Improved performances of the second generation of the ID NOW influenza A&B 2® and comparison with the GeneXpert® - Archive ouverte HAL
Article Dans Une Revue European Journal of Clinical Microbiology and Infectious Diseases Année : 2020

Improved performances of the second generation of the ID NOW influenza A&B 2® and comparison with the GeneXpert®

Eric Farfour
Marie Ballester
  • Fonction : Auteur
Léa Gagneur
  • Fonction : Auteur
Claudine Renaux
  • Fonction : Auteur
Emilie Jolly
  • Fonction : Auteur
Marc Vasse
  • Fonction : Auteur

Résumé

Due to the congestion of emergency wards, a rapid and accurate method for flu diagnosis is required. However, the first evaluations of the ID NOW® influenza A&B performances were heterogeneous. We aimed to (i) assess the performance of the second generation of the ID NOW® influenza A&B 2 and (ii) compare the ID NOW® to the GeneXpert® use when performed within a central laboratory. (i) Analytical performances of ID NOW® were assessed using a collection of 112 clinical samples in comparison with a reference multiplex PCR (Seegene®); (ii) Invalid rate per operator and time to result were calculated for the GeneXpert® Xpress Flu/RSV and the ID NOW® influenza A&B 2® during 2017-2018 and 2018-2019 flu outbreaks respectively. ID NOW® reaches an overall sensitivity and specificity of 96.6% and 96.1% respectively. Most of the false-negative display a CT > 37. For both instruments, a single operator was involved in about a half of all invalid results. Excluding this operator involved in most invalid result, the invalid rate was about 1% for both instruments. Time to result from sampling was significantly shorter in the ID NOW® versus the GeneXpert® group (33 vs 97 min, P < 0.01). The second generation of the ID NOW® influenza A&B 2 displays high performances, comparable with conventional PCR method. In order to prevent invalid results, we highlight the need for adequate training of operators. Also, when implemented in a central laboratory, the location of the instrument could have a strong impact on the time-to-results.
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Dates et versions

hal-04482432 , version 1 (28-02-2024)

Identifiants

Citer

Eric Farfour, Antoine Roux, Marie Ballester, Léa Gagneur, Claudine Renaux, et al.. Improved performances of the second generation of the ID NOW influenza A&B 2® and comparison with the GeneXpert®. European Journal of Clinical Microbiology and Infectious Diseases, 2020, 39 (9), pp.1681-1686. ⟨10.1007/s10096-020-03905-9⟩. ⟨hal-04482432⟩
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