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Analytical Comparison of In Vitro-Spiked Human Serum and Plasma for PCR-Based Detection of Aspergillus fumigatus DNA: a Study by the European Aspergillus PCR Initiative.

Identifieur interne : 002F42 ( PubMed/Checkpoint ); précédent : 002F41; suivant : 002F43

Analytical Comparison of In Vitro-Spiked Human Serum and Plasma for PCR-Based Detection of Aspergillus fumigatus DNA: a Study by the European Aspergillus PCR Initiative.

Auteurs : Juergen Loeffler [Allemagne] ; Carlo Mengoli [Italie] ; Jan Springer [Allemagne] ; Stéphane Bretagne [France] ; Manuel Cuenca-Estrella [Espagne] ; Lena Klingspor [Suède] ; Katrien Lagrou [Belgique] ; Willem J G. Melchers [Pays-Bas] ; C Oliver Morton [Australie] ; Rosemary A. Barnes [Royaume-Uni] ; J Peter Donnelly [Pays-Bas] ; P Lewis White [Royaume-Uni]

Source :

RBID : pubmed:26085614

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English descriptors

Abstract

The use of serum or plasma for Aspergillus PCR testing facilitates automated and standardized technology. Recommendations for serum testing are available, and while serum and plasma are regularly considered interchangeable for use in fungal diagnostics, differences in galactomannan enzyme immunoassay (GM-EIA) performance have been reported and are attributed to clot formation. Therefore, it is important to assess plasma PCR testing to determine if previous recommendations for serum are applicable and also to compare analytical performance with that of serum PCR. Molecular methods testing serum and plasma were compared through multicenter distribution of quality control panels, with additional studies to investigate the effect of clot formation and blood fractionation on DNA availability. Analytical sensitivity and time to positivity (TTP) were compared, and a regression analysis was performed to identify variables that enhanced plasma PCR performance. When testing plasma, sample volume, preextraction-to-postextraction volume ratio, PCR volume, duplicate testing, and the use of an internal control for PCR were positively associated with performance. When whole-blood samples were spiked and then fractionated, the analytical sensitivity and TTP were superior when testing plasma. Centrifugation had no effect on DNA availability, whereas the presence of clot material significantly lowered the concentration (P = 0.028). Technically, there are no major differences in the molecular processing of serum and plasma, but the formation of clot material potentially reduces available DNA in serum. During disease, Aspergillus DNA burdens in blood are often at the limits of PCR performance. Using plasma might improve performance while maintaining the methodological simplicity of serum testing.

