prec1 Search Results


sars cov  (Lee Biosolutions)
94
Lee Biosolutions sars cov
Sars Cov, supplied by Lee Biosolutions, used in various techniques. Bioz Stars score: 94/100, based on 1 PubMed citations. ZERO BIAS - scores, article reviews, protocol conditions and more
https://www.bioz.com/result/sars cov/product/Lee Biosolutions
Average 94 stars, based on 1 article reviews
sars cov - by Bioz Stars, 2026-03
94/100 stars
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sars cov 2 particles  (Lee Biosolutions)
94
Lee Biosolutions sars cov 2 particles
Clinical false-positive rate of antigen rapid diagnostic tests (Ag-RDTs) among participants in a coronavirus disease 2019 (COVID-19) household-transmission field study and subsequent laboratory evaluation of technical false-positive rates among Ag-RDT strip lots. A , The biweekly clinical false-positive rate for nasal swab Ag-RDT, defined as a positive Ag-RDT at the same timepoint as negative results by reverse-transcription quantitative polymerase chain reaction (RT-qPCR) in saliva, nasal swabs, and oropharyngeal swab specimens. The proportions displayed below each month represent the number of clinical false-positive results over the total number of false-positive and true-negative Ag-RDT results in the field study during each period. Error bars represent 95% confidence interval (CI). B , Laboratory evaluation of the technical false-positive rate for 4 Ag-RDT strip lots was performed using severe acute respiratory syndrome coronavirus 2 <t>(SARS-CoV-2)–negative</t> human nasal fluid (see Methods). The proportion of technical false-positive reads to all reads by readers blinded to experimental conditions is displayed below each lot number. P values were obtained using an upper-tailed Fisher exact test. Additional details are provided in .
Sars Cov 2 Particles, supplied by Lee Biosolutions, used in various techniques. Bioz Stars score: 94/100, based on 1 PubMed citations. ZERO BIAS - scores, article reviews, protocol conditions and more
https://www.bioz.com/result/sars cov 2 particles/product/Lee Biosolutions
Average 94 stars, based on 1 article reviews
sars cov 2 particles - by Bioz Stars, 2026-03
94/100 stars
  Buy from Supplier
prec1  (Cambrex)
90
Cambrex prec1
Clinical false-positive rate of antigen rapid diagnostic tests (Ag-RDTs) among participants in a coronavirus disease 2019 (COVID-19) household-transmission field study and subsequent laboratory evaluation of technical false-positive rates among Ag-RDT strip lots. A , The biweekly clinical false-positive rate for nasal swab Ag-RDT, defined as a positive Ag-RDT at the same timepoint as negative results by reverse-transcription quantitative polymerase chain reaction (RT-qPCR) in saliva, nasal swabs, and oropharyngeal swab specimens. The proportions displayed below each month represent the number of clinical false-positive results over the total number of false-positive and true-negative Ag-RDT results in the field study during each period. Error bars represent 95% confidence interval (CI). B , Laboratory evaluation of the technical false-positive rate for 4 Ag-RDT strip lots was performed using severe acute respiratory syndrome coronavirus 2 <t>(SARS-CoV-2)–negative</t> human nasal fluid (see Methods). The proportion of technical false-positive reads to all reads by readers blinded to experimental conditions is displayed below each lot number. P values were obtained using an upper-tailed Fisher exact test. Additional details are provided in .
Prec1, supplied by Cambrex, used in various techniques. Bioz Stars score: 90/100, based on 1 PubMed citations. ZERO BIAS - scores, article reviews, protocol conditions and more
https://www.bioz.com/result/prec1/product/Cambrex
Average 90 stars, based on 1 article reviews
prec1 - by Bioz Stars, 2026-03
90/100 stars
  Buy from Supplier

Image Search Results


Clinical false-positive rate of antigen rapid diagnostic tests (Ag-RDTs) among participants in a coronavirus disease 2019 (COVID-19) household-transmission field study and subsequent laboratory evaluation of technical false-positive rates among Ag-RDT strip lots. A , The biweekly clinical false-positive rate for nasal swab Ag-RDT, defined as a positive Ag-RDT at the same timepoint as negative results by reverse-transcription quantitative polymerase chain reaction (RT-qPCR) in saliva, nasal swabs, and oropharyngeal swab specimens. The proportions displayed below each month represent the number of clinical false-positive results over the total number of false-positive and true-negative Ag-RDT results in the field study during each period. Error bars represent 95% confidence interval (CI). B , Laboratory evaluation of the technical false-positive rate for 4 Ag-RDT strip lots was performed using severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2)–negative human nasal fluid (see Methods). The proportion of technical false-positive reads to all reads by readers blinded to experimental conditions is displayed below each lot number. P values were obtained using an upper-tailed Fisher exact test. Additional details are provided in .

Journal: Open Forum Infectious Diseases

Article Title: Laboratory Evaluation Links Some False-Positive COVID-19 Antigen Test Results Observed in a Field Study to a Specific Lot of Test Strips

doi: 10.1093/ofid/ofac701

Figure Lengend Snippet: Clinical false-positive rate of antigen rapid diagnostic tests (Ag-RDTs) among participants in a coronavirus disease 2019 (COVID-19) household-transmission field study and subsequent laboratory evaluation of technical false-positive rates among Ag-RDT strip lots. A , The biweekly clinical false-positive rate for nasal swab Ag-RDT, defined as a positive Ag-RDT at the same timepoint as negative results by reverse-transcription quantitative polymerase chain reaction (RT-qPCR) in saliva, nasal swabs, and oropharyngeal swab specimens. The proportions displayed below each month represent the number of clinical false-positive results over the total number of false-positive and true-negative Ag-RDT results in the field study during each period. Error bars represent 95% confidence interval (CI). B , Laboratory evaluation of the technical false-positive rate for 4 Ag-RDT strip lots was performed using severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2)–negative human nasal fluid (see Methods). The proportion of technical false-positive reads to all reads by readers blinded to experimental conditions is displayed below each lot number. P values were obtained using an upper-tailed Fisher exact test. Additional details are provided in .

Article Snippet: We created contrived specimens using heat-inactivated SARS-CoV-2 particles (BEI, catalog number NR-52286, lot 70034991) spiked into commercial SARS-CoV-2–negative human nasal fluid (Lee BioSolutions, catalog number 991-13-P, lot 03f4044 and catalog number 991-13-P-PreC, lot 09F3280) at concentrations above and below the inferred limit of detection (LOD) for this assay (7 × 10 copies/mL) [ ] and applied them to 2 lots of test strips (152194 and 152532) that did not yield any false-positive results among participants in the field study.

Techniques: Diagnostic Assay, Transmission Assay, Stripping Membranes, Real-time Polymerase Chain Reaction, Quantitative RT-PCR