Multicenter clinical evaluation of the automated Aries Bordetella assay

Ryan F. Relich, Amy Leber, Stephen Young, Ted Schutzbank, Ronald Dunn, Janet Farhang, Timothy S. Uphoff

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1 Scopus citations


Molecular methods offer superior sensitivity and specificity and reduce testing turnaround time from days to hours for detection of Bordetella pertussis and Bordetella parapertussis. In this study, we evaluated the performance of the automated PCR-based Aries Bordetella Assay, which detects both B. pertussis and B. parapertussis directly from nasopharyngeal swab specimens. The limits of detection (LoDs) were 1,800 CFU·ml- 1 for B. pertussis and 213 CFU·ml- 1 for B. parapertussis. The assay detected 16/18 unique B. pertussis/B. parapertussis strains. Of 71 potentially cross-reacting organisms, 5 generated false positives in 1/6 replicates; none of 6 additional Bordetella spp. were erroneously detected. Specimens were stable at 20 to 25°C for at least 10 h, at 4 to 8°C for 10 days, and at temperatures not exceeding -70°C for 6 months. Of 1,052 nasopharyngeal specimens from patients with suspected pertussis, 3.0% (n = 32) were B. pertussis positive and 0.2% (n = 2) were B. parapertussis positive. Combining these data with Aries Bordetella Assay data from 57 nasopharyngeal samples with previously confirmed B. pertussis or B. parapertussis data and with data from 50 contrived B. parapertussis samples, the proportions of positive and negative agreement of the respective Aries assays with the reference assays were 97.1% and 99.0% for B. pertussis and 100% and 99.7% for B. parapertussis. The Aries Bordetella Assay provides accurate detection and distinction of B. pertussis and B. parapertussis infections within 2 h. (This study has been registered at under registration no. NCT02862262).

Original languageEnglish (US)
Article numbere01471
JournalJournal of clinical microbiology
Issue number2
StatePublished - Feb 2019


  • Bordetella parapertussis
  • Bordetella pertussis
  • PCR
  • Pertussis
  • Whooping cough

ASJC Scopus subject areas

  • Microbiology (medical)

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    Relich, R. F., Leber, A., Young, S., Schutzbank, T., Dunn, R., Farhang, J., & Uphoff, T. S. (2019). Multicenter clinical evaluation of the automated Aries Bordetella assay. Journal of clinical microbiology, 57(2), [e01471].