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COVID-19 serological survey using micro blood sampling
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Journal Article
COVID-19 serological survey using micro blood sampling
2021
Overview
During August 2020, we carried out a serological survey among students and employees at the Okinawa Institute of Science and Technology Graduate University (OIST), Japan, testing for the presence of antibodies against SARS-CoV-2, the causative agent of COVID-19. We used a FDA-authorized 2-step ELISA protocol in combination with at-home self-collection of blood samples using a custom low-cost finger prick-based capillary blood collection kit. Although our survey did not find any COVID-19 seropositive individuals among the OIST cohort, it reliably detected all positive control samples obtained from a local hospital and excluded all negatives controls. We found that high serum antibody titers can persist for more than 9 months post infection. Among our controls, we found strong cross-reactivity of antibodies in samples from a serum pool from two MERS patients in the anti-SARS-CoV-2-S ELISA. Here we show that a centralized ELISA in combination with patient-based capillary blood collection using as little as one drop of blood can reliably assess the seroprevalence among communities. Anonymous sample tracking and an integrated website created a stream-lined procedure. Major parts of the workflow were automated on a liquid handler, demonstrating scalability. We anticipate this concept to serve as a prototype for reliable serological testing among larger populations.
Publisher
Nature Publishing Group UK,Nature Publishing Group,Nature Portfolio
Subject
/ Blood
/ Blood Specimen Collection - instrumentation
/ Blood Specimen Collection - methods
/ Coronavirus Infections - blood
/ Coronavirus Infections - immunology
/ COVID-19
/ COVID-19 Serological Testing - methods
/ Enzyme-Linked Immunosorbent Assay
/ Humanities and Social Sciences
/ Humans
/ Science
/ Serology
/ Severe acute respiratory syndrome coronavirus 2
/ Spike Glycoprotein, Coronavirus - genetics
/ Spike Glycoprotein, Coronavirus - isolation & purification
