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首页> 外文期刊>Journal of Clinical Microbiology >Evaluation of the OptiMAL Test for Rapid Diagnosis of Plasmodium vivax and Plasmodium falciparum Malaria
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Evaluation of the OptiMAL Test for Rapid Diagnosis of Plasmodium vivax and Plasmodium falciparum Malaria

机译:快速诊断间日疟和恶性疟原虫疟疾的最佳试验的评价

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The development of rapid and specific diagnostic tests to identify individuals infected with malaria is of paramount importance in efforts to control the severe public health impact of this disease. This study evaluated the ability of a newly developed rapid malaria diagnostic test, OptiMAL (Flow Inc., Portland, Oreg.), to detect Plasmodium vivax and Plasmodium falciparum malaria during an outbreak in Honduras. OptiMAL is a rapid (10-min) malaria detection test which utilizes a dipstick coated with monoclonal antibodies against the intracellular metabolic enzyme parasite lactate dehydrogenase (pLDH). Differentiation of malaria parasites is based on antigenic differences between the pLDH isoforms. Since pLDH is produced only by live Plasmodium parasites, this test has the ability to differentiate live from dead organisms. Results from the OptiMAL test were compared to those obtained by reading 100 fields of traditional Giemsa-stained thick-smear blood films. Whole-blood samples were obtained from 202 patients suspected of having malaria. A total of 96 samples (48%) were positive by blood films, while 91 (45%) were positive by the OptiMAL test. The blood films indicated that 82% (79 of 96) of the patients were positive for P. vivax and 18% (17 of 96) were infected with P. falciparum. The OptiMAL test showed that 81% (74 of 91) were positive for P. vivaxand 19% (17 of 91) were positive for P. falciparum. These results demonstrated that the OptiMAL test had sensitivities of 94 and 88% and specificities of 100 and 99%, respectively, when compared to traditional blood films for the detection of P. vivax andP. falciparum malaria. Blood samples not identified by OptiMAL as malaria positive normally contained parasites at concentrations of less than 100/μl of blood. Samples found to containP. falciparum were further tested by two other commercially available rapid malaria diagnostic tests, ParaSight-F (Becton Dickinson, Cockeysville, Md.) and ICT Malaria P.f. (ICT Diagnostics, Sydney, Australia), both of which detect only P. falciparum. Only 11 of the 17 (65%) P. falciparum-positive blood samples were identified by the ICT and ParaSight-F tests. Thus, OptiMAL correctly identified P. falciparum malaria parasites in patient blood samples more often than did the other two commercially available diagnostic tests and showed an excellent correlation with traditional blood films in the identification of both P. vivax malaria and P. falciparum malaria. We conclude that the OptiMAL test is an effective tool for the rapid diagnosis of malaria.
机译:在控制这种疾病对公众健康的严重影响方面,开发快速而具体的诊断测试以识别感染疟疾的人至关重要。这项研究评估了新开发的快速疟疾快速诊断测试OptiMAL(Flow Inc.,俄勒冈州波特兰)在一次疟疾中检测间日疟原虫和恶性疟原虫的能力。洪都拉斯爆发。 OptiMAL是一项快速(10分钟)疟疾检测测试,它使用涂有针对细胞内代谢酶寄生虫乳酸脱氢酶(pLDH)的单克隆抗体的量油尺。疟原虫的分化是基于pLDH同工型之间的抗原差异。由于pLDH仅由活的

Plasmodium 寄生虫产生,因此该测试具有区分活的和死的生物的能力。将OptiMAL测试的结果与通过读取100场传统Giemsa染色的厚涂血膜获得的结果进行比较。从202名怀疑患有疟疾的患者中获取了全血样本。总共96个样本(48%)的血膜呈阳性,而91个样本(45%)的OptiMAL测试呈阳性。血膜表明82%(96/79)患者的 P阳性。间质感染和18%(96个中的17个)感染了 P。恶心。 OptiMAL测试显示81%(91中的74)对 P呈阳性。间日间和19%(91个中的17个)的 P阳性。恶心。这些结果表明,与用于检测 P的传统血膜相比,OptimAL测试的灵敏度分别为94%和88%,特异性分别为100%和99%。 vivax P。恶性疟疾。 OptiMAL未将其识别为疟疾阳性的血液样本通常含有浓度低于100 /μl血液的寄生虫。样品中含有 P。恶性疟原虫还通过其他两种商业上可快速获得的疟疾快速诊断测试,即ParaSight-F(马里兰州科基斯维尔的Becton Dickinson)和ICT疟疾公司进行了测试。 (ICT Diagnostics,澳大利亚悉尼),两者都仅检测 P。恶心。 17个(65%)P中只有11个。通过ICT和ParaSight-F测试鉴定出恶性疟原虫阳性血样。因此,Optimal正确识别了 P。与其他两种市售诊断测试相比,患者血液样本中的恶性疟原虫疟疾发病率更高,并且在两种 P的鉴定中均显示出与传统血膜的极佳相关性。间日疟疟疾和 P。恶性疟疾。我们得出的结论是,OptimAL测试是快速诊断疟疾的有效工具。

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