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鸡胚气管环纤毛对不同类型AIBV毒株的敏感性 总被引：3，自引：0，他引：3
以鸡胚气管环纤毛运动作指示系统,应用鸡胚气管环组织培养不同血清型的７个标准ＡＩＢＶ毒株及５个不同致病型的分离毒株。采用５０ＣＤ５０病毒量ＩＢＶ毒株感染鸡胚气管环培养物,观察感染后不同时间气管环纤毛的存活率。结果表明,鸡胚气管环纤毛对不同血清类型的ＡＩＢＶ毒株敏感性各具特征。 相似文献
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本试验以气管环培养物为模型,以气管环纤毛运动为指征,测定了中药复方病菌净II在不同浓度、不同给药时间下对感染鸡传染性支气管炎病毒M41和Ma5的保护作用.结果表明,中药复方在250 mg.ml-1、125 mg.ml-1、12.5 mg.ml-1浓度下,对感染IBV-M41和IBV-Ma5的气管环的保护率分别是62.5%、33.32%、13.34%和86.67%、50%、22.5%.在感染IBV-M41和IBV-Ma5病毒前、同时、后给药病菌净II,对气管环的保护率分别是74.59%、22.5%、0和86.67%、25%、12.1%.研究结果提示,中药复方病菌净II在气管环培养模型上有抗鸡传染性支气管炎病毒的作用,不同给药浓度和不同给药方式影响其抗病毒作用. 相似文献
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吕化广 《中国预防兽医学报》1989,(4)
用不同种禽呼吸道病毒分别接种1～5日龄的鸡、火鸡、野鸡和鸭的气管环组织培养(TROC),以观察不同病毒对不同禽类气管上皮纤毛的作用。结果发现,临床上对某种呼吸道病毒易感的禽种,其 TROC 对此病毒也易感,表现为接种后3～4天,气管组织上皮纤毛停止摆动,进而脱落.因此,可通过 TROC 的方法对不同病毒感染的禽呼吸道疾病进行监测诊断.在本试验检测的316例鸡和火鸡的临床病料中,22例为 TROC 阳性(纤毛摆动停止).为区别禽传染性支气管炎病毒(IBV)与其它禽呼吸道病毒,将 TROC 阳性的病料再接种于9～12日龄鸡胚.5～6天后取其尿囊液,用血凝试验(HA)鉴别诊断。IBV 只有经酶激活后才凝集鸡红细胞.这22例中,13例为鸡新城疫病毒(NDV)感染,1例为 IBV 感染,此例经血凝集抑制试验(HI)和中和试验鉴定为 IBV-M41型其余8例不属于这两种病毒,尚待鉴定. 相似文献
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《中国兽医学报》2019,(9)
从山东某地疑似患肾型鸡传染性支气管炎(IB)的病死鸡的肝、肺、肾脏中分离到1株病毒,经过SPF鸡胚传代接种、血凝试验、鸡胚矮化试验、RT-PCR鉴定及测序分析、动物回归试验,确定为鸡传染性支气管炎病毒,并命名为SD/04/18株。结果显示,经3%胰蛋白酶处理后,病毒分离株有血凝性,未经处理病毒分离株不具有血凝性;鸡胚矮化试验发现该毒株明显抑制胚胎发育;进化树比对发现,该毒株与我国主要流行的QX株同源性最高,S1基因序列相似性为96.4%,氨基酸序列相似性为95.3%。分离株用SPF鸡胚连续传3代后接种8日龄SPF雏鸡,复制出了与自然病例相同的临床症状,肺、脾、肾、气管等器官出现典型病理变化。免疫组织化学法检测在气管环纤毛、肾小管上皮细胞间隙等部位可见抗原聚集。对被感染试验鸡的口腔、泄殖腔排毒进行跟踪检测,直到试验结束,被感染鸡仍有很高的病毒检出率。结果表明,最终确定该毒株为肾型鸡传染性支气管炎病毒。 相似文献
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可用于鸡胚接种的传染性支气管炎病毒疫苗近来,英国科研人员研究了采用重组传染性支气管炎病毒(IBV()表达Beaudette突出蛋白(Beau-R)的Beaudette株和M41毒株(BeauR-M41(S)))制备的疫苗接种18日龄鸡胚的应用效果,以期开发出可用于卵内接种的IBV商业疫苗。通过观察接种后的孵化率,雏鸡鼻渗出物的产生以及气管纤毛活性来了解这两种重组病毒的病原性。与商业化IBV疫苗相比,当采用卵内接种时,Beau-R和BeauR-M41(S)两个疫苗株都没有导致孵化率下降,并且雏鸡鼻内无渗出物排出,气管纤毛上皮仅出现轻微损伤。在一定剂量的M41株病毒攻击下,… 相似文献
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为比较滑液囊支原体(MS)和鸡传染性支气管炎病毒(IBV)共感染对SPF鸡的致病性,本研究将144只28日龄SPF鸡随机均分为阴性对照组、MS感染组、IBV-M41感染组、IBV-M41+MS共感染组、IBV-QX感染组、IBV-QX+MS共感染组共6组,采用50μL/只剂量按相应分组点眼感染MS (106CCU50)、IBV(105EID50),阴性对照组以50μL/只点眼KM2培养基(左眼)和PBS (右眼)。感染后每天观察临床症状,在感染后7 d、14 d、21 d和28 d每组随机剖检6只鸡,观察气囊炎和气囊损伤评分,并采集气管进行病原再分离,其中MS经支原体液体培养基培养后进行PCR鉴定,IBV接种SPF鸡胚后进行RT-PCR鉴定。此外,各组鸡气管均经10%甲醛固定后进行粘膜厚度检测以及病理损伤评分。结果显示：除阴性对照组和MS感染组,其他组鸡在感染后4 d均出现一过性呼吸道症状。剖检结果显示MS感染组鸡在感染后21 d出现气囊炎,28 d仍可见气囊炎;而IBV-M41感染组和IBV-QX感染组鸡在感染后7 d或14 d出现气囊炎,且气囊炎的发生率均未超过50%。感染后14 ... 相似文献
