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1.
副鸡嗜血杆菌人工感染鸡血清凝集抗体动态观察 总被引：1，自引：0，他引：1
在检测鸡传染性鼻炎 ( IC)抗体的血清学方法中 ,血清平板凝集试验 ( SPA) ,不但操作简便快速 ,还具有较高的敏感性和特异性 ,因此是生产中较为常用的鸡传染性鼻炎抗体检测手段之一。为给本方法在疾病诊断中的应用提供进一步的参考 ,作者对A、C型副鸡嗜血杆菌人工感染鸡感染后 0～ 1 1周的血清 SPA抗体的动态变化进行了测定 ,现将试验情况报告如下。1 材料与方法1 .1 菌株与参考血清 标准株 0 0 83( A型 )、Modesto( C型 )来自美国菌种保藏中心。地方分离株 Hp8、H1 8为本实验室保存。阴、阳性对照血清 :本实验室保存 ,阴性血清采自… 相似文献
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应用3批鸡传染性鼻炎二价油乳剂灭活疫苗进行了保存期检验，结果表明，二价苗在4－8℃保存12个月和18个月后免疫鸡群，鸡群对A、C型强致病力菌株的保护率在二免后4周左右分别为100％和88．5％，血清SPA、阻断ELISA和HI抗体阳性检出率较高，但疫苗保存18个月后所免疫鸡的血清C型HI抗体效价的几何平均数有显著的下降。因此，该二价苗的保存期以12个月为宜。 相似文献
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用引起肾病／肾炎的鸡传染性支气管炎病毒（ＩＢＶ）Ｋａｇｏｓｈｉｍａ－３４株实验感染２、４和６周龄的鸡，根据临床症状、粪便中病毒的排泄和血清中和抗体效价，比较了每组鸡的易感程度。结果表明，虽然所有的鸡对ＩＢＶ均表现为易感，但在２周龄组观察到最严重的临床反应，其病毒排毒期也最长。感染后第４周检测到较高的抗体效价，在４和６周龄组的鸡中，高抗体效价至少可维持１６周；相反，２周龄组鸡在感染后８￣１２周才检到 相似文献
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5.
选用2个厂家生产的重组禽流感灭活疫苗（H5N1,Re-1株）免疫慢大型鸡群,于1、7、13、16、18日龄采用HI血凝抑制试验测定其母源抗体水平,确定其首免时间为18日龄;于23、28、36、42、56、70日龄采用HI血凝抑制试验测定其免疫后抗体水平,结果表明：对慢大鸡产生的H5抗体效价,A、B组差异显著（P<0.05）; A、C组差异极显著（P<0.01）;B、C组差异极显著（P<0.01）;对慢大鸡产生的H9抗体效价,A、B组差异不显著（P>0.05）;A、C组差异显著（P<0.05）;B、C组差异极显著（P<0.01）,但在同等免疫剂量条件下,一定时间内,两个厂家生产的重组禽流感灭活疫苗（H5N1,Re-1株）对慢大型鸡均能产生较快、较高水平的H5抗体效价。 相似文献
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斑点免疫金渗滤法检测鸡白痢/鸡伤寒沙门氏菌抗体的应用研究 总被引：2，自引：0，他引：2
将鸡伤寒沙门氏菌LPS抗原包被于渗滤盒检测区（T区），针对沙门氏菌O9抗原单克隆抗体3-47-0包被在质控区（C区），用胶体金标记鸡伤寒沙门氏菌LPS抗原，建立了一种抗原夹心法快速检测鸡白痢、鸡伤寒沙门氏菌抗体的斑点免疫金渗滤法（DIGFA）。DIGFA比玻板凝集试验（PAT）灵敏度高，人工感染鸡试验表明在感染后第7d即可从32只鸡中的7只检测到抗体，在时间上早于PAT。722份现场血清样品的检疫结果表明，DIGFA的阳性检出率稍高于PAT，阳性样品抗体几何平均滴度DIGFA大于PAT法（P〈0．05）。DIGFA的结果得到细菌分离试验的验证。这些结果表明DIGFA快速、灵敏、准确，为鸡伤寒和鸡白痢的检疫提供了一个新的有效手段。 相似文献
7.
