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10.1016/j.snb.2021.130347

http://scihub22266oqcxt.onion/10.1016/j.snb.2021.130347
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suck abstract from ncbi


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pmid34188360      Sens+Actuators+B+Chem 2021 ; 345 (ä): 130347
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  • Nanoparticle transfer biosensors for the non-invasive detection of SARS-CoV-2 antigens trapped in surgical face masks #MMPMID34188360
  • Vaquer A; Alba-Patino A; Adrover-Jaume C; Russell SM; Aranda M; Borges M; Mena J; Del Castillo A; Socias A; Martin L; Arellano MM; Agudo M; Gonzalez-Freire M; Besalduch M; Clemente A; Baron E; de la Rica R
  • Sens Actuators B Chem 2021[Oct]; 345 (ä): 130347 PMID34188360show ga
  • Detecting SARS-CoV-2 antigens in respiratory tract samples has become a widespread method for screening new SARS-CoV-2 infections. This requires a nasopharyngeal swab performed by a trained healthcare worker, which puts strain on saturated healthcare services. In this manuscript we describe a new approach for non-invasive COVID-19 diagnosis. It consists of using mobile biosensors for detecting viral antigens trapped in surgical face masks worn by patients. The biosensors are made of filter paper containing a nanoparticle reservoir. The nanoparticles transfer from the biosensor to the mask on contact, where they generate colorimetric signals that are quantified with a smartphone app. Sample collection requires wearing a surgical mask for 30 min, and the total assay time is shorter than 10 min. When tested in a cohort of 27 patients with mild or no symptoms, an area under the receiving operating curve (AUROC) of 0.99 was obtained (96.2 % sensitivity and 100 % specificity). Serial measurements revealed a high sensitivity and specificity when masks were worn up to 6 days after diagnosis. Surgical face masks are inexpensive and widely available, which makes this approach easy to implement anywhere. The excellent sensitivity, even when tested with asymptomatic patient samples, along with the mobile detection scheme and non-invasive sampling procedure, makes this biosensor design ideal for mass screening.
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