共查询到20条相似文献，搜索用时 62 毫秒
1.
间接ELISA检测禽霍乱抗体方法的建立 总被引：9，自引：0，他引：9
用多杀性巴氏杆菌 TJ8菌株制备ELISA抗原 ,与抗鸡 Ig单抗 1 B7酶结合物建立了检测鸡血清抗体水平的间接 ELISA方法。交叉试验、阻断试验、重复性试验等表明该方法重复性好、特异性强 ,灵敏度高。确立了将鸡血清 1 0 0倍稀释监测 ELISA效价(ET)的回归方程 y=1 .4981 + 0 .391 9x(P>0 .0 5 ) ,可用于定量测定。间接凝集试验与ELISA方法的比较试验表明 ,EL ISA法比间接血凝试验敏感性高 4倍以上 相似文献
2.
为建立鸡毒支原体(MG)种特异性检测的间接ELISA检测方法,本研究以原核表达的PvpA蛋白作为包被抗原,初步建立了检测MG抗体的间接ELISA检测方法.特异性试验结果表明,重组PvpA蛋白与鸡新城疫病毒、鸡传染性支气管炎病毒、滑液支原体、大肠杆菌“O”抗原、禽沙门氏茵“O”抗原阳性血清均不发生交叉反应.该方法的批内变异系数小于8％,批间变异系数小于11％,表明具有较好的重复性.采用该检测方法与进口试剂盒对不同省份送检的鸡血清进行检测比较,两者阳性和阴性符合率均达到90％以上.本研究建立的间接ELISA检测方法为MG抗体检测试剂盒的研制奠定了基础. 相似文献
3.
4.
利用鸭源鸡杆菌YU-PDS-RZ-1-SLG分离株制备超声波裂解抗原,建立了可以检测鸭源鸡杆菌多个血清型抗体的间接ELISA方法。包被抗原质量浓度为10mg/L,包被条件为37℃2h,再4℃过夜;封闭液为1%明胶,封闭条件为37℃1h;阴、阳性血清最佳稀释度为1∶100,酶标二抗工作滴度为1∶1 000;底物显色时间为15min。经交叉性试验、阻断试验和重复性试验证实建立的ELISA方法重复性好,特异性强。板内变异系数为2.01%～5.75%,板间变异系数为2.43%～6.20%。间接ELISA方法的灵敏度是微量凝集试验的25～100倍。利用所建立的ELISA方法检测了人工感染鸭源鸡杆菌的4日龄SPF鸡在感染后不同阶段感染组、同居组和空白对照组的血清抗体,并根据感染后不同阶段所测D450值绘制抗体消长曲线,其抗体水平在感染后32～47d开始上升,60d时达到高峰,但维持时间较短,2周后迅速下降。建立的间接ELISA方法可以用于临床病例的血清学快速检测,为进行鸭源鸡杆菌的血清流行病学调查提供了手段。 相似文献
5.
为建立快速检测鸡传染性支气管炎病毒(IBV)的血清学方法,本试验以IBV为检测抗原,建立了一种检测IBV抗体的间接ELISA方法,并对各种检测条件进行了优化.研究结果显示,抗原的最佳包被浓度为19.2 μg/mL,最佳包被条件为37 ℃ 1 h后4 ℃过夜;血清的最佳稀释度为1:800,37 ℃孵育60 min;酶标二抗稀释度为1:7 000,37 ℃孵育60 min;底物显色为37 ℃避光作用10 min.经特异性、重复性、敏感性试验证明,该方法与鸡常见病原的阳性血清均无交叉反应,重复性较好及血清稀释至1:12 800时仍可检测到IBV抗体.结果表明,本试验所建立的间接ELISA方法具有良好的特异性、重复性和敏感性. 相似文献
6.
