstV在部分乡镇呈散发性流行; 5种病原在1～6月龄犊牦牛中的检出率明显高于6月龄以上成年牦牛。138份腹泻牦牛中存在BVDV、BEV、BRV、BCV、BAstV的单独感染和混合感染,总单感率为53. 62%;共存在10种混感型,总混感率为15. 22%。表明湟中县牦牛存在BVDV、BEV、BRV、BCV和BAstV的感染,且混合感染情况复杂,应引起高度重视。 相似文献
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本试验使用3~6月龄健康易感牛9头(牛传染性鼻气管炎病毒(IBRV)和牛病毒性腹泻病毒(BVDV)抗原、抗体均阴性),共分3组,每组3头犊牛。第1组首免肌肉注射IBRV-LNM弱毒疫苗株种毒,接种1周后,每头牛接种BVDV-SM弱毒疫苗株;第2组只接种BVDV-SM弱毒疫苗株种毒,接种时间同第1组;第3组为对照组,接种MDBK细胞培养液。接种BVDV-SM疫苗毒后每周采血至疫苗毒接种后28 d,测定接种后BVDV抗体效价,并采用BVDV-JL检验用强毒进行攻毒试验。结果表明,第1组与第2组试验动物血清中牛病毒性腹泻病毒抗体水平无明显差异,能够抵抗BVDV-JL强毒攻击达到免疫保护的效果,说明牛传染性鼻气管炎病毒IBRV-LNM弱毒疫苗株接种后在牛体内对牛病毒性腹泻病毒BVDV-SM疫苗毒不产生免疫干扰作用。 相似文献
5.
Dung Thi LE Son Vu NGUYEN Mari OKAMOTO Nanako YAMASHITA-KAWANISHI Tung Duy DAO Vuong Nghia BUI Haruko OGAWA Kunitoshi IMAI Takeshi HAGA 《The Journal of veterinary medical science / the Japanese Society of Veterinary Science》2021,83(8):1273
The detection of bovine foamy virus (BFV) in Vietnamese cattle was performed using conventional PCR targeting pol and gag genes. Out of 243 tested samples, ten (4.1%) and eight (3.3%) samples were positive for BFV gag and pol DNA, respectively. The prevalence of bovine leukemia virus (BLV) estimated by detection of proviral DNA using nested PCR targeting env gene was 26.7% (65/243). The results of nucleotide sequence alignment and the phylogenetic analysis suggested that Vietnamese BFV strains showed high homology to isolates belonging to either European or non-European clades. There was no significant correlation between BLV and BFV. This study provides information regarding BFV infection and confirms the existence of two BFV clades among Vietnamese cattle for the first time. 相似文献
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利用多重荧光定量RT-PCR （real-time RT-PCR）方法,提高对多病原检测的速度和灵敏度,促进对犊牛腹泻的快速诊断和及时治疗。分别在牛星状病毒（BAstV）ORF2基因,牛病毒性腹泻病毒1型（BVDV-1）5'端非编码区,牛冠状病毒（BCV）N pro基因和牛轮状病毒（BRV）VP6基因的保守基因序列设计、合成并试验筛选了四对有效的特异性引物和探针。进一步利用含4种病毒目的片段的重组质粒,对引物和探针的浓度以及反应条件进行了优化,建立了Real-time RT-PCR标准曲线,并对四重Real-time PCR方法的特异性、敏感性、重复性和各种临床样本的适用性进行了评价。结果显示：Real-time RT-PCR最适退火温度和时间分别为50.0℃和45 s,BAstV、BVDV-1、BCV和BRV的引物浓度分别为300、300、400和500 nmol·L-1,探针浓度分别为250、150、100和300 nmol·L-1。对BVDV-1、BCV和BRV的最低检测限均为102copies·μL-1,对BAstV的最低检测限为103 copies·μL-1,具有良好的特异性和重复性。该方法对临床采集的粪样的阳性检出率高于PCR方法。上述结果表明,建立的四重Real-time RT-PCR方法可以用于犊牛腹泻常见病原BAstV、BVDV-1、BCV和BRV的快速鉴别诊断。 相似文献
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Sera from 9 dairy herds with epizootic enteritis (winter dysentery) were examined for antibodies to bovine coronavirus (BCV) and bovine virus diarrhoea virus (BVDV). Cows in 8 of the 9 herds seroconverted to BCV alone, while the animals in the ninth herd, which showed severe symptoms of the disease, seroconverted both to BCV and BVDV. The BCV antibodies, which were present in high titres 1 year postinfection, were transferred to the offspring via the colostrum and were then detectable in sera of calves until these were approximately 5 months old. A serological survey of 549 Swedish heifers showed that 61% of the animals were reactors to BCV. The prevalence of seroreactors to BCV was equally distributed over Sweden but was commonly either high or low in herds. In conclusion, BCV is commonly detected in animals suffering from winter dysentery. A co-infection with BVDV appears to aggravate the disease. 相似文献
9.
