Abstract：
:Pertussis is a highly contagious disease for which prompt, point-of-care diagnosis remains an unmet clinical need. Results from conventional test modalities (nucleic acid detection, serology, and culture) take hours to days. To overcome this challenge, we identified a new biomarker (tracheal colonization factor A, TcfA) for detection of Bordetella pertussis infection by lateral flow immunoassay (LFIA). We developed a library of 28 epitope-mapped monoclonal antibodies against TcfA and incorporated three antibodies into a LFIA. The LFIA did not cross-react with common bacterial or fungal organisms, but did react with nine distinct B. pertussis strains. The minimal linear epitope sequences targeted by the LFIA were conserved in 98% of 954 B. pertussis isolates collected across 12 countries from 1949-2017. The LFIA's limit of detection was 3.0 × 105 CFU/mL with B. pertussis cells in buffer, 6.2 × 105 CFU/mL with nasopharyngeal washes from a non-human primate model, and 2.3 ng/mL with recombinant TcfA. The LFIA reacted with patient nasopharyngeal swab specimens containing as few as 1.8 × 106 B. pertussis genomes/mL and showed no false-positives. Rapid (< 20 min) LFIA detection of TcfA as a biomarker for B. pertussis infection is feasible and may facilitate early detection of pertussis.
journal_name
Sci Repjournal_title
Scientific reportsauthors
Burnham-Marusich AR,Olsen RK,Scarbrough J,Kvam A,Yang W,Zimmerman L,Dunn JJ,Merkel T,Kozel TRdoi
10.1038/s41598-020-72092-6subject
Has Abstractpub_date
2020-09-14 00:00:00pages
15002issue
1issn
2045-2322pii
10.1038/s41598-020-72092-6journal_volume
10pub_type
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