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<title lang=en>Evaluation of Toxoplasma ELITe MGB Real-Time PCR Assay for Diagnosis of Toxoplasmosis</title>
<creator>Robert-Gangneux, Florence</creator>
<creator>Brenier-Pinchart, Marie-Pierre</creator>
<creator>Yera, Hélène</creator>
<creator>Belaz, Sorya</creator>
<creator>Varlet-Marie, Emmanuelle</creator>
<creator>Bastien, Patrick</creator>
<contributor>Service de Parasitologie-Mycologie [Rennes] ; Université de Rennes 1 (UR1) - Hôpital Pontchaillou - CHU Pontchaillou [Rennes]</contributor>
<contributor>Institut de recherche, santé, environnement et travail [Rennes] (Irset) ; Université d'Angers (UA) - Université des Antilles et de la Guyane (UAG) - Université de Rennes 1 (UR1) - École des Hautes Études en Santé Publique [EHESP] (EHESP) - Institut National de la Santé et de la Recherche Médicale (INSERM) - Structure Fédérative de Recherche en Biologie et Santé de Rennes ( Biosit : Biologie - Santé - Innovation Technologique )</contributor>
<contributor>Centre National de référence de la Toxoplasmose (CNRT)</contributor>
<contributor>Institut Albert Bonniot</contributor>
<contributor>CHU Grenoble</contributor>
<contributor>Service de parasitologie-mycologie [CHU Cochin] ; Assistance publique - Hôpitaux de Paris (AP-HP) - CHU Cochin [AP-HP]</contributor>
<contributor>Laboratoire de Parasitologie-Mycologie, Montpellier (MIVEGEC) ; Centre National de la Recherche Scientifique (CNRS) - Institut de recherche pour le développement [IRD] : UR224 - Centre Hospitalier Régional Universitaire [Montpellier] (CHRU Montpellier) - Université Montpellier 2 - Sciences et Techniques (UM2) - Université Montpellier 1 (UM1) - Université de Montpellier (UM)</contributor>
<contributor>Institut de Veille Sanitaire (InVS)</contributor>
<contributor>Centre National de Référence de la Toxoplasmose</contributor>
<description>International audience</description>
<source>ISSN: 0095-1137</source>
<source>Journal of Clinical Microbiology</source>
<publisher>American Society for Microbiology</publisher>
<identifier>hal-01526432</identifier>
<identifier>https://hal-univ-rennes1.archives-ouvertes.fr/hal-01526432</identifier>
<identifier>https://hal-univ-rennes1.archives-ouvertes.fr/hal-01526432/document</identifier>
<identifier>https://hal-univ-rennes1.archives-ouvertes.fr/hal-01526432/file/Evaluation%20of%20the%20Toxoplasma.pdf</identifier>
<source>https://hal-univ-rennes1.archives-ouvertes.fr/hal-01526432</source>
<source>Journal of Clinical Microbiology, American Society for Microbiology, 2017, 55 (5), pp.1369-1376. 〈10.1128/JCM.02379-16〉</source>
<identifier>DOI : 10.1128/JCM.02379-16</identifier>
<relation>info:eu-repo/semantics/altIdentifier/doi/10.1128/JCM.02379-16</relation>
<identifier>PUBMED : 28202794</identifier>
<relation>info:eu-repo/semantics/altIdentifier/pmid/28202794</relation>
<language>en</language>
<subject lang=en> Toxoplasma gondii</subject>
<subject lang=en> toxoplasmosis</subject>
<subject lang=en>Diagnosis</subject>
<subject lang=en> PCR</subject>
<subject lang=en> rep529</subject>
<subject>[SDV.MHEP.MI] Life Sciences [q-bio]/Human health and pathology/Infectious diseases</subject>
<subject>[SDV.IB] Life Sciences [q-bio]/Bioengineering</subject>
<subject>[SDV.MP.PAR] Life Sciences [q-bio]/Microbiology and Parasitology/Parasitology</subject>
<type>info:eu-repo/semantics/article</type>
<type>Journal articles</type>
<description lang=en>Molecular diagnosis of congenital toxoplasmosis or disseminated toxoplasmosis is based mainly on PCR. The repeated DNA element rep529 has become the main DNA target used in most PCR methods, whether laboratory developed or commercial. In this multicenter study, we evaluated the Toxoplasma ELITe MGB (Elitech) commercial kit by comparison with three reference quantitative PCR assays (RAs) used routinely in three proficient laboratories of the French National Reference Center for Toxoplasmosis network, using Toxoplasma calibrated suspensions diluted to obtain a range of concentrations from 0.1 to 10,000 parasites/ml. These suspensions were extracted with either the DNA extraction kit (EXTRAblood; Elitech) recommended by the manufacturer or the QIAamp DNA minikit (Qiagen). The Toxoplasma ELITe MGB assay was also evaluated on a panel of 128 clinical samples, including 56 amniotic fluid samples, 55 placenta samples, and various other samples, of which 95 originated from patients with proven toxoplasmosis. The ELITe MGB assay amplified low-concentration replicates (<10 parasites/ml) of calibrated suspensions less frequently than the RAs of 2/3 laboratories. Additionally, the combination of EXTRAblood and Toxoplasma ELITe MGB yielded poorer sensitivity than the combination of QIAamp DNA minikit and ELITe MGB for low parasite concentrations (P < 0.001 for 1 parasite/ml). On clinical samples, the sensitivity and the specificity of the commercial assay were 89% and 100%, respectively. The sensitivity ranged from 79% (placenta samples) to 100% (amniotic fluid samples). Overall, this study shows that the Toxoplasma ELITe MGB assay is suitable for the diagnosis of toxoplasmosis from non-cell-rich or non-hemoglobin-rich samples and that the EXTRAblood kit is not optimal.</description>
<date>2017</date>
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