酶联免疫方法检测粪便幽门螺杆菌抗原的评价

目的：评价酶联免疫方法检测粪便幽门螺杆菌抗原（Helicobacter pylori antigen,HpAg)的可靠性和准确性。方法：应用双抗体夹心酶联免疫吸附试验（ELISA）检测Hp感染可疑者140例的粪便标本中的HpAg,同时与其它3种常用的临床诊断方法[组织切片染色镜检、发离培养，快速脲酶试验（Rapid Urease Test,RUT)]进行比较评价。结果：ELISA检测粪便HpAg阳性率（84．3％）与其它3种方法的阳性率差异无显著性。诊断敏感度和特异性分别为98．3％和83．3％，阳性预期值96．6％，阴性预期值90．9％，总有效率95．7％，结论：ELISA检测粪便HpAg感染简便易行，敏感性和特异性均较高，无创伤性，值得推广。     

酶免疫法检测粪便幽门螺杆菌抗原

目的 探讨酶免疫测定法检测幽门螺杆菌粪便抗原（ＨｐＳＡ）在诊断幽门螺杆菌（Ｈｐ）感染中的价值。方法 用酶免疫测定法检测６３例患者粪便标本ＨｐＳＡ,其中６１例同时进行＾１３Ｃ－尿素呼气试验（＾１３Ｃ－ＵＢＴ）,且３１例患者也采用组织学方法进行检查。以＾１３Ｃ－ＵＢＴ作为金标准,对酶免疫测定法和组织学方法进行初步评价。结果酶免疫测定法的敏感性为９４．７％,特异性为９５．７％,准确性为９４．１％,阳性预     

粪便抗原检测对幽门螺杆菌感染的诊断价值

目的：研究幽门螺杆菌粪便抗原（HpSA）检测诊断幽门螺杆菌（HP）感染的临床应用价值。方法：采用ELISA法检测98例因上消化道症状接受胃镜检查病人的HpSA,同时进行细菌培养,快速尿素酶试验和^14C－尿素呼气试验检查。将后三项检查中二项阳性或细菌培养一项阳性作为诊断HP感染的金标准。结果：金标准诊断HP感染,阳性54例,阴性44例。金标准阳性的54例中,HpSA检测阳性为51例,阴性为3例;金标准阴性的44例中,HpSA检测阴性为42例,阳性为2例。HpSA检测诊断HP感染的敏感度94．4％（51／54）,特异度95．5％（42／44）,准确度94．9％（93／98）,阳性预测值96．2％（51／53）,阴性预测值93．3％（42／45）。结论：HpSA检测有较高的敏感性和特异性,是一种简便可靠,非侵入性的诊断HP感染的方法,易于临床推广。     

幽门螺杆菌粪便抗原快速免疫卡检测幽门螺杆菌粪便抗原的临床评价

目的:探讨幽门螺杆菌粪便抗原(HpSA)快速免疫卡检测HpSA,诊断幽门螺杆菌(Hp)现症感染和Hp根除疗效观察的准确性和可靠性.方法:收集61例有上消化道症状患者的粪便标本用HpSA快速免疫卡检测HpSA诊断Hp感染,同时采用胃黏膜组织学染色和14C-尿素呼气试验(14C-UBT)"金标准"作对照.32例Hp阳性的患者采用抗Hp根除治疗,停药6~8周后留取粪便标本进行HpSA测定,14C-UBT作对照.结果:61例患者"金标准"诊断Hp阳性49例,阴性12例;HpSA检测阳性51例,阴性10例,假阳性2例,与"金标准"比较,其敏感性为100%,特异性为83.3%.32例Hp阳性临床治疗患者,停药6~8周后14C-UBT诊断Hp阳性10例,阴性22例,HpSA检测阳性12例,阴性20例.免疫卡检测HpSA用于临床疗效观察效果与14C-UBT法比较,kappa值为0.862>0.75,具有高度一致性.结论:HpSA快速免疫卡是一种准确、简便、快捷的非侵入性Hp感染的检测方法,可用于临床诊断Hp现症感染和抗Hp疗效观察.     

粪便幽门螺杆菌抗原检测试验实用性及临床价值分析

目的 分析粪便幽门螺杆菌抗原(HpSA)检测试验的实用性和临床价值.方法 选择有上消化道症状的患者208例作为研究对象,同时采用14C尿素酶呼气试验(14C-UBT)和HpSA检测试验分析患者幽门螺杆菌(Hp)感染情况,以14C-UBT的检测结果作为诊断标准,分析HpSA检测试验诊断Hp感染的价值.结果 HpSA检测试验与14C-UBT检测结果的阳性率差异无统计学意义(χ2=0.161,P=0.688).两种方法的一致性强(Kappa=0.84).HpSA检测试验有较高的阳性预测值、阴性预测值、灵敏度、特异度和准确度,分别为95.16％、88.10％、92.19％、92.50％、92.31％.结论 HpSA检测试验准确性良好,具有无创、经济、检测速度快等优点.该方法适用于基层医院进行Hp感染的筛查、复查和流行病学调查,亦适用于儿童、老年人Hp感染的检查.     

