prec Search Results


human saliva  (Lee Biosolutions)
93
Lee Biosolutions human saliva
Human Saliva, supplied by Lee Biosolutions, used in various techniques. Bioz Stars score: 93/100, based on 1 PubMed citations. ZERO BIAS - scores, article reviews, protocol conditions and more
https://www.bioz.com/result/human saliva/product/Lee Biosolutions
Average 93 stars, based on 1 article reviews
human saliva - by Bioz Stars, 2026-04
93/100 stars
  Buy from Supplier
saliva collected pre covid  (Lee Biosolutions)
94
Lee Biosolutions saliva collected pre covid
Saliva Collected Pre Covid, 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/saliva collected pre covid/product/Lee Biosolutions
Average 94 stars, based on 1 article reviews
saliva collected pre covid - by Bioz Stars, 2026-04
94/100 stars
  Buy from Supplier
protein standards  (Bio-Rad)
97
Bio-Rad protein standards
Protein Standards, supplied by Bio-Rad, used in various techniques. Bioz Stars score: 97/100, based on 1 PubMed citations. ZERO BIAS - scores, article reviews, protocol conditions and more
https://www.bioz.com/result/protein standards/product/Bio-Rad
Average 97 stars, based on 1 article reviews
protein standards - by Bioz Stars, 2026-04
97/100 stars
  Buy from Supplier
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, 2026-04
94/100 stars
  Buy from Supplier
precision plus protein dual color standards  (Bio-Rad)
99
Bio-Rad precision plus protein dual color standards
Precision Plus Protein Dual Color Standards, supplied by Bio-Rad, used in various techniques. Bioz Stars score: 99/100, based on 1 PubMed citations. ZERO BIAS - scores, article reviews, protocol conditions and more
https://www.bioz.com/result/precision plus protein dual color standards/product/Bio-Rad
Average 99 stars, based on 1 article reviews
precision plus protein dual color standards - by Bioz Stars, 2026-04
99/100 stars
  Buy from Supplier
prec δlaci plasmid  (Addgene inc)
91
Addgene inc prec δlaci plasmid
Prec δlaci Plasmid, supplied by Addgene inc, used in various techniques. Bioz Stars score: 91/100, based on 1 PubMed citations. ZERO BIAS - scores, article reviews, protocol conditions and more
https://www.bioz.com/result/prec δlaci plasmid/product/Addgene inc
Average 91 stars, based on 1 article reviews
prec δlaci plasmid - by Bioz Stars, 2026-04
91/100 stars
  Buy from Supplier
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, 2026-04
94/100 stars
  Buy from Supplier
human nasal fluid  (Lee Biosolutions)
91
Lee Biosolutions human nasal fluid
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 .
Human Nasal Fluid, supplied by Lee Biosolutions, used in various techniques. Bioz Stars score: 91/100, based on 1 PubMed citations. ZERO BIAS - scores, article reviews, protocol conditions and more
https://www.bioz.com/result/human nasal fluid/product/Lee Biosolutions
Average 91 stars, based on 1 article reviews
human nasal fluid - by Bioz Stars, 2026-04
91/100 stars
  Buy from Supplier
normal prostate epithelial cells  (Lonza)
90
Lonza normal prostate epithelial cells
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 .
Normal Prostate Epithelial Cells, supplied by Lonza, 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/normal prostate epithelial cells/product/Lonza
Average 90 stars, based on 1 article reviews
normal prostate epithelial cells - by Bioz Stars, 2026-04
90/100 stars
  Buy from Supplier
normal primary prostate epithelial cell (prec)  (Cambrex)
90
Cambrex normal primary prostate epithelial cell (prec)
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 .
Normal Primary Prostate Epithelial Cell (Prec), 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/normal primary prostate epithelial cell (prec)/product/Cambrex
Average 90 stars, based on 1 article reviews
normal primary prostate epithelial cell (prec) - by Bioz Stars, 2026-04
90/100 stars
  Buy from Supplier
normal fetal prostate epithelial cells (prec cells;  (Lonza)
90
Lonza normal fetal prostate epithelial cells (prec cells;
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 .
Normal Fetal Prostate Epithelial Cells (Prec Cells;, supplied by Lonza, 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/normal fetal prostate epithelial cells (prec cells;/product/Lonza
Average 90 stars, based on 1 article reviews
normal fetal prostate epithelial cells (prec cells; - by Bioz Stars, 2026-04
90/100 stars
  Buy from Supplier
prec medium  (Lonza)
90
Lonza prec medium
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 .
Prec Medium, supplied by Lonza, 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/prec medium/product/Lonza
Average 90 stars, based on 1 article reviews
prec medium - by Bioz Stars, 2026-04
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