DOI: 10.1128/JCM.00906-15
PubMed: 26085614


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Le document en format XML

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<div type="abstract" xml:lang="en">The use of serum or plasma for Aspergillus PCR testing facilitates automated and standardized technology. Recommendations for serum testing are available, and while serum and plasma are regularly considered interchangeable for use in fungal diagnostics, differences in galactomannan enzyme immunoassay (GM-EIA) performance have been reported and are attributed to clot formation. Therefore, it is important to assess plasma PCR testing to determine if previous recommendations for serum are applicable and also to compare analytical performance with that of serum PCR. Molecular methods testing serum and plasma were compared through multicenter distribution of quality control panels, with additional studies to investigate the effect of clot formation and blood fractionation on DNA availability. Analytical sensitivity and time to positivity (TTP) were compared, and a regression analysis was performed to identify variables that enhanced plasma PCR performance. When testing plasma, sample volume, preextraction-to-postextraction volume ratio, PCR volume, duplicate testing, and the use of an internal control for PCR were positively associated with performance. When whole-blood samples were spiked and then fractionated, the analytical sensitivity and TTP were superior when testing plasma. Centrifugation had no effect on DNA availability, whereas the presence of clot material significantly lowered the concentration (P = 0.028). Technically, there are no major differences in the molecular processing of serum and plasma, but the formation of clot material potentially reduces available DNA in serum. During disease, Aspergillus DNA burdens in blood are often at the limits of PCR performance. Using plasma might improve performance while maintaining the methodological simplicity of serum testing.</div>
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<ELocationID EIdType="doi" ValidYN="Y">10.1128/JCM.00906-15</ELocationID>
<Abstract>
<AbstractText>The use of serum or plasma for Aspergillus PCR testing facilitates automated and standardized technology. Recommendations for serum testing are available, and while serum and plasma are regularly considered interchangeable for use in fungal diagnostics, differences in galactomannan enzyme immunoassay (GM-EIA) performance have been reported and are attributed to clot formation. Therefore, it is important to assess plasma PCR testing to determine if previous recommendations for serum are applicable and also to compare analytical performance with that of serum PCR. Molecular methods testing serum and plasma were compared through multicenter distribution of quality control panels, with additional studies to investigate the effect of clot formation and blood fractionation on DNA availability. Analytical sensitivity and time to positivity (TTP) were compared, and a regression analysis was performed to identify variables that enhanced plasma PCR performance. When testing plasma, sample volume, preextraction-to-postextraction volume ratio, PCR volume, duplicate testing, and the use of an internal control for PCR were positively associated with performance. When whole-blood samples were spiked and then fractionated, the analytical sensitivity and TTP were superior when testing plasma. Centrifugation had no effect on DNA availability, whereas the presence of clot material significantly lowered the concentration (P = 0.028). Technically, there are no major differences in the molecular processing of serum and plasma, but the formation of clot material potentially reduces available DNA in serum. During disease, Aspergillus DNA burdens in blood are often at the limits of PCR performance. Using plasma might improve performance while maintaining the methodological simplicity of serum testing.</AbstractText>
<CopyrightInformation>Copyright © 2015 Loeffler et al.</CopyrightInformation>
</Abstract>
<AuthorList CompleteYN="Y">
<Author ValidYN="Y">
<LastName>Loeffler</LastName>
<ForeName>Juergen</ForeName>
<Initials>J</Initials>
<AffiliationInfo>
<Affiliation>Würzburg University, Würzburg, Germany loeffler_j@ukw.de.</Affiliation>
</AffiliationInfo>
</Author>
<Author ValidYN="Y">
<LastName>Mengoli</LastName>
<ForeName>Carlo</ForeName>
<Initials>C</Initials>
<AffiliationInfo>
<Affiliation>University of Padua, Padua, Italy.</Affiliation>
</AffiliationInfo>
</Author>
<Author ValidYN="Y">
<LastName>Springer</LastName>
<ForeName>Jan</ForeName>
<Initials>J</Initials>
<AffiliationInfo>
<Affiliation>Würzburg University, Würzburg, Germany.</Affiliation>
</AffiliationInfo>
</Author>
<Author ValidYN="Y">
<LastName>Bretagne</LastName>
<ForeName>Stéphane</ForeName>
<Initials>S</Initials>
<AffiliationInfo>
<Affiliation>Paris Diderot University, Saint Louis Hospital-APHP, Paris, France.</Affiliation>
</AffiliationInfo>
</Author>
<Author ValidYN="Y">
<LastName>Cuenca-Estrella</LastName>
<ForeName>Manuel</ForeName>
<Initials>M</Initials>
<AffiliationInfo>
<Affiliation>Spanish National Centre for Microbiology, Instituto de Salud Carlos III, Madrid, Spain.</Affiliation>
</AffiliationInfo>
</Author>
<Author ValidYN="Y">
<LastName>Klingspor</LastName>
<ForeName>Lena</ForeName>
<Initials>L</Initials>
<AffiliationInfo>
<Affiliation>Karolinska University Hospital, Stockholm, Sweden.</Affiliation>
</AffiliationInfo>
</Author>
<Author ValidYN="Y">
<LastName>Lagrou</LastName>
<ForeName>Katrien</ForeName>
<Initials>K</Initials>
<AffiliationInfo>
<Affiliation>National Reference Center for Mycosis, University Hospitals Leuven, Leuven, Belgium Department of Microbiology and Immunology, KU Leuven, Leuven, Belgium.</Affiliation>
</AffiliationInfo>
</Author>
<Author ValidYN="Y">
