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鸡传染性支气管炎病毒血凝谱 总被引：1，自引：0，他引：1
用鸡传染性支气管炎病毒标准毒株Ｈ５２、Ｍ４１、Ｔ、Ｎ１１５、ＩＢＶ６２株及国内华中（ＨＺ）、华东（ＨＤ）、华南（ＨＮ）、华北（ＨＢ）、东北（ＤＢ）及西北（ＸＢ）等地方性分离株试验,研究ＩＢＶ血凝特性。结果表明,ＩＢＶ不直接凝集鸡、牛、兔、小白鼠、仓鼠、猪、鹅、马、绵羊及人的“Ｏ”型红细胞;１％胰蛋白酶３７℃作用ＩＢＶ４ｈ后,可凝集鸡、兔、小白鼠、仓鼠、鹅等动物红细胞;１０％乙醚３７℃作用ＩＢＶ２ｈ后,可凝集鸡、牛、小白鼠、仓鼠、鹅、绵羊及人的“Ｏ”型红细胞;１％卵磷脂酶Ｃ３７℃作用ＩＢＶ４ｈ后,可凝集鸡、兔、小白鼠、仓鼠、鹅等动物红细胞。 相似文献
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本文对ＥＤＳ－７６陕西分离株的部分理化特性及血凝特性进行了初步研究。结果表明：该株对乙醚和氯仿不敏感、对酸，对热敏感，５６℃、６０℃、７０℃１ｈ均可使其失去对鸭胚的感染性，染料的光动力作用对其感染性也有影响。该病毒能凝集鸡、鸭、鹅、鸽子和麻雀的红细胞，且血凝性能好，但不能凝集燕子，牛、马、绵羊、兔、狗、小白鼠和豚鼠的红细胞；其中对ＥＤＳ－７６病毒能凝集麻雀而不能凝集燕子红细胞特性的确定，属国内外尚 相似文献
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鸡减蛋综合征病毒血凝特性和在鸭胚中繁殖规律的研究 总被引：1，自引：0，他引：1
EDS病毒CH—1分离株能凝集鸡、鸭和鹅等禽类的红细胞,但不能凝集兔、小白鼠和人O型血红细胞。该病毒的血凝特性对缓冲液种类和浓度无严格要求。可耐受56℃24小时,但80℃作用30分钟,则几乎完全丧失血凝活性。1.0％胰酶和0.5％β—巯基乙醇对病毒血凝活性无明显影响,用0.1～0.4％甲醛37℃作用24小时血凝活性无变化,而0.5～1.0％甲醛处理后,病毒血凝价下降4～7个滴度。病毒反复冻融6次对血凝特性无影响。EDS病毒接种10日龄鸭胚后24小时就可检测到病毒的血凝滴度(2~(3.2))、96～120小时病毒在鸭胚液中的血凝滴度达到高峰(HA>2~(14)),此时胚液量也最大。病毒在鸭胚尿囊液和尿囊膜中的血凝滴度最高,其次是羊水,胚体中血凝滴度最低。 相似文献
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嗜水气单胞菌粘附特性的研究 总被引：7，自引：1，他引：6
不同来源的６株嗜水气单胞菌（Ａｅｒｏｍｏｎａｓｈｙｄｒｏｐｈｉｌａ）对１０种不同红细胞的血凝试验表明，Ｊ－１株能凝集所有的１０种红细胞，而与其他菌株的血凝谱有所不同。血凝图式有２种：人、鸡、麻雀的红细胞凝集快，呈大小不等的絮状；而鲫鱼、绵羊、猪、小鼠、兔、鸭、犬的红细胞凝集慢，且呈均匀颗粒状。这两种血凝均能被Ｄ－甘露糖抑制，但不能被Ｊ－１株Ｒ菌毛抑制。组织粘附试验显示，Ｊ－１株能粘附小鼠和鲫鱼的肠组织和肠绒毛。将提纯的Ｒ菌毛预处理肠组织，或用Ｄ－甘露糖或木瓜蛋白酶消化的Ｒ菌毛抗血清Ｆａｂ片段预处理菌体，都不能抑制上述的粘附作用。Ｊ－１株对ＨＥｐ－２细胞显示强粘附，菌体随机粘附在细胞上，有少数侵入细胞浆内。其余５株菌的粘附特性与Ｊ－１株不尽相同。所有６株菌对草鱼肠组织及肠绒毛、ＥＰＣ细胞（鲤鱼乳头状上皮瘤细胞系）均无粘附性。 相似文献
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鹅类新城疫病毒的血凝特性研究 总被引：2，自引：0，他引：2
对鹅类新城疫病毒的血凝特性研究表明，该病毒能凝集禽类、两栖类和某些哺乳动物的红细胞，不凝集驴红细胞首次从病科分离的鸭胚毒不凝集多种动物的红细胞，但经数次传代后，对红细胞的凝集价可达２＾４，该病毒与鸡新城疫病毒（ＮＤＶ）的血凝试验无明显差别。本病毒为快解脱型，于５６℃４５分钟失去血凝活性，与ＮＤＶ有相近的血凝抗原。 相似文献
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为观察猪流行性腹泻病毒(PDEV)的血凝特性,进而为建立PEDVHA和HI试验,评估疫苗免疫抗体水平奠定基础,将CV777、DR13、YN13和YN144共4株PEDV毒株,在37℃下,分别用0、5、10、50、100μg/mL胰蛋白酶处理30min,然后用鸡、兔和猪红细胞进行血凝(HA)试验;用已经鉴定为PEDV抗体阳性的血清和乳清分别进行血凝抑制(HI)试验。结果显示:4株PEDV毒株只与兔红细胞发生凝集反应;CV777、DR13毒株的HA现象需要用5μg/mL的胰蛋白酶进行预处理,但是YN13和YN144毒株的HA现象不需要胰蛋白酶作用;该凝集现象能够被PEDV抗体特异性抑制。结果表明,PEDV能够凝集兔的红细胞,不能凝集鸡和猪的红细胞,因而可以用兔红细胞建立PEDV的HA和HI试验方法。 相似文献
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本试验旨在探讨ＥＤＳ病毒血凝反应的最佳反应条件,观察病毒对各种动物红细胞的凝集谱,测定各种因素对病毒血凝素的影响,结果表明,血凝反应宜采用１％的鸡红血球,稀释液用ｐＨ７的生理盐水,室温作用３５ｍｉｎ（分钟）后观察表明,该病毒能凝集鸡,鸭,鹅红细胞,而不能凝集哺乳动物红细胞,耐热,５６℃１ｈ不影响其血凝性,对胰酶和浓度大于０．４％的甲醛敏感;反复冻融８次对血凝效价无影响。 相似文献
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马动脉炎病毒的血凝性研究 总被引：8，自引：2，他引：6
在RK－13细胞上培养的马动脉炎病毒（Equine viral arteritis,EAV)在4℃、室温和37℃条件下，用多种动物的红细胞进行血凝试验，病毒在不同温度下均可凝集小鼠和鸡的红细胞，但不能凝集牛、绵羊、山羊、马、猪、豚鼠、仓鼠、兔及鹅的红细胞。将病毒用吐温－80和乙醚处理后，血凝活力会显著增强，其HA效价比未经处理的病毒高4－8倍，且血凝像更加清晰。处理病毒的最适条件是在冰浴状态下用终浓度0．6－1．25mL/L吐温－80振荡处理15－60min，再加1／2体积的乙醚振荡作用5－15min. 相似文献
