共查询到19条相似文献，搜索用时 125 毫秒
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在快速间接ＥＬＩＳＡ中将被检血清样品和酶结合物一起保温，即简化了操作步骤，又比常规ＥＬＩＳＡ缩短了３０－９０分钟。通过对猪旋毛虫病阴阳性血清检测，表明该方法敏感性为９３．６２％，特异性为９６．８８％。为猪旋毛虫病提供了一种快速诊断方法。 相似文献
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猪旋毛虫病4种检测方法的比较 总被引：2，自引：0，他引：2
目的 试验比较快速试纸条法、快速ELISA法、常规镜检法和人工胃液消化法检测猪旋毛虫病效果。方法 采用上述4种方法分别对1566头屠宰猪作旋毛虫病的检测。结果 旋毛虫检出率分别为1．66％、1．66％、1．21％和1．60％。结论 快速试纸条法具有特异、敏感、快速、简便的特点，用于现场检测可收到立等可取的效果。 相似文献
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应用斑点酶联免疫吸附试验诊断猪旋毛虫病的研究 总被引：1，自引：1，他引：1
利用差速离心,TritonX-100处理,超速离心,在国内首次制得旋毛虫S_3抗原,其抗原性优于ES抗原。用该抗原建立诊断猪旋毛虫病的Dot-ELISA比常规ELISA敏感,与猪囊虫血清、猪弓形虫血清无交叉反应。对70份感染猪旋毛虫的阳性血清进行Dot-ELISA和常规ELISA检测,分别检出68份和66份,阳性符合率分别为97.1％和94.3％。对182份采自非疫区的被检仔猪血清进行检测,均末出现阳性,阴性符合率为100％。结果表明,Dot-ELISA除和常规ELISA一样具有敏感性高、特异性强、稳定性好等优点外,还具有快速简便的优点。 相似文献
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猪旋毛虫病快速检测试纸条的研制及特性测定 总被引：8，自引：0，他引：8
以旋毛虫重组分泌(excreting secretion．ES)抗原为基础,采用免疫金技术成功研制出旋毛虫病快速检测试纸条,试验结果显示试纸条与猪肺线虫、猪囊尾蚴、猪细颈囊尾蚴、猪米氏住肉孢子虫、猪蛔虫无交叉反应。证明旋毛虫病试纸条具有良好的特异性和敏感性,其敏感性与ELISA相当,与ELISA及消化法的检测结果符合率为100％。5min内肉眼观察获得结果,具有特异、敏感、快速、简单等特点,不需要任何专业技能和其他试剂。本方法的建立对猪旋毛虫病诊断和流行病学调查具有很大的应用价值。 相似文献
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旋毛虫病是人兽共患的寄生虫病。本病分布很广,几乎遍及世界各地,以欧洲及美国流行较为严重。我国屠宰猪旋毛虫病的检出率约为0.1～0.2%,某些地区高达2～7%,个别地区该病的发病率高达60～80%。为了解广东省部分地区猪群感染旋毛虫病的情况,作者应用 ELISA 方法对四个猪场和个体养猪户随机抽取4881头猪血清进行调查,现将结果报告如下。 相似文献
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旋毛虫病McAb快速ELISA诊断盒的研制与应用 总被引：7，自引：0，他引：7
本研究建立了ＭｃＡｂ快速诊断猪旋毛虫病的ＥＬＩＳＡ试剂盒，应用旋毛虫单克隆抗体系和层析纯化抗原（ＰＡＡ）与旋毛虫肌幼虫排泄－分泌抗（ＥＳ）作常规ＥＬＩＳＡ平行检测６１头人工感染旋毛虫病猪血样，阳性率均为１００％，检测健康猪血样１０８２头，阴性率也为１００％，检测疫区自然感染猪血样１２５３头，阳性率分别为１．４４％和１．１２％，随机抽采１７５头猪血样和肉样作旋毛虫病消化法，常规法和快速法对比试验，诊 相似文献
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本研究以纯化的原核表达的猪轮状病毒VP7抗原表位区域为抗原,建立了检测猪轮状病毒抗体的间接ELISA诊断方法。特异性试验表明,该抗原与其他7种常见猪病病毒（TGEV、PEDV、CSFV、PCV2、PRRSV、PPV、PrV）的阳性血清不发生交叉反应,批内和批间重复性试验的变异系数均小于10％;对来自不同猪场的血清的检测结果表明,该ELISA方法与中和试验检测结果符合率达94．8％。本试验建立的ELISA诊断方法具有良好的重复性、敏感性和特异性,为PRV的快速诊断、免疫猪群抗体监测和轮状病毒流行病学调查提供了一种快速、简便的血清学诊断方法。 相似文献
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Comparison of monoclonal antibody-based competitive and indirect enzyme-linked immunosorbent assays for the diagnosis of swine trichinosis 总被引：1，自引：0，他引：1
A competitive enzyme-linked immunosorbent assay (ELISA) for the detection of swine trichinosis has been developed using a biotinylated monoclonal antibody and an avidin-enzyme conjugate. The assay is based on competitive binding between swine serum antibodies and a monoclonal antibody specific for an antigenic determinant present on proteins from Trichinella spiralis excretory-secretory products with molecular weights of 45,000, 49,000, and 53,000. The competitive ELISA reliably detected pigs infected experimentally with T. spiralis and eliminated false-positive reactions in pigs infected with other swine nematodes, particularly Trichurus suis. When the competitive ELISA and an indirect ELISA using affinity-isolated antigen were compared using serum from pigs with naturally-acquired infections of T. spiralis, both tests were highly effective in detecting infected animals. 相似文献
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Field evaluation of the enzyme-linked immunosorbent assay for swine trichinosis: efficacy of the excretory-secretory antigen 总被引：6，自引：0，他引：6
K D Murrell W R Anderson G A Schad R D Hanbury K R Kazacos H R Gamble J Brown 《American journal of veterinary research》1986,47(5):1046-1049