酶免法检测粪便幽门螺杆菌抗原评价

[目的]探讨酶免法检测粪便幽门螺杆菌抗原(HpSA)在诊断幽门螺杆菌感染中的应用价值。[方法]酶免疫检测法检测66例临床患者的粪便标本，并同时做快速尿素酶(RUT)检测，组织学Warthin starry银染法检测。以两种方法进行评价，对酶免疫法检测粪便HpSA进行初步探讨评价。[结果]评价方法1中，酶免疫检测法的敏感性为95．1％，特异性为92％，准确性为93．9％，阳性预测值为95．1％，阴性预测值为92．0％。评价方法2中，酶免疫检测法的敏感性为91．2％，特异性为95．2％，准确性为92．7％，阳性预测值为96．9％，阴性预测值为86．9％。[结论]酶免疫法检测粪便HpSA有较高的敏感性、特异性。方法简便、易行，是HD感染诊断、筛查及疗效观察的理想方法之一。     

酶免法检测健康儿童粪便中幽门螺杆菌特异性抗原

目前 ,Ｈ .ｐｙｌｏｒｉ(幽门螺杆菌 ,Ｈｐ)在我国成年人群的感染率为 5 0 %以上 ,儿童的感染率也日趋上升 ,约为 2 0 %。酶免法是体外检测粪便中Ｈｐ的定性方法 ,可直接检测抗原 ,留取标本方便 ,无创伤性 ,适合儿童 ,老人与不宜做胃镜检查的患者。我们用此法对 78例 3ｙ～ 18ｙ健康少年儿童进行了初检 ,阳性率达 2 3 1%(18/ 78) ,现报告如下。1　材料方法1 1　检查对象　 74名 6 ｙ～18ｙ健康学生随机抽样选自北京市西城区 5所中小学在校学生 ,4例 6岁以下儿童选自儿科门诊患者 ,男 40例 ,女 38例 ,平均年龄 10 6ｙ。1 2　试剂　幽门螺杆…     

两种不同抗原在幽门螺杆菌临床诊断中的比较

采用Sephadex－G200凝胶层析和酸性甘氨酸提取法，制备了两组不同的HP抗原，并分别以此为包被抗原，用SPA－ELISA方法检测了经临床生物学特性鉴定，确定为HP感染的阳性标本26例，阴性标本18例。结果以Sephadex－G200凝胶层析和酸性甘氨酸提取的抗原，对HP感染的阳性检出率分别为92％和62％。提示以Sephadex－G200凝胶层析提纯的抗原，在幽门螺杆菌临床诊断中的特异性明显优于酸性甘氨酸提取的抗原。     

粪便幽门螺杆菌抗原半定量检测

目的 建立幽门螺杆菌抗原(Hp-Ag)检测的半定量方法,探索Hp-Ag半定量检测结果与胃部幽门螺杆菌(Hp)感染菌量的关系,并就其诊断效能与其他Hp的检测方法进行比较评价.方法 使用胶体金免疫层析分析仪测定H p阳性者条带的灰度值作为半定量的依据;纳入363例消化内科患者和体检健康者,探讨测定其粪便Hp-Ag半定量检测...     

儿童粪便幽门螺杆菌抗原检测的临床应用

目的：对粪便幽门螺杆茵抗原(Hpsa)检测诊断儿童HP感染的应用和价值进行探讨。方法：选择有消化道症状的82例儿童为研究对象，以快速尿素酶试验(RUT)，组织学切片(改良Giemsa)联合检测为诊断标准，采用ELISA法检测患儿的Hpsa。结果：在82例患儿中HPSA检测诊断HP感染敏感性、特异性和准确性分别为94．74％，90．91％，92．68％。结论：Hpsa检测是一种简便、准确的诊断儿童HP感染的方法。     

Evaluation of a near-patient fecal antigen test for the assessment of Helicobacter pylori status

The assessment of Helicobacter pylori antigen in stool specimens is widely accepted. Recently a immunochromatographic near-patient test assay has been developed. In this first evaluation in 100 patients before and after H. pylori eradication therapy we observed a sensitivity (76%) and specificity (98%) of this near-patient test.     

Helicobacter pylori stool antigen test

In Japan, Helicobacter pylori stool antigen(HpSA) test was opened for diagnosis of H. pylori infection before and after eradication therapy form Nov. 1, 2003. We can use two kinds of HpSA kits, Premier Platinum HpSA(Meridian Bioscience, USA) and Testmate pylori antigen EIA(Wakamoto Pharmaceutical Co., Ltd., Japan). We evaluated the diagnostic accuracy of the HpSA test(Premier Platinum HpSA) compared with diagnosis based on endoscopic biopsy-based methods. In 136 patients, the sensitivity and specificity of the HpSA test before therapy were 98.3% and 95.0%, respectively. In 54 patients, the sensitivity and specificity of the HpSA test after eradication therapy were 90% and 97.7%, respectively. Therefore, it is concluded that the HpSA test is a useful method for the diagnosis of H. pylori infection before and after eradication therapy.     

