Detection of influenza A virus in swine nasal swab samples with a wash-free magnetic bioassay and a handheld giant magnetoresistance sensing system

Diqing Su, Kai Wu, Venkatramana D. Krishna, Todd Klein, Jinming Liu, Yinglong Feng, Andres M. Perez, Maxim C.J. Cheeran, Jian Ping Wang

Research output: Contribution to journalArticlepeer-review

19 Scopus citations

Abstract

The dissemination of Influenza A virus (IAV) throughout the world has become one of the main concerns for the health of both animals and human beings. An efficient and sensitive diagnostic tool is thus needed for the early detection of IAV. Here, we developed a wash-free magnetic bioassay and further integrated it with a handheld platform based on giant-magnetoresistance (GMR) sensors. The wash-free magnetic bioassay significantly accelerates and simplifies the detection process. This brand-new system was successful in detecting both IAV nucleoprotein and IAV-contained nasal swab samples from pigs on the farm. The limit of detection (LOD) is 0.3 nM for IAV nucleoprotein and 250 TCID50/mL for IAV-spiked nasal swab samples. The detection of nasal swab samples containing unpurified IAV was also performed, demonstrating the capability of the magnetic wash-free assay in the detection of biomarkers in complex sample matrix.

Original languageEnglish (US)
Article number1077
JournalFrontiers in Microbiology
Volume10
Issue numberMAY
DOIs
StatePublished - 2019

Bibliographical note

Funding Information:
This work is supported by MNDrive: OVPR STEMMA program, Institute of Engineering in Medicine of the University of Minnesota, College of Veterinary Medicine Emerging, Zoonotic and Infectious Diseases Signature Program, USDA-NIFA, SAES Funds (Project No. MIN-62-097), National Science Foundation MRSEC facility program, the Distinguished McKnight University Professorship, Centennial Chair Professorship, Robert Hartmann Chair Professorship,

Funding Information:
This work is supported by MNDrive: OVPR STEMMA program, Institute of Engineering in Medicine of the University of Minnesota, College of Veterinary Medicine Emerging, Zoonotic and Infectious Diseases Signature Program, USDA-NIFA, SAES Funds (Project No. MIN-62-097), National Science Foundation MRSEC facility program, the Distinguished McKnight University Professorship, Centennial Chair Professorship, Robert Hartmann Chair Professorship, and UROP program from the University of Minnesota. Parts of this work were carried out in the Characterization Facility

Publisher Copyright:
Copyright © 2019 Su, Wu, Krishna, Klein, Liu, Feng, Perez, Cheeran and Wang. This is an open-access article distributed under the terms of the Creative Commons Attribution License (CC BY). The use, distribution or reproduction in other forums is permitted, provided the original author(s) and the copyright owner(s) are credited and that the original publication in this journal is cited, in accordance with accepted academic practice. No use, distribution or reproduction is permitted which does not comply with these terms.

Keywords

  • Giant magnetoresistance
  • Handheld
  • Influenza A virus
  • Magnetic bioassay
  • Nasal swab sample
  • On-site diagnosis
  • Wash-free

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