Dengue virus, a Flaviviridae family member, has emerged as a major worldwide health concern, making its early diagnosis imperative. Lateral flow immunoassays have been widely employed for point-of-care diagnosis of dengue because of their rapid naked eye readouts, ease of use, and cost-effectiveness. However, they entail a drawback of low sensitivity, limiting their usage in clinical applications. Herein, we report a novel lateral flow immunoassay for detection of dengue leveraging on the benefits of gold decorated graphene oxide sheets as detection labels and a tapered nitrocellulose membrane. The developed assay allows for rapid (10 min) and sensitive detection of dengue NS1 with a detection limit of 4.9 ng mL−1, ∼11-fold improvement over the previously reported values. Additionally, the clinical application of the developed assay has been demonstrated by testing it for dengue virus spiked in human serum. The reported lateral flow immunoassay shows significant promise for early and rapid detection of several target diseases.
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Research Article|
May 14 2018
Tapered lateral flow immunoassay based point-of-care diagnostic device for ultrasensitive colorimetric detection of dengue NS1
Sanjay Kumar
;
Sanjay Kumar
1
Microsystems Fabrication Laboratory, Department of Mechanical Engineering, Indian Institute of Technology Kanpur, Kanpur
, Uttar Pradesh 208016, India
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Pulak Bhushan
;
Pulak Bhushan
1
Microsystems Fabrication Laboratory, Department of Mechanical Engineering, Indian Institute of Technology Kanpur, Kanpur
, Uttar Pradesh 208016, India
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Vinay Krishna;
Vinay Krishna
2
Department of Cardiology, LPS Institute of Cardiology, G.S.V.M. Medical College
, Kanpur, Uttar Pradesh 208016, India
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Shantanu Bhattacharya
Shantanu Bhattacharya
a)
1
Microsystems Fabrication Laboratory, Department of Mechanical Engineering, Indian Institute of Technology Kanpur, Kanpur
, Uttar Pradesh 208016, India
3
Design Programme, Indian Institute of Technology Kanpur, Kanpur
, Uttar Pradesh 208016, India
a)Author to whom correspondence should be addressed: bhattacs@iitk.ac.in Tel: +91-512-2596056 (Office)
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a)Author to whom correspondence should be addressed: bhattacs@iitk.ac.in Tel: +91-512-2596056 (Office)
Biomicrofluidics 12, 034104 (2018)
Article history
Received:
April 13 2018
Accepted:
April 30 2018
Citation
Sanjay Kumar, Pulak Bhushan, Vinay Krishna, Shantanu Bhattacharya; Tapered lateral flow immunoassay based point-of-care diagnostic device for ultrasensitive colorimetric detection of dengue NS1. Biomicrofluidics 1 May 2018; 12 (3): 034104. https://doi.org/10.1063/1.5035113
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