A field evaluation of an enzyme-linked immunosorbent assay (ELISA) for swine trichinosis was done with sera obtained from 5 herds experiencing ongoing transmission of Trichinella spiralis. Epizootiologic studies conducted on these herds offered an opportunity to evaluate the accuracy of an ELISA, using larval T spiralis excretory-secretory antigens. Sera from 162 infected pigs and 143 serum samples from noninfected pigs originating from the same farms were tested. The infection status of the pigs was determined by digestion of diaphragm or tongue muscle samples. Two criteria were established to classify the ELISA optical density (OD) readings: Criterion I stated that an OD greater than or equal to 5 times the mean OD of several normal swine sera pools was positive; criterion II stated that a OD greater than or equal to 4 times the normal sera values was positive. The results obtained did not reveal obvious serologic variations among infected herds located in the 4 states involved. Overall, the test detected 93% (criterion I) and 96% (criterion II) of infected pigs. The majority of false-negative sera was from hogs that had less than 5 larvae/g of muscle; 1 hog had 73.8 larvae/g of diaphragm muscle. The false-positive rates were 8% for criterion I and 9% for criterion II. The actual rate for these false-positive samples may have been overestimated, because generally, only small tissue samples (0.4 to 10 g) were digested; larger sample sizes might have altered the results. The relevance of this qualification is that these pigs originated from herds with prevalence rates greater than 50%. Other factors that may account for occasional false-positive sera or false-negative sera in the swine trichinosis ELISA are discussed.(ABSTRACT TRUNCATED AT 250 WORDS) 相似文献
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H J Smith 《Canadian journal of veterinary research》1975,39(3):362-363
Pepsin digestion of the tail musculature of ten trichinous swine revealed from zero to 2,384 trichinae. The role of tail chewing in the transmission of trichinosis in swine is briefly discussed. 相似文献
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An excretory-secretory (ES) antigen was used in a serodiagnostic enzyme-linke immunosorbent assay (ELISA) for swine trichinosis. ELISA procedures included a double- antibody test, using either an anti-swine IgG or a protein A enzyme conjugate, and a triple-antibody test using a pig IgG heavy-chain specific second antibody with a conjugated third antibody. The ES antigen was effective in eliminating all false-positive reactivity in sera from farm-raised hogs. The triple-antibody procedure was more sensitive and demonstrated a greater efficiency in detecting positive animals and early seroconversions. Naturally-infected pigs with worm burdens as low as 0.01 larvae per gram (LPG) of diaphragm were seropositive using these procedures. Seroconversion in experimentally-infected animals receiving low doses of muscle larvae (500) occurred considerably later than in animals receiving high doses (10000). This might account for false-negative reactions in naturally-infected animals with very low (less than 0.1 LPG) worm burdens. 相似文献
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L Rice M K Frongillo J F Randolph 《Journal of the American Veterinary Medical Association》1990,197(4):480-482
Trichinella spiralis infection was identified by direct fecal examination as the cause of gastrointestinal disease in a dog. The source of infection was believed to be a woodchuck. Management included supportive care and benzimidazole treatment. Vomiting, diarrhea, anorexia, and myalgia are the main signs of trichinosis, but routine fecal examination seldom reveals T spiralis in natural infections. Mebendazole is the recommended anthelmintic and should be used to eliminate intestinal larvae and prevent muscle invasion. Although the prevalence of trichinosis is decreasing in swine, wild mammals may still be a potential source for dogs and cats. Nevertheless, because of the nonspecific clinical signs of trichinosis, many cases probably go undiagnosed. 相似文献
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Evaluation of the ELISA for the serological diagnosis of trichinosis in Canadian swine 总被引：10，自引：9，他引：1 
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下载免费PDF全文 H J Smith 《Canadian journal of veterinary research》1987,51(2):194-197
