Article (Scientific journals)
Detection of small amounts of human adenoviruses in stools: comparison of a new immuno real-time PCR assay with classical tools.
Bonot, Sebastian; Ogorzaly, Leslie; Elmoualij, Benaïssa et al.
2014In Clinical Microbiology and Infection, 20 (12), p. 1-7
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Keywords :
Adenovirus; Immuno-PCR; Stools
Abstract :
[en] The detection of low virus concentrations in biological matrices, especially stool samples, is facing significant limitations as far as common diagnostic methods (enzyme-linked-immunosorbent assay (ELISA) or quantitative real-time PCR (qPCR)) are considered. Here the development of a new immuno real-time PCR (iPCR) is described and its performance in the detection of human adenoviruses (HAdVs) in spiked stools is compared with those of ELISA and qPCR assays. For the iPCR, detection of the sandwich formed by the complexation of capture antibody-antigen-detection antibody was performed by qPCR thanks to the substitution of peroxydase by a chimeric DNA. This modification increased the detection sensitivity 200-fold compared to ELISA. The direct qPCR results revealed that only 0.3–9.5% of the spiked HAdV were detectable, resulting from important losses of DNA occurring at the extraction step. This step was not necessary in the iPCR workflow, avoiding this drawback. The losses of viral particles occurred at the elution step from the stool only. The recovery rate of the iPCR was thus better and ranged between 21 and 54%. As a result, iPCR enabled the detection of lower virus concentrations in stool samples compared to those detected by ELISA and qPCR. The iPCR could be considered as a ‘hyper sensitive ELISA’ for early detection of HAdV infections, especially in the case of immunocompromised patients after haematopoietic stem cell transplant.
Disciplines :
Biochemistry, biophysics & molecular biology
Author, co-author :
Bonot, Sebastian
Ogorzaly, Leslie
Elmoualij, Benaïssa ;  Université de Liège - ULiège > Département des sciences biomédicales et précliniques > Histologie
Zorzi, Willy ;  Université de Liège - ULiège > Département des sciences biomédicales et précliniques > Histologie
Cauchie, Henry-Michel ;  Université de Liège - ULiège > DER Sc. et gest. de l'environnement (Arlon Campus Environ.) > DER Sc. et gest. de l'environnement (Arlon Campus Environ.)
Language :
English
Title :
Detection of small amounts of human adenoviruses in stools: comparison of a new immuno real-time PCR assay with classical tools.
Publication date :
12 December 2014
Journal title :
Clinical Microbiology and Infection
ISSN :
1198-743X
eISSN :
1469-0691
Publisher :
Blackwell Science, Oxford, United Kingdom
Special issue title :
Detection of small amounts of human adenoviruses in stools: comparison of a new immuno real-time PCR assay with classical tools.
Volume :
20
Issue :
12
Pages :
1-7
Peer reviewed :
Peer Reviewed verified by ORBi
Name of the research project :
Projet Pathos. CNR Luxembourg
Available on ORBi :
since 20 January 2015

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