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Vicente Vega Andrea Zepeda Saúl Ramírez Vladimir Morales Pomposo Fernández Roberto Montes de Oca Fernando M Guerra-Infante María de Jesús de Haro-Cruz Patrick J Blackall Edgardo V Soriano 《Journal of veterinary diagnostic investigation》2008,20(3):353-355
In the present study, the hemagglutinating activity of 9 reference strains (serovars A-I) of Ornithobacterium rhinotracheale was investigated by using fresh erythrocytes from 15 different species: chicken (broiler, rooster, hen), turkey, pigeon, quail, duck, Harris hawk (Parabuteo unicinctus), house finch (Carpodacus mexicanus), cow, sheep, horse, dog, rabbit, pig, human (groups A, B, AB, and O), and rainbow trout (Oncorhynchus mykiss). All 9 strains agglutinated rabbit erythrocytes. None of the strains was able to agglutinate hen, cow, horse, or rainbow trout erythrocytes. The number of positive reactions among the remaining species varied. Results indicate that the use of rabbit erythrocytes is better suited for testing the hemagglutinating activity of O. rhinotracheale. 相似文献
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鸭源新城疫病毒的分离鉴定 总被引：1，自引：0，他引：1
从病死肉鸭肝脏中分离到2株病毒(ZH1、ZH2),均能够凝集鸡、肉鸭、绵羊、山羊、猪、人、兔、牛等的红细胞,且这种血凝性可被NDV标准阳性血清所抑制.参照NDV毒力判定标准及其方法对分离毒株ZH1、ZH2进行了鸡胚最小致死量平均死亡时间(MDT)、鸡胚半数感染量(EID50)以及1日龄鸡脑内接种致病指数(ICPI)测定,结果ZH1、ZH2株的MDT为52 h和44 h,EID50为106.4/0.1mL和108.64/0.1mL,ICPI为1.93和1.975.表明这2株分离病毒均为NDV强毒株. 相似文献
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我国部分地区新城疫病毒分离株生物学特性的研究 总被引：1，自引：0，他引：1
从北京、昌黎、广州、长春、四平、青岛等地区采集疑似新城疫病鸡的病料，通过鸡胚接种分离出6株病毒，经血凝、血凝抑制试验和形态学观察，鉴定为新城疫病毒（NDV），分别命名为北京株、昌黎株、广州株、长春株、四平株、青岛株。测定了这6株NDV的致死鸡胚的平均时间（MDT）和脑内致病指数（ICPI），MDT分别为58．2，64．5，55．2，96。0．61．2和57．9h，ICPI分别为1．66，1．45，1．60，0．69，1．45和1．65。由这两项指标判定北京株、广州株、青岛株为强毒株，昌黎株和四平株为中强毒株，长春株为弱毒株。此外,还测定了6株NDV的血凝谱，各毒株均能凝集鸡和人（O型血）的红细胞，对猪、山羊、绵羊、牛和马的红细胞凝集作用有差异。 相似文献
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Passage of duck hepatitis virus in cell cultures derived from avian embryos of different species 总被引：2，自引：0，他引：2
An egg-attenuated strain of duck hepatitis virus was successfully passaged through cell cultures of avian embryos derived from goose, turkey, guinea fowl, Japanese quail, pheasant and chicken. Two field strains of the virus were passaged in a more limited range of species. 相似文献
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试验旨在对2株血凝活性较弱的H9N2亚型禽流感病毒(avian influenza virus,AIV)进行病毒特性的研究。采用HA/HI、电镜观察、HA和NA测序等方法对2株分离株进行了病毒的鉴定;采用形态学、化学和生物学方法对这2株分离株进行研究。2株病毒被确定为A型H9N2亚型AIV;病毒粒子在透射电镜下为圆形、椭圆形、杆状并呈多型性,大小为80~120 nm;血凝素(HA)均为中等耐热型;病毒50 ℃均耐热;均能凝集公鸡和人O型红细胞,但凝集作用开始并未出现,而是随着病毒的传代逐渐恢复;均不凝集猪、牛、羊、兔和马红细胞;2株病毒均对乙醚、氯仿不敏感,只有1株病毒对酸敏感;病毒对鸡胚无致死性,EID50均为1×10-7/0.2 mL;经鼻腔途径感染小白鼠,均未导致小鼠出现症状和死亡,接种后第14天在小鼠血清中可检出相应病毒的抗体。研究结果表明,上海地区活禽交易市场存在对环境条件具有较强耐受性的H9N2亚型AIV。 相似文献