An ELISA using a Trichinella spiralis spiralis excretory-secretory antigen was evaluated as a procedure for the diagnosis of trichinosis in swine in Canada. Field and experimental trials were carried out using both indirect serological (ELISA) and direct parasitological (pepsin-digestion) methods concurrently on serum and musculature, respectively, from each animal. The ELISA is a sensitive and specific test for the detection of Trichinella antibodies in porcine sera when present. The development of Trichinella antibodies appears to be dependent on the magnitude of the infection established, age of the infection when the animal is tested and the immunocompetence or response to infection of individual animals. False negative reactions were recorded in both field and experimental trials. In the field study, five of the 1009 swine examined were parasitologically positive with light infections ranging from 0.01 to 0.046 larvae per gram (la/g) of musculature yet all were serologically negative. Experimentally it was shown that Trichinella antibodies develop slowly, at least two to three months postinfection, in pigs with very light infections. Even in pigs which developed infections of 33 to 55 la/g of musculature, seroconversion occurred greater than 23 and less than 30 days postinfection. The immunocompetence or response to infection of individual pigs was variable as illustrated by one pig inoculated with 3000 infective larvae which had consistently lower titers compared to others in the same group despite the establishment of a muscle infection of 8.5 la/g of musculature. One false positive reaction was recorded in the experimental trial in an animal which had received 100 larvae and seroconverted at about three months postinfection.(ABSTRACT TRUNCATED AT 250 WORDS) 相似文献
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A method was designed to evaluate and compare the microtitration agglutination test (MAT) and the enzyme-linked immunosorbent assay (ELISA) to detect antibodies in swine sera to Treponema hyodysenteriae and thereby establish a method for determining the prevalence of swine dysentery (SD) in herds. According to sampling criteria based on the hypergeometric distribution, sera were collected from 3 age groups of swine from farms having a history of SD on the premises (SD+) recently or being free of the disease (SD-). The highest degree of test sensitivity was obtained when sera from market age swine were evaluated with the ELISA. Of 14 SD+ herds from which sera were obtained from market-age swine, 13 were positive with the ELISA (93%); none of the 8 SD- herds was positive. The detection rates of individual swine in the SD+ herds for the 2 tests by age group were as follows: MAT--adult swine 1.4%, market-age swine 6%, and weaned pigs 0.8%; ELISA--adult swine 16%, market swine 31%, and weaned pigs 0.5%. 相似文献
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Evaluation of an enzyme-linked immunosorbent assay for detection of Eperythrozoon suis antibodies in swine. 总被引：17，自引：0，他引：17
F S Hsu M C Liu S M Chou J F Zachary A R Smith 《American journal of veterinary research》1992,53(3):352-354
An ELISA was developed and tested to detect antibodies to Eperythrozoon suis in swine. Results were compared with those of the indirect hemagglutination (IHA) test. Antigen isolated from swine heavily infected with E suis was used for both tests. Comparison of the ELISA with the IHA test revealed a significant (P less than 0.001) correlation between results. Of 114 samples obtained from 9 swine infected with E suis, 87.7% were seropositive (titer greater than or equal to 200) via the ELISA, and 80.7% were seropositive (titer greater than or equal to 20) via the IHA test. The sensitivity of the ELISA was greater than that of the IHA test. All blood samples obtained from specific-pathogen-free swine tested negative for E suis antibody. Cross-reactions were not observed between E suis antigen and antisera against various swine and cattle disease agents using ELISA. We concluded that the ELISA may be used for rapid and effective diagnosis of infection with E suis in swine. 相似文献