不同方法对鸡胚和法氏囊中囊病病毒抗原含量的检测比较 总被引：5，自引：1，他引：4
用单抗介导的抗原捕获－酶联免疫吸附试验（AC－ELISA），琼脂扩散试验（ACP）快速诊断试纸条（ISK）对感染同株强毒或弱毒囊病病毒（IBDV）的鸡胚和鸡法氏囊中的病毒抗原效价进行了检测比较，结果表明，上述3种方法测得法氏囊中温毒IBDV抗原效价分别为10^6.0(AC-ELISA),2^-3.0(AGP)t 10^-3.0，测得鸡胚中强毒IBDV抗原效价依次为10^-1.0,0和0。强毒株接种鸡胚后，只有第1代鸡胚组织可被AC－ELISA测到低效价的IBDV抗原，而第2代以后则未能测到病毒抗原，弱毒疫苗株IBDV感染鸡后，法氏囊中可测到低效价抗原，但感染鸡胚后则无可测性病毒抗原。 相似文献
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新城疫与禽流感(H9亚型)二联油乳剂灭活苗免疫效力试验 总被引：1，自引：1，他引：0
用新城疫病毒（NDV）LaSota株与禽流感病毒（AIV）F株尿囊腔接种非免疫难胚，取72－120小时死亡鸡胚液。灭活后分别制成新城疫油乳剂灭活苗、禽流感（H9亚型）油乳剂灭活苗、新城疫与禽流感（H9亚型）二联油乳剂灭活苗，免疫7日龄非免疫雏鸡，一周后开始检测ND、AI血凝抑制（HI）抗体体，两周时各免疫组鸡的抗体效价都达到6log2以上，3周达到高峰，后维持在较高水平达45天以上，在65日龄进行攻毒，结果单苗和二联苗免疫鸡全部得到保护。 相似文献
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用大肠杆菌BL21表达了马立克氏病病毒（MDV）强毒GA株的囊膜糖蛋白B（gB)基因，通过SDS－聚丙烯酰胺凝胶龟泳（SDS－PAGE）分离表达蛋白条带，切下并碾碎后作为免疫原制备单克隆抗体。通过酶联免疫吸附试验（ELISA）和间接免疫荧光试验（IFA），得到1株GA株阳性的单克隆抗体杂交瘤细胞株7C8。该单抗腹水的ELISA效价为1：2^12，IFA效价为1：800，与MDV不同致病型毒株CVI988、GA、RB1B、MD11、648A株感染的鸡胚成纤维细胞（CEF）均呈IFA阳性。1：100稀释时与GA感染的CEF在斑点酶联免疫吸附试验（dot-ELISA)中呈阳性。 相似文献
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用大肠杆菌BL21表达了马立克氏病病毒（MDV）强毒GA株的囊膜糖蛋白B（gB）基因，通过SDS－PAGE电泳分离表达蛋白条带，切下并碾碎后作为免疫原制备单克隆抗体。通过ELISA和间接免疫荧光试验（IFA），得到1株阳性单克隆抗体杂交瘤细胞株7C8。该单抗腹水的ELISA效价为1：2^12，IFA效价为1：800，与MDV不同致病型毒株CVI988、GA、RB1B、MD11、648A株感染的鸡胚成纤维细胞（CEF）均呈IFA阳性。1：100稀释时与GA株感染的CEF在斑点酶联免疫吸附试验（dot-ELISA)中呈阳性。 相似文献
11.
ZHANG Zhen-hua LI Lin ZHANG Jian-wei SHEN Jia SHI Ai-hua HUANG Feng-jun ZHENG Xiao-lan JIANG Bei-yu 《中国畜牧兽医》2016,43(5):1374-1378
1-day-old SPF chickens and commercial Jingfen chickens were vaccinated with IBD immune complex(IC) vaccine, NDV La Sota vaccine were inoculated simultaneously every one week and every two weeks.NDV La Sota immunization alone was as the control group.At the 2nd, 3rd, 4th and 5th week post inoculation, blood samples were taken and the ND HI antibody were tested.Experimental chickens were challenged with high virulent NDV at the 5th week post inoculation, the protective rate of each group was calculated.The results showed the ND HI antibody were not significant different in the combined immunization of IBD IC vaccine priming and NDV La Sota vaccine boost and NDV La Sota vaccine alone immunization (P>0.05).The results indicated that IBD IC vaccine has no immunosuppression on NDV La Sota vaccine in SPF chickens and commercial Jingfen chickens. 相似文献
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重组禽流感病毒灭活疫苗(H5N1亚型,Re-1株)免疫鸡抗体消长规律及免疫程序的初步研究 总被引：4，自引：0，他引：4
研究新型重组H5N1亚型禽流感灭活疫苗对种鸡和肉鸡的免疫原性,并对雏鸡母源抗体和免疫后的抗体进行动态观察,根据试验结果推荐该疫苗对鸡的免疫程序。用HI方法检测种鸡、肉鸡的母源抗体和免疫抗体,根据母源抗体的衰减和免疫抗体的消长规律确定首免和再免日龄。结果表明种鸡的母源抗体约能维持10 d多;0.3 mL/羽首免后10 d HI抗体就可达到6.40 log2,3-5周达到高峰期,至免疫17周后(19周龄)HI抗体水平仍然维持在4.88 log2;19周龄时0.5 mL/羽进行二免,有效抗体能维持约20周;280日龄0.5 mL/羽三免后抗体水平均一,下降缓慢,至种鸡淘汰时(三免后29周)抗体水平仍能维持在5.32 log2。肉鸡母源抗体约能维持7d,10日龄时0.3 mL/羽免疫,有效抗体能维持到上市。新型重组H5N1亚型禽流感灭活疫苗对鸡的免疫原性确实。 相似文献