比较不同ELISA包被抗原对禽霍乱免疫血清的检测结果,选择最佳的包被抗原建立禽霍乱血清抗体的间接ELISA检测方法.分别 使用超声波裂解抗原、脂多糖蛋白抗原和全菌抗原作为包被抗原,应用间接ELISA方法检测 禽霍乱免疫血清,并对不同抗原建立的ELISA方法进行重复性试验.根据三种抗原对 免疫血清的检测结果以及重复性试验,发现全菌抗原的敏感度、特异性、稳定性均优于其他 两种抗原.全菌抗原作为ELISA包被抗原用于禽霍乱血清学检测具有敏感度高、特异性强、稳定性好的特点. 相似文献
7.
本文介绍了几种弓形虫诊断方法,包括染色试验、间接血凝试验、改良凝集试验、间接免疫荧光抗体染色试验、酶联免疫吸附试验、免疫胶体金技术和干扰素释放反应。在使用活的、有毒力的速殖子情况下,染色试验(DT)仍然是特异性、敏感性和重复性良好的弓形虫病检测手段;间接血凝试验(IHA)特异性不高,但由于其具有简便快速的特点,经常应用于流行病学调查;改良凝集试验(MAT)也可以用于流行病学调查,且因其特异和敏感性高,目前仍然是检测弓形虫病的金标准;亲和力ELISA省时省力,对于鉴定弓形虫急慢性感染有较高的应用价值;免疫胶体金技术(GICT)适用于弓形虫病早期检测和诊断,适合在基层推广应用;干扰素释放反应(IGRA)目前主要应用于人的弓形虫检验,在动物的检测中有待进一步发展。 相似文献
8.
为建立鸡传染性法氏囊病病毒(IBDV)抗体的间接ELISA检测方法,应用原核表达的IBDV VP2蛋白作为包被抗原,经方阵试验确定间接ELISA试验的最佳反应条件：包被抗原的浓度为8 μg/mL,标准阴、阳性血清的稀释度为1:400,封闭液选用10 %马血清,酶标抗体最佳稀释倍数为1:15000,最佳抗原稀释液为0.01 M PBS(PH 7.2);抗原最佳包被条件为4 ℃过夜,待检血清和酶标二抗反应条件为37 ℃ 60 min,底物作用时间为15 min。待检血清的OD450nm≥0.288判为阳性,反之判为阴性。特异性试验、敏感性试验和重复性试验结果显示,该方法的特异性好、敏感高、重复性好。用建立的间接ELISA方法与商品化IDEXX-ELISA试剂盒对临床血清样品进行检测,符合率为93.5 %。该方法的建立为检测IBDV抗体提供了一种安全、特异、敏感、方便经济的检测方法,为鸡传染性法氏囊病免疫监测和预防控制提供了科学的技术手段。 相似文献
9.
10.
以基因工程表达的非洲猪瘟病毒VP73蛋白作为包被抗原,建立了间接ELISA方法,用以检测猪血清中抗非洲猪瘟VP73蛋白的抗体。该方法对非洲猪瘟标准阳性血清的检测灵敏度可以达到1∶2 560,与同类进口ELISA试剂盒相当。此方法只特异性检出非洲猪瘟阳性血清,而对猪传染性胸膜肺炎等5种猪传染病阳性血清的检测结果均为阴性,表明其具有良好的特异性。批内和批间重复性试验结果发现,检测同一份血清的变异系数小于10%,表明其重复性较好。包被好的酶标板37℃放置5d后,对同一份血清的检测敏感性无明显变化,初步表明其稳定性较好。利用建立的间接ELISA方法和进口ELISA试剂盒分别对150份血清样品进行非洲猪瘟血清抗体检测,结果表明本方法的特异性和敏感性分别为99.1%和94.3%,2种方法检测结果的符合率为98%。以上试验表明,本试验建立的间接ELISA方法具有良好的特异性和敏感性、较好的重复性和稳定性,可以满足临床检测的需求。 相似文献
11.
