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A smartphone-based diagnostic platform for rapid detection of Zika, chikungunya, and dengue viruses

Journal Article · · Scientific Reports
DOI:https://doi.org/10.1038/srep44778· OSTI ID:1399884
 [1];  [1];  [2];  [1];  [1];  [1]
  1. Sandia National Lab. (SNL-CA), Livermore, CA (United States). Dept. of Biotechnology and Bioengineering
  2. Sandia National Lab. (SNL-CA), Livermore, CA (United States). Dept. of Systems Biology
Current multiplexed diagnostics for Zika, dengue, and chikungunya viruses are situated outside the intersection of affordability, high performance, and suitability for use at the point-of-care in resource-limited settings. Consequently, insufficient diagnostic capabilities are a key limitation facing current Zika outbreak management strategies. We demonstrate highly sensitive and specific detection of Zika, chikungunya, and dengue viruses by coupling reverse-transcription loop-mediated isothermal amplification (RT-LAMP) with our recently developed quenching of unincorporated amplification signal reporters (QUASR) technique. We conduct reactions in a simple, inexpensive and portable “LAMP box” supplemented with a consumer class smartphone. The entire assembly can be powered by a 5 V USB source such as a USB power bank or solar panel. The smartphone employs a novel algorithm utilizing chromaticity to analyze fluorescence signals, which improves the discrimination of positive/negative signals by 5-fold when compared to detection with traditional RGB intensity sensors or the naked eye. The ability to detect ZIKV directly from crude human sample matrices (blood, urine, and saliva) demonstrates our device’s utility for widespread clinical deployment. Altogether, these advances enable our system to host the key components necessary to expand the use of nucleic acid amplification-based detection assays towards point-of-care settings where they are needed most.
Research Organization:
Sandia National Laboratories (SNL-CA), Livermore, CA (United States)
Sponsoring Organization:
National Institutes of Health (NIH); USDOE National Nuclear Security Administration (NNSA)
Grant/Contract Number:
AC04-94AL85000
OSTI ID:
1399884
Alternate ID(s):
OSTI ID: 1510601
Report Number(s):
SAND2016--11988J; srep44778
Journal Information:
Scientific Reports, Journal Name: Scientific Reports Vol. 7; ISSN 2045-2322
Publisher:
Nature Publishing GroupCopyright Statement
Country of Publication:
United States
Language:
English

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