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SIMULATED NATURAL INFECTION OF CHICKENS WITH AUSTRALIAN LENTOGENIC NEWCASTLE DISEASE VIRUS AND SUBSEQUENT CHALLENGE WITH VIRULENT VIRUS 总被引：1，自引：0，他引：1
A. J. Turner M.V.Sc. Ph.D. R. P. Hanson Ph.D. J. Spalatin V.M.D. 《Australian veterinary journal》1976,52(11):524-528
A total of 291 eight-week-old chickens were exposed to chickens infected with either of two Australian lentogenic strains (V4 and AVL NDV-1) of Newcastle disease virus (NDV). At 3 weeks after exposure, all chickens exposed to V4 infected chickens had developed haemagglutination-inhibition (HI) antibody. All chickens exposed to AVL NDV-1 virus infected chickens had developed HI antibody 5 weeks later. This sudden late appearance of HI antibody, to titres higher than those observed with V4 chickens, was explained by V4 virus being introduced to the AVL NDV-1 group of chickens. When groups of these chickens were challenged with Roakin virus (mesogenic NDV) at 3 weeks and Fontana 1083 virus (viscerotropic velogenic NDV) and Texas GB virus (neutrotropic NDV) at 3, 5, 10 and 21 weeks only three chickens developed clinical illness one of which died. These chickens were one AVL NDV-1 chicken contact challenged with Fontana 1083 virus at 3 weeks, one V4 chicken oronasally challenged with Texas GB virus at 5 weeks and one V4 chicken challenged oronasally with Fontana 1083 virus at 10 weeks. Susceptible non-vaccinated chickens died soon after challenge. Challenge by oronasal infection with 10(7.0) ELD50 of virus or contact with susceptible infected chickens enabled virulent virus to be isolated from most chickens and was accompanied by a large anamnestic increase in serum HI antibody. 相似文献
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本研究采用ＡＧＰ、ＨＩ等试验方法，对经Ｈ９亚型禽流感油乳剂灭活苗免疫、免疫后攻毒以及经Ｈ９Ｎ２活毒人工感染后的ＳＰＦ鸡抗体产生、消长规律进行了测定，结果表明人工感染ＳＰＦ鸡和免疫鸡一周后，ＡＧＰ的检出率即可达到１００％；Ｈ９亚型禽流感油乳剂灭活苗自免疫后一周内即可产生ＨＩ抗体，２１－２８天达到高峰，并能对相同亚型病毒感染引发良好的免疫反应。 相似文献
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将鸡新城疫、禽流感（H9亚型,SY株）二联灭活疫苗与市售同类对照苗分不同剂量皮下注射接种30日龄SPF鸡,免疫后定期采血,分离血清,通过检测血清中ND和AI的HI抗体水平比较各组鸡抗体产生期、抗体高峰及免疫持续期,并进行不同血凝抗原检测HI抗体结果的对比。试验鸡血清样品检测结果显示,免疫鸡抗体产生期为免后2周内,免后8周和5周ND和AI的HI抗体滴度分别达到峰值,抗体至少可持续28周以上,两种灭活苗之间免疫效果基本相当。 相似文献
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间接ELISA,HI及AGP检测鸡血清中抗AIV抗体的敏感性比较 总被引：7，自引：1，他引：6
用鸭源Ａ型流感病毒Ｈ９Ｎ？滴鼻、点眼辅以腹腔注射,人工感染３周龄ＳＰＦ来航鸡,分别用ＡＧＰ、ＨＩ试验及间接ＥＬＩＳＡ定期测定其抗ＡＩＶ血清效价。结果,ＨＩ试验及间接ＥＬＩＳＡ于攻毒后第７～７９天显示阳性;ＡＧＰ试验从第１３～７９天呈阳性。根据首次检出血清中抗ＡＩＶ抗体的时间,间接ＥＬＩＳＡ比ＡＧＰ、ＨＩ更灵敏、快速。 相似文献
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禽白血病病毒J亚群(ALV-J)的攻毒试验 总被引：2，自引：1，他引：1
将禽白血病病毒 J亚群 (AL V- J)内蒙株 NM876 1和 NM9996人工接种于 1日龄爱维茵肉种鸡 ,通过眼观、病理组织学检查观察了攻毒鸡的病理学特征 ;通过 PCR和 EL ISA技术检测了病毒感染率、抗体变化规律以及病毒和抗体的相关性。结果显示 ,攻毒鸡从第 3周开始即可检出病毒 ,NM876 1株和 NM9996株病毒感染率分别为 71.4 %和6 4 .3% ;从第 5周开始 ,出现较明显的病理学变化 ,病变特征以骨髓、肝脏、心脏、脾、卵巢等组织内髓细胞增生为主 ,而法氏囊、脑、坐骨神经无变化 ;攻毒鸡抗体消长变化有一定的规律 ,一般在 7～ 8周龄和 18～ 2 0周龄时分别出现 1次高峰 ,而在 4～ 6周龄、10周龄和 2 3周龄分别出现 1次低谷 ,提示鸡场进行 EL ISA检测时要避开这一时期 ;攻毒鸡产生耐受性病毒血症 ,即病毒阳性而抗体阴性 (V A- )的比例较高 (7/14 ,9/14 )。通过以上的研究证明 ,AL V- J内蒙株疾病模型复制成功 ,NM876 1、NM9996可作为原型株进行相关研究 相似文献