试验选用96头平均体重14.82 kg左右的杜×长×大断奶仔猪,随机分成4组,每组3栏,每栏8头(公母各半)。对照组饲喂基础日粮,试验1、2、3组分别添加1%80目白术、0.2%白术多糖和1%微米白术。试验期30 d。结果表明:在生长性能方面,与对照组相比,1%微米白术添加组可显著提高日增重(P0.05)、降低饲料增重比和腹泻率,而且效果优于1%80目白术组和0.2%白术多糖组,在肠道形态和肠道微生态区系方面,与对照组相比,日粮添加1%80目白术、0.2%白术多糖、1%微米白术均可不同程度的提高十二指肠和空肠的绒毛高度,加深十二指肠和空肠的隐窝深度,并且增加肠道微生态区系的多样性,其中以1%微米白术添加组的效果最佳。 相似文献
12.
Sissay, M.M., Uggla, A. and Waller, P.J., XXXX. Prevalence and seasonal incidence of nematode parasites and fluke infections
of sheep and goats in eastern Ethiopia. Tropical Animal Health and Production, XXXX. A 2-year abattoir survey was carried out to determine the prevalence, abundance and seasonal incidence of gastro-intestinal
(GI) nematodes and trematodes (flukes) of sheep and goats in the semi-arid zone of eastern Ethiopia. During May 2003 to April
2005, viscera including liver, lungs and GI tracts were collected from 655 sheep and 632 goats slaughtered at 4 abattoirs
located in the towns of Haramaya, Harar, Dire Dawa and Jijiga in eastern Ethiopia. All animals were raised in the farming
areas located within the community boundaries for each town. Collected materials were transported within 24 h to the parasitology
laboratory of Haramaya University for immediate processing. Thirteen species belonging to 9 genera of GI nematodes (Haemonchus contortus, Trichostrongylus axei, T. colubriformis, T. vitrinus, Nematodirus filicollis, N. spathiger, Oesophagostomum
columbianum, O. venulosum, Strongyloides papillosus, Bunostomum trigonocephalum, Trichuris ovis, Cooperia curticei and Chabertia ovina), and 4 species belonging to 3 genera of trematodes (Fasciola hepatica, F. gigantica, Paramphistomum {Calicohoron} microbothrium and Dicrocoelium dendriticum) were recorded in both sheep and goats. All animals in this investigation were infected with multiple species to varying
degrees. The mean burdens of adult nematodes were generally moderate in both sheep and goats and showed patterns of seasonal
abundance that corresponded with the bi-modal annual rainfall pattern, with highest burdens around the middle of the rainy
season. In both sheep and goats there were significant differences in the mean worm burdens and abundance of the different
nematode species between the four geographic locations, with worm burdens in the Haramaya and Harar areas greater than those
observed in the Dire Dawa and Jijiga locations. Similar seasonal variations were also observed in the prevalence of flukes.
But there were no significant differences in the prevalence of each fluke species between the four locations. Overall, the
results showed that Haemonchus, Trichostrongylus, Nematodirus, Oesophagostomum, Fasciola and Paramphistomum species were the most abundant helminth parasites of sheep and goats in eastern Ethiopia. 相似文献
13.
Tropical Animal Health and Production - 相似文献
14.
Rassnick KM Gieger TL Williams LE Ruslander DM Northrup NC Kristal O Myers NC Moore AS 《Journal of veterinary internal medicine / American College of Veterinary Internal Medicine》2001,15(3):196-199
1-(2-Chloroethyl)3-cyclohexyl-1-nitrosourea (CCNU) is an alkylating agent in the nitrosourea subclass. A prospective evaluation of CCNU was done to determine the maximally tolerated dosage of CCNU in tumor-bearing cats. Response data were obtained when available. Twenty-five cats were treated with CCNU at a dosage of 50-60 mg/m3 body surface area. Complete hematologic data were available for 13 cats. Neutropenia was the acute dose-limiting toxicity. The median neutrophil count at the nadir was 1,000 cells/microL (mean, 2,433 cells/microL; range, 0-9,694 cells/microL). The time of neutrophil nadir was variable, occurring 7-28 days after treatment, and counts sometimes did not return to normal for up to 14 days after the nadir. Based on these findings, a 6-week dosing interval and weekly hematologic monitoring after the 1st treatment with CCNU are recommended. The nadir of the platelet count may occur 14-21 days after treatment. The median platelet count at the nadir was 43,500 cells/microL. No gastrointestinal, renal, or hepatic toxicities were observed after a single CCNU treatment, and additional studies to evaluate the potential for cumulative toxicity should be performed. Five cats with lymphoma and 1 cat with mast cell tumor had measurable responses to CCNU. Phase II studies to evaluate antitumor activity should be completed with a dosing regimen of 50-60 mg/m3 every 6 weeks. 相似文献
15.