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LIU Jian YANG Xian-chao XU Feng LI Xin DENG Bo YANG De-quan JU Hou-bin QI Xin-yong GE Jie ZHOU Jin-ping 《中国畜牧兽医》2016,43(6):1624-1629
To study the characteristics of 2 low hemagglutinating activity H9N2 avian influenza virus (AIV) strains.2 strains were identified by HA/HI,electron microscope observation,HA and NA sequencing.The virus characteristics were studied by morphology,chemistry and biology.2 isolates were identified as H9N2 AIV.The observations demonstrated that the virions expressed various shapes of spherical,oval,elongated forms and polymorphism with diameters in a range of 80 to 120 nm.Hemagglutinin(HA) of the 2 strains was medium-stable to heat,and they were heat-resistant under 50 ℃.2 isolates could agglutinate cock and human O type red blood cells.The agglutination did not appear on the original isolates,but recovered with the passage of virus gradually.2 isolates did not agglutinate pig,cattle,sheep,rabbit and horse red blood cells.2 strains were not sensitive to the ether and chloroform,and only one isolate was sensitive to acids.2 strains were not fatal to the chicken embryo,and the EID50 were both 1×10-7/0.2 mL.The small White mice showed no clinical symptoms and no deaths after being inoculated with the viruses via respiratory route in our experiment.Serum antibody HI titers of the survived mice were measured after inoculated 14 d,and the antibody of H9N2 AIV were positive.Some tolerant H9N2 strains existed in live animal markets of Shanghai area. 相似文献
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The in vitro hemolytic activity of Tritrichomonas foetus was investigated. The parasite was tested against human erythrocytes of groups A, B, AB, and O, and against erythrocytes of nine adult animals of different species (the rabbit, rat, chicken, cat, dog, swine, horse, bovine, and sheep). The results showed that T. foetus strains (ATCC KV1, K, PAL, 5022, RJ, 90) did not present any hemolytic activity against any human erythrocyte group nor against rabbit, rat, chicken, cat, dog and swine erythrocytes. T. foetus strains, however, lysed horse, bovine, and sheep erythrocytes. No hemolysin released by the parasites could be identified. Hemolysis did not occur with trichomonad culture supernatants, with sonicated extracts of T. foetus, nor with killed organisms. Scanning electron microscopy (SEM) showed that human erythrocytes did not adhere to the trophozoites, in contrast horse erythrocytes adhered to the surface of the parasites and were phagocytosed for up to 90 min. The parasites are able to exert their cytopathic effects through: (a) physical contact established between the two cell surfaces, (b) toxins released from parasites into the interaction media, or (c) the association of both mechanisms. Further studies are necessary to clarify the importance of the hemolytic activity in the biology of T. foetus. 相似文献
