Evaluation of the utility and cost of secondary confirmatory testing for Neisseria gonorrhoeae identification from culture.
Diagn Microbiol Infect Dis
; 109(3): 116336, 2024 Jul.
Article
in En
| MEDLINE
| ID: mdl-38723452
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.
Key words
Full text:
1
Collection:
01-internacional
Database:
MEDLINE
Main subject:
Gonorrhea
/
Sensitivity and Specificity
/
Spectrometry, Mass, Matrix-Assisted Laser Desorption-Ionization
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Neisseria gonorrhoeae
Limits:
Humans
Language:
En
Journal:
Diagn Microbiol Infect Dis
Year:
2024
Type:
Article
Affiliation country:
Canada