根椐GenBank中牛病毒性腹泻病毒(bovine viral diarrhea virus,BVDV)、牛呼吸道合胞体病毒(bovine respiratory syncytial virus,BRSV)和牛副流感病毒3型(bovine parainfluenza virus type 3,BPIV-3)3种病毒基因序列,设计合成引物,建立3种病毒的三重RT-PCR方法。用这3对引物对同一样品中的BVDV、BRSV和BPIV-3核酸模板进行三重RT-PCR扩增,结果显示:可同时扩增BVDV的466 bp,BRSV的735 bp和BPIV-3的258 bp的特异性片段,而对其他4种病原的PCR扩增结果均为阴性;敏感性测定结果表明,该三重RT-PCR技术能检出10 pg的BVDV、1 pg的BPIV-3和10 pg的BRSV模板。用37份临床病料对本研究多重RT-PCR技术和单项RT-PCR技术进行对比验证,结果显示:两者的总符合率为100%。结果表明:建立的多重RT-PCR检测方法,具有特异、快速、准确的特点,可用于对这3种病毒的同时检测和鉴别诊断。 相似文献
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牛呼吸道疾病（bovine respiratory disease,BRD）是引起舍饲牛发病和死亡的主要原因,给北美和世界养牛业造成巨大的经济损失。BRD是由多种病毒、细菌与外界环境相互作用,如应激、环境因素与多种病毒、细菌和支原体等而引起的一种严重的呼吸系统疾病。作者就引起BRD的常见和严重的病原牛传染性鼻气管炎病毒（infectious bovine rhinotracheitis virus,IBRV）和牛呼吸道合胞体病毒（bovine respiratory syncytial virus,BRSV）的生物学特性、细胞感染和致病机制等进行简要概述,以期为该病的防制和研究提供参考。 相似文献
11.
Asuka Kumagai Kyoko Kawauchi Kiyohiko Andoh Shinichi Hatama 《Journal of veterinary diagnostic investigation》2021,33(1):162
Bovine respiratory syncytial virus (BRSV) is an etiologic agent of bovine respiratory disease. The rapid evolutionary rate of BRSV contributes to genetic and antigenic heterogeneity of field strains and causes occasional vaccine failure. We conducted molecular epidemiologic characterization of BRSV circulating in Japan to obtain genetic information for vaccine-based disease control. Phylogenetic analysis of G and F gene sequences revealed that all of the isolated Japanese BRSV strains clustered in the same genetic subgroup, which was distinct from the 9 known groups. We assigned the Japanese group to subgenotype X. The Japanese isolates formed 2 temporal clusters: isolates from 2003 to 2005 clustered in lineage A; isolates from 2017 to 2019 formed lineage B. The alignment of the deduced amino acid sequences of the G gene revealed that the central hydrophobic region responsible for viral antigenicity is conserved in all of the isolates; unique amino acid mutations were found mainly in mucin-like regions. Our results suggest that BRSV has evolved uniquely in Japan to form the new subgenotype X; the antigenic homogeneity of the viruses within this group is inferred. 相似文献
12.
