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Development of a colloidal gold immunochromatographic strip for the rapid detection of soft-shelled turtle systemic septicemia spherical virus.

Posted by on in 2015
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Zhang L1Li D2Liu L3Fang J3Xu R3Zhang G4. 2015. J Virol Methods. 221:39-45. doi: 10.1016/j.jviromet.2015.04.016. Epub 2015 Apr 22.

1School of Marine Sciences, Ningbo University, Fenghua Road, Ningbo, Zhejiang 315211, PR China. Electronic address: zhangliping821@126.com.
2School of Marine Sciences, Ningbo University, Fenghua Road, Ningbo, Zhejiang 315211, PR China. Electronic address: lidengfeng@nbu.edu.cn.
3School of Marine Sciences, Ningbo University, Fenghua Road, Ningbo, Zhejiang 315211, PR China.
4College of Biological Science and Technology, Hunan Agriculture University, Nongda Road, Changsha, Hunan 410128, PR China.

Abstract

A colloidal gold immunochromatographic strip (ICS) test based on a competitive format was developed for the rapid detection of soft-shelled turtle systemic septicemia spherical virus (STSSSV) in turtle and fecal samples. Specific egg yolk antibodies (IgY) against STSSSV were labeled with colloidal gold and used as probes in the one-step test strip. Antigen (STSSSV) and goat anti-chicken IgY were drawn on the nitrocellulose membrane as the test line and control line, respectively. When STSSSV standard samples (0-100μg/mL) were detected by the strips, the visual limit of detection (LOD) was found to be 50.0μg/mL. The ICS test showed high stability; the strips were stable for at least 3 months at 4°C without significant loss of activity. There was no obvious cross-reactivity with other aquatic pathogens. The assay can be performed within 5-10min. Analysis of STSSSV in turtle samples revealed that data obtained from the ICS test were in a good agreement with those obtained by ELISA. The positive results of fecal samples suggested that this method could be used to detect STSSSV while protecting the animals' welfare. The ICS assay does not need specialized equipment or a technician and can be used as a reliable, rapid, cost-effective and convenient qualitative tool for on-site diagnosis.

Copyright © 2015 Elsevier B.V. All rights reserved.

KEYWORDS:

Egg yolk antibody (IgY); Gold nanoparticle; Immunochromatographic strip; Soft-shelled turtle systemic septicemia spherical virus (STSSSV)

PMID:
 
25913728
 
[PubMed - in process]
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