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为验证新兽药白虎定喘口服液的药效作用,进行了鸡传染性支气管炎病毒（infectious bronchitis virus,IBV）鸡胚增殖抑制试验、气管纤毛运动试验及SPF雏鸡人工感染IBV疗效试验。将试验药液与等量IBV液混合作用后,接种11日龄SPF鸡胚,37℃孵育168 h,取存活鸡胚肾脏进行IBV的RT-PCR检测,结果表明,药物组168 h鸡胚存活率为80%,阳性对照组为20%,两组间差异显著（P<0.05）;试验药物组RT-PCR检测无目的条带出现,而阳性对照组有目的条带出现。40日龄SPF鸡连续用药3 d后,气管内注入0.02 mL墨汁,测量1 min内墨汁移动的距离,结果表明药物组墨汁移动距离极显著大于生理盐水对照组（P<0.01）。17日龄SPF鸡用IBV-M41滴鼻,0.3 mL/只,24 h后开始灌服药液,1 mL/kg,连用5 d,结果表明,试验药物组与攻毒对照组在临床症状计分、痊愈率上均存在显著差异（P<0.05）;试验组气管黏膜组织切片未见明显病变,而阳性对照组有明显病理变化。以上试验结果表明,白虎定喘口服液对IBV具有较好的体外抑制作用,可显著促进气管纤毛的运动,对鸡传染性支气管炎（IB）具有较好的临床防制效果。 相似文献
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建立了H5N1亚型禽流感病毒（AIV）蚀斑克隆方法，用不加中性红的营养琼脂为覆盖层，在倒置显微镜下挑斑，对3株H5N1亚型AIV鸡胚分离毒株进行了蚀斑克隆纯化，从同一鸡胚分离毒株中纯化得到了蚀斑大小和形态均存在显著差异的毒株，共获得13株蚀斑克隆纯化株。研究结果表明，当小牛血清浓度为2%时，加入终浓度50 μg/ml的胰酶可明显促进和刺激蚀斑的形成，蚀斑的直径和PFU/ml均有显著的增加。通过TCID50、EID50和LD50测定发现，来自同一鸡胚分离株的不同蚀斑克隆纯化株中，蚀斑大、毒力强的克隆毒株占优势，而且蚀斑较大的，其毒力也较强。对得到的13株蚀斑克隆毒株的全基因组各片段序列分析表明，蚀斑克隆纯化株在HA蛋白裂解位点附近的氨基酸序列均符合高致病性通报性禽流感病毒的分子特征。 相似文献
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鸡传染性支气管炎病理形态学及发病机理的研究 总被引：5，自引：1，他引：4
１５０只１８日龄雏鸡随机分为两组，试验组９０只接种传染性支气管炎病毒（ＩＢＶ－Ｍ４１）后３５天内分３０批依次于不同时间扑杀，作组织病理学、超微结构及病毒抗原位检查，对照组６０只作相同的检查。结果表明，ＩＢＶ攻击的靶器官是气管，气管的病变表现为粘膜上皮细胞的损伤和脱、残留的在皮细胞增殖形成复层上皮、粘膜固有层及粘膜下层大量淋巴细胞浸润及粘膜逐渐恢复的相互连续的病理过程。肺脏初级、次级支气管也有类似的 相似文献
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Vaccination against infectious bronchitis (IB) is aimed to protect against clinical IB. The question is, however, whether vaccinated birds are also protected against predisposure for colibacillosis after a subsequent IBV infection. We examined this research question in four experiments. One-day-old commercial broilers, housed in isolators, were vaccinated with IB vaccine strain H120 by coarse spray or ocularly. Twenty-eight days after vaccination, broilers were challenged with the virulent IBV strain M41. Five days later, broilers were inoculated with Escherichia coli strain 506. Body weight uniformity, severity of E. coli airsacculitis, and systemic E. coli infection at 7 days following E. coli inoculation were used as parameters for colibacillosis. IBV vaccination reduced both the number of broilers with E. coli airsacculitis as well as the severity of airsacculitis significantly after challenge with IBV-M41 and E. coli 506. However, in spray-vaccinated groups, no significant reduction of the number of birds with systemic colibacillosis or the severity of this infection was obtained, and body weight uniformity was not significantly improved compared with nonvaccinated, IBV-M41, and E. coli 506-challenged groups. Eye-drop vaccination resulted in conflicting results. 相似文献
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ZHAO Zeng-cheng LIN Shu-qian HUANG Zhong-li LI Gui-ming YANG Shi-fa FENG Min-yan SONG Min-xun FU Jian LI Ying SHANG Jing 《中国畜牧兽医》2017,44(1):282-288