为了检测牛呼吸道合胞体病毒(BRSV),根据已发表的融合蛋白(F)基因序列,设计了套式RT-PCR引物,初步建立了BRSV的套式RT-PCR检测方法。对138份牛鼻腔棉拭子进行了检测,结果检测到了BRSV阳性样品54份,总的阳性检出率为39.1%。对大部分BRSV阳性样品的F基因扩增产物进行了序列测定与分析。用该套式RT-PCR对牛传染性鼻气管炎病毒、牛副流感病毒3型、牛病毒性腹泻病毒等进行了检测,结果无交叉反应,表明该检测方法具有良好的特异性。本研究首次用套式RT-PCR技术证实了我国部分省的牛群中存在BRSV感染。 相似文献
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The objective of this study was to investigate the epidemic of three viral diarrhea diseases of yaks in northwest Sichuan province and provide certain scientific basis for controlling this kind of disease. 1070 yak serum samples from 8 counties of Aba state in northwest Sichuan province were detected by enzyme-linked immunosorbent assay (ELISA) to investigate prevalence of BVDV, BCV and BRV. The results showed that the average positive rates of BVDV, BCV and BRV antibody were 44.3%, 84.1% and 94.4%, respectively. The BVDV, BCV and BRV of yaks were widespread in northwest Sichuan province, further comprehensive prevention and control measures of viral diarrhea diseases should be strengthened in this region. 相似文献
14.
牛传染性鼻气管炎病毒攻毒方式的对比研究 总被引：2，自引：1，他引：1
本试验旨在建立牛传染性鼻气管炎病毒的攻毒模型,明确病毒在牛体内的分布及确定最佳攻毒方式,建立牛传染性鼻气管炎的发病标准,用来评价IBRV LNM弱毒疫苗的保护效力。试验共使用健康断乳牛9头,设鼻内喷雾组、滴鼻组和对照共3组,每组3头牛。将实验室分离保存的IBRV LN01/08强毒株采用鼻内喷雾和滴鼻两种方式接种试验组动物后,连续14 d,每日观察临床症状,监测体温及采集鼻拭子,对收集的试验数据进行对比分析。选取临床发病不同时期剖杀动物,采取主要脏器进行病毒分离。结果显示,所有动物攻毒后有不同程度的临床表现,以鼻内喷雾组临床表现最为严重,剖检可见肺部病变明显。病毒主要分布在呼吸道和眼结膜组织中。研究结果显示,采用IBRV自然感染方式攻击动物,喷雾方法攻毒临床效果明显强于滴鼻方式,保证了临床发病模型的建立,可以用来IBRV疫苗免疫效果评价,为研制IBR疫苗提供前提基础。 相似文献
15.