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B K?hler J Zabke R Sondermann H Pulst H J Rummler 《Archiv fuer experimentelle veterinaermedizin》1979,33(4):595-619
Necrotising enteritis had been the cause of death of 4.9 per cent in 5,177 nursed piglets, which was established by pathological examination. The number of piglets, in that context, which had come from industrialised sow breeding units was equivalent to 92 per cent. The nursed piglet held the third position, next to smaller ruminants (19.4 per cent) and fowl (6.0 per cent), with regard to the occurrence of Clostridium perfringens enterotoxemia or necrotising enteritis in 112,218 animals which were pathologically examined after death. Necrotising enteritis so far has been rare in the GDR. No regional accumulation has been observed. Several outbreaks on industrialised sow breeding units actually remained stationary. The occurrence of the disease may be favoured by a number of factors which are conducive to accumulation of Clostridium perfringens Type C in a given stock. Group keeping of pregnant sows, simultaneous farrowing of larger groups of sows, group treatment of nursed piglets, using neomycin, chloramphenicol, oxytetracycline, and other antibiotics to which Clostridium perfringens is primarily resistant or has acquired resistance in the course of time are some of those contributive factors. Transmission of Clostridium perfringens Type C through feedstuff is possible, though it would lead to a real outbreak only by high intensity of the contamination, and it played a minor role in proliferation of the disease. 3479 Clostridium perfringens strains were isolated from 9,481 animals, both clinically intact and after death, with 30 species being included. Type classification revealed 2454 strains of Type A (70 per cent), 204 of Type D (5.88 per cent), 164 of Type C (four per cent), and 48 of Type B (1.34 per cent). There were 688 atoxic strains (17 per cent). Swine is the major carrier of Clostridium perfringens Type C, with 87 per cent of all Clostridium perfringens Type C strains having been isolated from swine. Swine was followed by fowl (four per cent), sheep (four per cent), cattle, rabbit, and dog (1.27 per cent each). Clostridium perfringens Type C was obtained from the faeces of clinically intact sows in seven instances, including two cases with sows (0.46 per cent) from farms with no previous record of necrotising enteritis. 相似文献