In order to verify the effect of Baihu Dingchuan oral liquid of new veterinary drugs,the effects of infectious bronchitis virus (IBV) on the proliferation inhibition test, tracheal cilia movement test and SPF chickens infected with IBV were tested.The test solution was mixed with an equal amount of IBV solution,inoculation of 11-day-old SPF chicken embryo,incubation at 37℃ for 168 h.RT-PCR was performed to detect IBV in kidney of live chick embryo.The results showed that the survival rate of 168 h chicken embryo was 80% in the drug group,but the positive control group was 20%, and there was significant difference between two groups (P<0.05). In the test drug group, no band was detected by RT-PCR, but the target band appeared in the positive control group.After 40 days old SPF chickens were administered continuously for 3 days, 0.02 mL of ink was injected into the trachea. The distance of ink movement in 1 min was measured. The results showed that the migration distance of ink was extremely significantly higher than that of saline control group (P<0.01).In the 17-day-old SPF chickens, IBV-M41 was infused into the nasal mucosa with 0.3 mL. After 24 h, 1 mL/kg was administered for 5 days. The results showed that there were significant differences in clinical symptom score and cure rate between the test drug group and the control group (P<0.05). There was no significant pathological changes in the tracheal mucosa of the experimental group, but the pathological changes in the positive control group were significant. The above results showed that Baihu Dingchuan oral liquid had good inhibitory effect on IBV in vitro, which could promote the movement of tracheal cilia, and had good clinical control effect on infectious bronchitis. 相似文献
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Electron microscopy of equine respiratory viruses in organ cultures of equine fetal respiratory tract epithelium 总被引：1，自引：0，他引：1
Organ cultures of equine fetal tracheal and nasal turbinate epithelium were inoculated with equine influenza virus-A1 (EIV-A1), equine herpesvirus-1 (EHV-1), or equine rhinovirus-1 (ERV-1). Infected organ cultures were processed for scanning and transmission electron microscopy at various intervals and were compared with noninfected controls. Organ cultures inoculated with ERV-1 appeared normal with the exception of rare island-like lesions in infected nasal turbinate. Virus particles were not seen in thin sections of organ cultures infected with ERV-1. The EHV-1 caused extensive loss of the epithelial layer in tracheal and nasal turbinate organ cultures. The classic stages of herpesvirus morphogenesis were seen in thin sections of organ cultures infected with EHV-1. The EIV-A1 caused a scattered loss of cilia that was only apparent in infected tracheal organ cultures. Cilia were also seen bound in bundles. In thin sections, EIV-A1 particles were seen budding from the bases of microvilli. 