<LastName>Melchers</LastName>
<ForeName>Willem J G</ForeName>
<Initials>WJ</Initials>
<AffiliationInfo>
<Affiliation>Radboud University Medical Centre, Nijmegen, The Netherlands.</Affiliation>
</AffiliationInfo>
</Author>
<Author ValidYN="Y">
<LastName>Morton</LastName>
<ForeName>C Oliver</ForeName>
<Initials>CO</Initials>
<AffiliationInfo>
<Affiliation>University of Western Sydney, Sydney, NSW, Australia.</Affiliation>
</AffiliationInfo>
</Author>
<Author ValidYN="Y">
<LastName>Barnes</LastName>
<ForeName>Rosemary A</ForeName>
<Initials>RA</Initials>
<AffiliationInfo>
<Affiliation>Cardiff University, UHW, Cardiff, United Kingdom.</Affiliation>
</AffiliationInfo>
</Author>
<Author ValidYN="Y">
<LastName>Donnelly</LastName>
<ForeName>J Peter</ForeName>
<Initials>JP</Initials>
<AffiliationInfo>
<Affiliation>Radboud University Medical Centre, Nijmegen, The Netherlands.</Affiliation>
</AffiliationInfo>
</Author>
<Author ValidYN="Y">
<LastName>White</LastName>
<ForeName>P Lewis</ForeName>
<Initials>PL</Initials>
<AffiliationInfo>
<Affiliation>Public Health Wales Microbiology Cardiff, Cardiff, United Kingdom.</Affiliation>
</AffiliationInfo>
</Author>
<Author ValidYN="Y">
<CollectiveName>European Aspergillus PCR Initiative</CollectiveName>
</Author>
</AuthorList>
<Language>eng</Language>
<PublicationTypeList>
<PublicationType UI="D003160">Comparative Study</PublicationType>
<PublicationType UI="D023362">Evaluation Studies</PublicationType>
<PublicationType UI="D016428">Journal Article</PublicationType>
<PublicationType UI="D016448">Multicenter Study</PublicationType>
<PublicationType UI="D013485">Research Support, Non-U.S. Gov't</PublicationType>
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<ArticleDate DateType="Electronic">
<Year>2015</Year>
<Month>06</Month>
<Day>17</Day>
</ArticleDate>
</Article>
<MedlineJournalInfo>
<Country>United States</Country>
<MedlineTA>J Clin Microbiol</MedlineTA>
<NlmUniqueID>7505564</NlmUniqueID>
<ISSNLinking>0095-1137</ISSNLinking>
</MedlineJournalInfo>
<ChemicalList>
<Chemical>
<RegistryNumber>0</RegistryNumber>
<NameOfSubstance UI="D004271">DNA, Fungal</NameOfSubstance>
</Chemical>
</ChemicalList>
<CitationSubset>IM</CitationSubset>
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<MeshHeadingList>
<MeshHeading>
<DescriptorName UI="D001228" MajorTopicYN="N">Aspergillosis</DescriptorName>
<QualifierName UI="Q000175" MajorTopicYN="Y">diagnosis</QualifierName>
<QualifierName UI="Q000382" MajorTopicYN="N">microbiology</QualifierName>
</MeshHeading>
<MeshHeading>
<DescriptorName UI="D001232" MajorTopicYN="N">Aspergillus fumigatus</DescriptorName>
<QualifierName UI="Q000235" MajorTopicYN="N">genetics</QualifierName>
<QualifierName UI="Q000302" MajorTopicYN="Y">isolation & purification</QualifierName>
</MeshHeading>
<MeshHeading>
<DescriptorName UI="D004271" MajorTopicYN="N">DNA, Fungal</DescriptorName>
<QualifierName UI="Q000097" MajorTopicYN="Y">blood</QualifierName>
</MeshHeading>
<MeshHeading>
<DescriptorName UI="D006801" MajorTopicYN="N">Humans</DescriptorName>
</MeshHeading>
<MeshHeading>
<DescriptorName UI="D008954" MajorTopicYN="N">Models, Biological</DescriptorName>
</MeshHeading>
<MeshHeading>
<DescriptorName UI="D025202" MajorTopicYN="N">Molecular Diagnostic Techniques</DescriptorName>
<QualifierName UI="Q000379" MajorTopicYN="Y">methods</QualifierName>
</MeshHeading>
<MeshHeading>
<DescriptorName UI="D010949" MajorTopicYN="N">Plasma</DescriptorName>
<QualifierName UI="Q000382" MajorTopicYN="Y">microbiology</QualifierName>
</MeshHeading>
<MeshHeading>
<DescriptorName UI="D016133" MajorTopicYN="N">Polymerase Chain Reaction</DescriptorName>
<QualifierName UI="Q000379" MajorTopicYN="Y">methods</QualifierName>
</MeshHeading>
<MeshHeading>
<DescriptorName UI="D012680" MajorTopicYN="N">Sensitivity and Specificity</DescriptorName>
</MeshHeading>
<MeshHeading>
<DescriptorName UI="D013048" MajorTopicYN="N">Specimen Handling</DescriptorName>
<QualifierName UI="Q000379" MajorTopicYN="Y">methods</QualifierName>
</MeshHeading>
<MeshHeading>
<DescriptorName UI="D013997" MajorTopicYN="N">Time Factors</DescriptorName>
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<OtherID Source="NLM">PMC4540929</OtherID>
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<Month>04</Month>
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<Year>2015</Year>
<Month>06</Month>
<Day>12</Day>
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<ArticleId IdType="pii">JCM.00906-15</ArticleId>
<ArticleId IdType="doi">10.1128/JCM.00906-15</ArticleId>
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<li>France</li>
<li>Italie</li>
<li>Pays-Bas</li>
<li>Royaume-Uni</li>
<li>Suède</li>
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<li>Bavière</li>
<li>Communauté de Madrid</li>
<li>District de Basse-Franconie</li>
<li>Gueldre</li>
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<li>Île-de-France</li>
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<li>Wurtzbourg</li>
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<name sortKey="Bretagne, Stephane" sort="Bretagne, Stephane" uniqKey="Bretagne S" first="Stéphane" last="Bretagne">Stéphane Bretagne</name>
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<region name="Communauté de Madrid">
<name sortKey="Cuenca Estrella, Manuel" sort="Cuenca Estrella, Manuel" uniqKey="Cuenca Estrella M" first="Manuel" last="Cuenca-Estrella">Manuel Cuenca-Estrella</name>
</region>
</country>
<country name="Suède">
<region name="Svealand">
<name sortKey="Klingspor, Lena" sort="Klingspor, Lena" uniqKey="Klingspor L" first="Lena" last="Klingspor">Lena Klingspor</name>
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<name sortKey="Melchers, Willem J G" sort="Melchers, Willem J G" uniqKey="Melchers W" first="Willem J G" last="Melchers">Willem J G. Melchers</name>
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