H Hayashi T Yoshimura J Y Chen 《Comparative immunology, microbiology and infectious diseases》1985,8(2):73-87
Our particular attention in this article was given to natural mediators for macrophages isolated from the sites of tissue injury. A number of chemotactic factors, which may satisfy many criteria making them acceptable as inflammatory leucocyte chemotactic factors, has been separated. Among them, our laboratory has isolated three macrophage (monocyte) chemotactic factors (MCF-a, -b and -c). Their purification, characterization and functional specificity are discussed. 相似文献
16.
Davis MS Willard MD Nelson SL Mandsager RE McKiernan BS Mansell JK Lehenbauer TW 《Journal of veterinary internal medicine / American College of Veterinary Internal Medicine》2003,17(3):311-314
Human and equine athletes are reported to have a high prevalence of gastric disease, and anecdotal evidence suggests a similar phenomenon applies to racing sled dogs. To investigate the prevalence of gastric disease in racing sled dogs, we conducted 2 gastroscopy studies on dogs competing in the annual Iditarod Sled Dog Race. A pilot study of dogs that were either dropped from the 2000 Iditarod Sled Dog Race because of illness or that finished the race indicated that, approximately 5 days after competing, 10 of 28 dogs (35%) had endoscopic evidence of gastric ulceration, erosion, or hemorrhage. The next year, an endoscopic study of 73 dogs participating in the 2001 Iditarod race was performed in order to evaluate a larger population of dogs. Data from 70 of these dogs could be used; 34 (48.5%) had ulceration, erosion, gastric hemorrhage, or some combination of these findings. When this group of 70 dogs was compared retrospectively to a control group of 87 dogs presented to the Texas A&M University (TAMU) Veterinary Medical Teaching Hospital, the Iditarod sled dogs had a significantly higher prevalence (P = .049) of gastric lesions. These findings suggest that, similar to athletes of other species, elite canine athletes have an increased prevalence of gastric disease compared to the canine population at large. 相似文献
17.
Furosemide continuous rate infusion in the horse: evaluation of enhanced efficacy and reduced side effects 总被引：1，自引：0，他引：1
Johansson AM Gardner SY Levine JF Papich MG LaFevers DH Fuquay LR Reagan VH Atkins CE 《Journal of veterinary internal medicine / American College of Veterinary Internal Medicine》2003,17(6):887-895
Continuous rate infusion (CRI) of furosemide in humans is considered superior to intermittent administration (IA). This study examined whether furosemide CRI, compared with IA, would increase diuretic efficacy with decreased fluid and electrolyte fluctuations and activation of the renin-angiotensin-aldosterone system (RAAS) in the horse. Five mares were used in a crossover-design study. During a 24-hour period, each horse received a total of 3 mg/kg furosemide by either CRI (0.12 mg/kg/h preceded by a loading dose of 0.12 mg/kg IV) or IA (1 mg/kg IV q8h). There was not a statistically significant difference in urine volume over 24 hours between methods; however, urine volume was significantly greater after CRI compared with IA during the first 8 hours ([median 25th percentile, 75th percentile]: 9.6 L [8.9, 14.4] for CRI versus 5.9 L [5.3, 6.0] for IA). CRI produced a more uniform urine flow, decreased fluctuations in plasma volume, and suppressed renal concentrating ability throughout the infusion period. Potassium, Ca, and Cl excretion was greater during CRI than IA (1,133 mmol [1.110, 1,229] versus 764 mmol [709, 904], 102.7 mmol [96.0, 117.2] versus 73.3 mmol [65.0, 73.5], and 1,776 mmol [1,657, 2.378] versus 1,596 mmol [1,457, 1,767], respectively). Elimination half-lives of furosemide were 1.35 and 0.47 hours for CRI and IA, respectively. The area under the excretion rate curve was 1,285.7 and 184.2 mL x mg/mL for CRI and IA, respectively. Furosemide CRI (0.12 mg/kg/h) for 8 hours, preceded by a loading dose (0.12 mg/kg), is recommended when profound diuresis is needed acutely in horses. 相似文献
18.
