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Volume 27, Number 11—November 2021

Synopsis

Effectiveness of Abbott BinaxNOW Rapid Antigen Test for Detection of SARS-CoV-2 Infections in Outbreak among Horse Racetrack Workers, California, USA

Krishna SurasiComments to Author , Kristin J. Cummings, Carl Hanson, Mary Kate Morris, Maria Salas, David Seftel, Liza Ortiz, Ruwan Thilakaratne, Cameron Stainken, and Debra A. Wadford
Author affiliations: Centers for Disease Control and Prevention, Atlanta, Georgia, USA (K. Surasi); California Department of Public Health, Richmond, California, USA (K. Surasi, K.J. Cummings, C. Hanson, M.K. Morris, M. Salas, R. Thilakaratne, C. Stainken, D.A. Wadford); Golden Gate Fields, Berkeley, California, USA (D. Seftel); City of Berkeley Public Health Officer Unit, Berkeley (L. Ortiz); Kaiser Permanente San Francisco Internal Medicine Residency Program, San Francisco, California, USA (C. Stainken); University of California San Francisco School of Medicine, San Francisco (C. Stainken).

Main Article

Table 3

BinaxNOW rapid antigen test performance compared with real-time reverse transcription PCR for coronavirus disease in using 2 different cycle threshold values to define positive results, California, USA, November–December 2020*

BinaxNOW performance % (95% CI)
Ct <37† Ct <30‡
PPA 43.3 (34.6–52.4) 55.6 (45.2–65.6)
NPA 100.0 (99.4–100.0) 100.0 (99.5–100)
PPV 100.0 (93.5–100.0) 100.0 (93.5–100)
NPV 89.9 (87.5–92.0) 93.8 (91.8–95.5)

*Results for 769 paired specimens from 342 horse racetrack staff. Ct, cycle threshold; NPA, negative percent agreement; NPV, negative predictive value; PPA, positive percent agreement; PPV, positive predictive value; rRT-PCR, real-time reverse transcription PCR. †127 rRT-PCR–positive specimens. ‡100 rRT-PCR–positive specimens.

Main Article

Page created: August 18, 2021
Page updated: October 19, 2021
Page reviewed: October 19, 2021
The conclusions, findings, and opinions expressed by authors contributing to this journal do not necessarily reflect the official position of the U.S. Department of Health and Human Services, the Public Health Service, the Centers for Disease Control and Prevention, or the authors' affiliated institutions. Use of trade names is for identification only and does not imply endorsement by any of the groups named above.
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