Evaluation of the ELISA test for detection of Entamoeba histolytica in feces

The clinical utility of an ELISA test with monoclonal antibodies to detect antigen of Entamoeba histolytica in feces was evaluated in 150 patients with gastrointestinal symptoms. Each subject was examined by rectosigmoidoscopy with rectal smear and/or a triple stool search for ova-bacteria-parasite (OBP); in addition, one stool sample was collected for the ELISA test. All the tests were independent and double blind. E. histolytica was detected by OBP and/or rectosigmoidoscopy in 66 patients; 61 patients had other parasites; and in 23, no parasites were identified. Of all patients, 116 were positive for the ELISA test. Of these, E. histolytica was identified in 52. In 47, other parasites were identified and in 17, no parasites were found. The ELISA test with a monoclonal antibody against E. histolytica antigen showed higher sensitivity than the standard diagnostic methods: the ability to detect the presence of E. histolytica antigen regardless of the destruction of the parasite or of the error due to misidentification of the parasite resulting from faulty preparation of the samples.     

环介导等温扩增技术检测粪便幽门螺杆菌方法的建立及应用

目的:建立一种快速、简单的检测粪便幽门螺杆菌的环介导等温扩增方法(loop-medi atedisotherma lamplification,LAMP)。方法:针对幽门螺杆菌的16SrRNA基因设计4条特异性引物(2条内引物和2条外引物),优化反应条件后,对方法的敏感性、特异性进行评估,并评估检测粪便模拟标本的敏感性。结果:使用LAMP方法可以在2h内得到检测结果,加入染料后阳性结果为绿色,电泳后有明显的阶梯状条带。幽门螺杆菌的基因组DNA检测敏感性为12pg,是普通PCR的10倍,对模拟粪便标本进行检测,检测限为102CFU/mL。金黄色葡萄球菌、大肠埃希菌、铜绿假单胞菌、粪肠球菌的检测结果均为阴性。结论:本研究建立的检测幽门螺杆菌的LAMP方法敏感性高、特异性强,操作简单,不需要特殊设备,是一种很有前景的检测方法。     

Stool antigen tests for the detection of Helicobacter pylori in children

Stool specimens from 102 children (median age = 6.0 years; Helicobacter pylori in biopsy specimens, n = 43) were tested for H. pylori with the monoclonal antibody-based enzyme immunoassay HpStar. In 28 cases, the specimen was obtained with a rectal cotton swab during endoscopy. The sensitivity and specificity of the HpStar were 0.95 and 0.90, respectively, as compared with biopsy-based methods. The rectal cotton swab specimen gave accurate results in 24 of the 28 cases. Storage of specimens for 1, 3, or 7 days (n = 6) had a minor effect on the results, but one specimen's originally positive value on borderline turned negative when it was kept in room temperature. Forty-eight specimens were tested in parallel with all 3 tests used: HpStar, Premium Platinum HpSA, and the rapid test ImmunoCardSTAT! The accuracy rates of the tests were 98% for the HpSA and HpStar and 96% for the ImmunoCardSTAT! The performance of the stool antigen tests was excellent in young children.     

ELISA法检测粪便幽门螺杆菌抗原的应用研究

目的 探讨ELISA法在粪便标本中幽门螺杆菌抗原(HPSA)诊断的实用价值。方法 经胃镜组织学法诊断的62例胃病患者,在未经治疗前取其粪便标本,采用ELISA法进行HPSA的检测。结果 以组织学法为金标准,ELISA的敏感性为89.4％,特异性为86.7％,准确性为93.6％,阳性预测值为95.4％,阴性预测值为72.2％。结论 ELISA 法测定HPSA具有较高的敏感性和特异性,方法简便、快速,取材方便,无痛性,尤其适于儿童、老人及体弱者,且对疗效能进行有效的跟踪检测。     

A method of detecting the rotavirus antigen in feces

Counter-current immunoelectrophoresis (CCIEP) has been employed for indication of a rotaviral antigen. 50% feces homogenate in physiologic saline, clarified by centrifugation, has been used in the test, as well as a highly active antiserum of rabbits immunized with calf diarrhea (Nebraska strain) rotavirus. The results of parallel studies of 103 feces samples collected from children with acute gastroenteritis, carried out by CCIEP and electron microscopy, coincided in 84.5% of cases. The authors have examined the rotaviral antigen detection rate in children and adults suffering from acute gastroenteritis and in subjects who have had contacts with them; they have analyzed the periods when the antigen could be isolated from the feces and the relationship between the antigen detection rate, the patients' sex, and season. CCIEP is recommended to be widely employed for the detection of the rotaviral antigen in feces.