相似文献
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Interferon production by bovine tracheal organ cultures infected with bovid herpesvirus 1 strains. 
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下载免费PDF全文 Studies have been made of antiviral inhibitors produced by bovine tracheal organ cultures inoculated with strains of bovid herpesvirus 1. The inhibitors, which had properties of interferon, were assayed by a plaque-reduction method in bovine turbinate cell cultures with vesicular stomatitis virus as challenge virus. Each of the four strains of bovid herpesvirus 1 studied induced interferon in bovine tracheal organ cultures. 相似文献
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Five trials were conducted to compare four in vitro methods of isolating avian infectious bronchitis virus (IBV)-direct organ culture of infected tracheal rings (DOC), inoculation of tracheal organ culture (OC), inoculation of chicken embryo, and inoculation of cultured cells. DOC was prepared from tracheas of chickens experimentally inoculated with field samples. In the other methods, pooled tracheal and kidney suspensions were used to inoculate OC, chicken embryos, and cultured cells. IBV was consistently isolated at the initial passage by the DOC and OC inoculation systems, but it was not always isolated by embryo inoculation and never isolated by cultured-cell inoculation. When combined with immunofluorescent staining, DOC was much more efficient than the OC inoculation system for isolation and identification of the five strains of IBV tested because of its simplicity and speed. 相似文献
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鸡传染性支气管炎病毒（IBV）的血清学分型研究 总被引：6，自引：0，他引：6
本文动用气管环血清中和试验对１２个ＩＢＶ毒株进行了血清研究。以气管环纤毛运动为指示系统，以能中和２．０ｌｏｇ１０ＣＤ５０同源病毒血清效价为１个抗体单位，含２０个抗体单位的血清与等量病毒作用测定血清对纤毛运动保护百分率，以欧氏距离数字分类分型，并用ＳＰＳＳ软件聚类分型分析。 相似文献
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对 18日龄 SPF鸡人工接种鸡败血霉形体 (MG) KPF2 1 株 ,分别在接种后 5、12、19、2 6、33d进行血清平板凝集试验、尸体剖检、病理组织学观察和呼吸器官的电镜观察。结果如下 :接种 MG后 ,雏鸡呈 MG血清学反应阳性 ,但无明显的临床症状 ;病理组织学观察 ,呼吸器官主要反应是淋巴细胞浸润 ,有颗粒白细胞增多。电镜观察证实了病理组织学观察的结果 ,同时还发现 ,接种后 19d MG贴附于呼吸道的粘膜上皮 ,引起细胞膜的不平整 ,继而破坏生物膜结构 ,使气管及支气管的纤毛脱落 ;气管粘膜上皮、肺毛细管壁细胞及气囊壁细胞的微绒毛脱落 ;细胞内质网和线粒体肿胀呈球状 ,线粒体嵴逐步消失 ,最终导致细胞死亡、崩解。呼吸器官的功能部分减退甚至消失。 相似文献