二重RT-PCR同时检测VSV与BVDV核酸 总被引：9，自引：0，他引：9
水泡性口炎病毒(VSV)与牛病毒性腹泻病毒(BVDV)具有相近的传播途径与类似的检测方法，本文参照文献报道的基因序列，设计合成了两对能分别扩增VSV(202bp)、BVDV(341bp)基因片段的引物，并对PCR扩增条件进行优化，建立了二重RT-PCR方法，可同时检测VSV与BVDV病毒核酸。VSV产物经测序显示与报道的核酸序列同源性为88．6％。二重RT-PCR同时检测VSV与BVDV经济、快速、敏感、特异，可用于实验研究和流行病学调查。 相似文献
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牛传染性鼻气管炎诊断方法研究进展 总被引：2，自引：0，他引：2
进行牛传染性鼻气管炎分子流行病学调查时,首先通过临床症状观察进行初诊,然后再进行实验室确诊。目前实验室诊断主要包括病原学诊断和血清学诊断。病原学诊断方法包括包涵体检查、病毒分离和病毒核酸检测;血清学诊断方法包括中和试验、琼脂扩散试验、间接血凝试验、酶联免疫吸附试验和变态反应。有时还要进行鉴别诊断,鉴别诊断主要有单克隆抗体法、鉴别PCR等。牛传染性鼻气管炎在世界范围内流行,给全球的养牛业造成了很大的影响。论文综述了牛传染性鼻气管炎诊断方法研究进展,为预防和消除该病提供参考。 相似文献
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鉴别牛病毒性腹泻病毒和猪瘟病毒的复合PCR方法及其应用 总被引：6，自引：0，他引：6
以牛病毒性腹泻病毒 (BVDV)特异引物 P1/ P3扩增 BVDV标准毒株及以猪瘟病毒 (HCV)特异引物 P2 / P3扩增HCV阳性病料 ,分别扩增出 32 6 bp和 2 5 2 bp的特异片段 ;以 P1、P2、P3扩增 BVDV和 HCV人工混合感染样品 ,扩增出大小为 32 6 bp和 2 5 2 bp的 2条片段 ,建立了特异的一步检测 BVDV和 HCV的复合 PCR方法。以建立的复合 PCR方法检测 BVDV分离株 ,都扩增出 1条 32 6 bp的特异片段 ;从吉林等地送检的病料和猪瘟兔化弱毒疫苗中扩增出一2 5 2 bp的特异片段 ,从长岭地区的疑似猪瘟病猪的血清病料中 ,同时扩增出 32 6 bp和 2 5 2 bp的核酸片段 ,表明长岭某猪场流行的“猪瘟”为 BVDV和 HCV混合感染。本研究为进行 HCV和 BVDV的鉴别诊断与流行病学调查提供了有效的方法。 相似文献
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BPIV-3和BVDV双重RT-PCR快速检测方法的建立 总被引：1，自引：0，他引：1
参照GenBank中登录的牛副流感病毒3型(BPIV-3)和牛病毒性腹泻病毒(BVDV)全基因序列,分别针对BPIV3特异性NP蛋白保守基因和BVDV保守区段E2基因设计2对引物,经优化反应条件建立了快速鉴别BPIV-3和BVDV的双重RT-PCR诊断方法。最佳扩增条件为94℃30s,56.2℃30s,72℃1min,循环30次;72℃延伸5min,16℃10min;BVDV引物浓度为1.0μmol/L,BPIV-3引物浓度为0.5μmol/L。采用该方法检测BPIV-3和BVDV参考病毒株,能同时扩增出预期为425bp和294bp大小的特异性片段,而扩增牛传染性鼻气管炎病毒、牛合胞体病毒、猪瘟病毒以及牛支原体、致病性大肠埃希菌、多杀性巴氏杆菌A型、化脓隐秘杆菌和鼠伤寒沙门菌等均呈阴性反应。对参考病毒株进行梯度稀释检测,结果证明该方法检测BPIV-3的灵敏度可达10-3 TCID50/0.1mL,而BVDV的灵敏度达102 TCID50/0.1mL。 相似文献
20.
牛病毒性腹泻病毒侵染细胞机制的研究进展 总被引：2，自引：0，他引：2
牛病毒性腹泻病毒(BVDV)是反刍动物和猪体内广泛存在的危害动物健康的重要病原体.BVDV感染牛后主要引起牛的持续性感染、免疫耐受、免疫抑制、繁殖障碍及急慢性黏膜病等临床症状,给养牛业造成重大的损失.其致病机理非常复杂,给该病的治疗和根除带来极大的困难.随着分子病毒学研究的发展以及对猪瘟病毒和黄病毒科其他成员的研究,人们在BVDV分子水平和细胞水平的研究方面也取得了一些进展.就此,作者从BVDV入侵细胞、在细胞内的复制以及与宿主蛋白分子相互作用等方面进行综述,有助于阐明BVDV致病和在体内持续存活的机制,为该病的防治和疫苗研发提供新的思路和对策. 相似文献