18.
Two monoclonal antibody-blocking enzyme-linked immunosorbent assays (B-ELISAs) were developed to detect serovar-specific antibodies to Haemophilus paragallinarum. One assay detected antibodies against serovar A and the other antibodies against serovar C. The assays were evaluated with sera derived from disease-free chickens as well as chickens experimentally immunized and/or challenged with H. paragallinarum strains 0083 (serovar A), Modesto (serovar C), or HP31 (serovar C). When tested with 440 negative sera (170 from a specific-pathogen-free and 30 from each of nine commercial layer flocks), both tests gave only a single false-positive reaction. The use of the B-ELISAs with the experimentally produced sera showed the assays to be serovar specific. With the exception of one serum, the serovar A B-ELISA detected antibodies only in the chickens vaccinated with 0083. Similarly, with the exception of one serum, the serovar C B-ELISA detected antibodies only in those chickens vaccinated with Modesto or those chickens challenged with HP31. Overall, the serovar A B-ELISA had a specificity of 99.7% and a sensitivity of 78.7%, whereas the serovar C B-ELISA had a specificity of 99.8% and a sensitivity of 64.7%. 相似文献
19.
An enzyme-linked immunosorbent assay for the detection of antibody to avian reovirus by using protein sigma B as the coating antigen 总被引：2，自引：0，他引：2
An enzyme-linked immunosorbent assay using the expressed protein sigma B as the coating antigen (sigma B-ELISA) for detecting antibody to avian reovirus (ARV) in chickens was developed and compared with a conventional ELISA. Both ELISA s and a serum neutralisation (SN) test were used to test the sera from experimentally vaccinated and farm chickens. The sigma B-ELISA could clearly distinguish the SN-positive and -negative sera in 38-week-old chickens. The correlation rate between SN and a sigma B-ELISA was 100 per cent (65/65), and that between SN and conventional ELISA was 84 per cent (55/65). With the sigma B-ELISA, all SN-negative sera had low absorbance values (below 0.06), and the absorbance values correlated closely with the SN titres. However, the sera which were antibody-negative by SN had various absorbance values, ranging from 0.07 to 0.39 in the conventional ELISA. Hence, the sigma B-ELISA had lower non-specific binding reactions than the conventional ELISA against sera from ARV -negative birds. Antibody against ARV could be detected by sigma B-ELISA after vaccination. Absorbance values peaked 4 weeks after vaccination at 2 weeks of age and were maintained until the birds were 27 weeks old. The results suggest that the presence of antibody against viral protein sigma B in birds may be used as a good indicator by the sigma B - ELISA for detecting immune status of a chicken flock or to detect chickens infected with ARV. 相似文献