Electronic microarray assays for avian influenza and Newcastle disease virus.

Autor: Lung O; Canadian Food Inspection Agency, National Centres for Animal Disease, Lethbridge Laboratory, Township Road 9-1, P.O. Box 640, Lethbridge, Alberta T1J 3Z4, Canada. Oliver.Lung@inspection.gc.ca, Beeston A, Ohene-Adjei S, Pasick J, Hodko D, Hughes KB, Furukawa-Stoffer T, Fisher M, Deregt D
Jazyk: angličtina
Zdroj: Journal of virological methods [J Virol Methods] 2012 Nov; Vol. 185 (2), pp. 244-53. Date of Electronic Publication: 2012 Jul 13.
DOI: 10.1016/j.jviromet.2012.07.005
Abstrakt: Microarrays are suitable for multiplexed detection and typing of pathogens. Avian influenza virus (AIV) is currently classified into 16 H (hemagglutinin) and 9 N (neuraminidase) subtypes, whereas Newcastle disease virus (NDV) strains differ in virulence and are broadly classified into high and low pathogenicity types. In this study, three assays for detection and typing of poultry viruses were developed on an automated microarray platform: a multiplex assay for simultaneous detection of AIV and detection and pathotyping of NDV, and two separate assays for differentiating all AIV H and N subtypes. The AIV-NDV multiplex assay detected all strains in a 63 virus panel, and accurately typed all high pathogenicity NDV strains tested. A limit of detection of 10(1)-10(3) TCID(50)/mL and 200-400 EID(50)/mL was obtained for NDV and AIV, respectively. The AIV typing assays accurately typed all 41 AIV strains and a limit of detection of 4-200 EID(50)/mL was obtained. Assay validation showed that the microarray assays were generally comparable to real-time RT-PCR. However, the AIV typing microarray assays detected more positive clinical samples than the AIV matrix real-time RT-PCR, and also provided information regarding the subtype. The AIV-NDV multiplex and AIV H typing microarray assays detected mixed infections and could be useful for detection and typing of AIV and NDV.
(Crown Copyright © 2012. Published by Elsevier B.V. All rights reserved.)
Databáze: MEDLINE
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