B. Cinar Kul N. Bilgen J.A. Lenstra O. Korkmaz Agaoglu B. Akyuz O. Ertugrul 《Zeitschrift für Tierzüchtung und Züchtungsbiologie》2015,132(6):449-453
Genetic variations in chromosome Y are enabling researchers to identify paternal lineages, which are informative for introgressions and migrations. In this study, the male‐specific region markers, sex‐determining region‐Y (SRY), amelogenin (AMELY) and zinc finger (ZFY) were analysed in seven Turkish native goat breeds, Angora, Kilis, Hair, Honaml?, Norduz, Gürcü and Abaza. A SNP in the ZFY gene defined a new haplotype Y2C. All domestic haplogroups originate from Capra aegagrus, while the finding of Y1A, Y1B, Y2A and Y2C in 32, 4, 126 and 2 Turkish domestic goats, respectively, appears to indicate a predomestic origin of the major haplotypes. The occurrence of four haplotypes in the Hair goat and, in contrast, a frequency of 96% of Y1A in the Kilis breed illustrate that Y‐chromosomal variants have a more breed‐dependent distribution than mitochondrial or autosomal DNA. This probably reflects male founder effects, but a role in adaptation cannot be excluded. 相似文献
19.
Ling GV Thurmond MC Choi YK Franti CE Ruby AL Johnson DL 《Journal of veterinary internal medicine / American College of Veterinary Internal Medicine》2003,17(6):817-823
The objective of this report was to characterize 20-year changes in proportion of calcium oxalate (CaOx) calculi and struvite calculi in dogs, and associations with breed, age, and sex. In this retrospective study, results of analysis of urinary calculi from dogs were reviewed for specimens received between July 1, 1981, and December 31, 2001. Breed, sex, age, year of submission of the specimen, and mineral type(s) were analyzed statistically. CaOx or Struvite or both were contained in 18,966 of 20,884 (91%) specimens. For both sexes, a 20-year statistically significant increase was observed in the proportion of calculus specimens that contained CaOx. The increase in this proportion was greater in females (1% to 31%) than in males (18% to 82%). From 1998 to 2001, when proportions may have plateaued, the odds of specimens containing CaOx were markedly higher in 18 breeds, markedly lower in 5 breeds, and not significantly different in 13 breeds compared with crossbreds. For both sexes, a 20-year statistically significant decrease was observed in the proportion of calculus specimens that contained struvite. This decrease in proportion was greater for males (79-16%) than for females (97-68%). From 1998 to 2001, when proportions plateaued, the odds of calculi containing struvite were markedly lower in 20 breeds, markedly higher in 1 breed, and not significantly different in 15 breeds when compared with crossbreds. Breed, age, and sex were associated statistically with CaOx or struvite urolithiasis. In conclusion, there appears to have been a long-term increase in the proportion of specimens of canine urinary calculi that contain CaOx as well as a long-term decrease in the proportion of specimens of calculi that contain struvite for both male and female dogs. The rate of change appeared to begin leveling off in the period 1998 to 2001. The recent proportion of dogs with either CaOx- or struvite-associated urolithiasis may depend on breed, age, and sex, and on interactions among these 3 factors. 相似文献
20.
<正>1.INTRODUCTION Ensuring transportation network security is one Of the most daunting challenges confronting homeland security agencies today.Significant research has been dedicated.To model and analyze the vulnerability of transportation systems,while notably fewer studies propose specific strategies for deploying defensive technologies to safeguard these systems. 相似文献