1. Evaluation of the utility and cost of secondary confirmatory testing for Neisseria gonorrhoeae identification from culture.
- Author
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Avery EG, Zeppa JJ, Duncan DB, Barker KR, Fattouh R, Matukas LM, Rutherford C, Cabrera A, Sheth PM, Tran V, Goneau L, Katz K, Li XX, and Kozak R
- Subjects
- Humans, Bacteriological Techniques economics, Bacteriological Techniques methods, Neisseria gonorrhoeae isolation & purification, Neisseria gonorrhoeae classification, Spectrometry, Mass, Matrix-Assisted Laser Desorption-Ionization methods, Spectrometry, Mass, Matrix-Assisted Laser Desorption-Ionization economics, Gonorrhea diagnosis, Gonorrhea microbiology, Sensitivity and Specificity
- Abstract
Current guideline recommends the use of two identification methods for Neisseria gonorrhoeae. Matrix-assisted laser desorption/ionization time-of-flight mass spectrometry (MALDI-TOF) is now used for primary identification and may be sufficient for definitive identification of N. gonorrhoeae. The performance of three secondary tests (BactiCard, RapID NH and NET test) were compared using 45 bacterial isolates, including 37 Neisseria species. These secondary tests demonstrated diminished specificity (67% - 88%) for N. gonorrhoeae compared with MALDI-TOF. Additionally, data from six clinical microbiology laboratories was used to compare confirmatory test costs and the agreement of results with MALDI-TOF. Discrepancies were documented for 9.4% of isolates, though all isolates (n= 288) identified by MALDI-TOF as N. gonorrhoeae were confirmed by the reference laboratory. These data demonstrate that MALDI-TOF alone is sufficient for N. gonorrhoeae identification, as secondary did not add diagnostic value but do add costs to the testing process., Competing Interests: Declaration of competing interest The authors declare that they have no known competing financial interests or personal relationships that could have appeared to influence the work reported in this paper., (Copyright © 2024 The Authors. Published by Elsevier Inc. All rights reserved.)
- Published
- 2024
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