Evaluation and validation of Biolog Omnilog® system for antibacterial activity assays

Forskningsoutput: TidskriftsbidragArtikelVetenskapligPeer review

Sammanfattning

Minimal inhibitory concentration of antimicrobials, determined by the broth microdilution method, requires visual assessment or absorbance measurement using a spectrophotometer. Both procedures are usually performed manually, requiring the presence of an operator to assess the plates at specific time point. To increase the throughput of antimicrobial susceptibility testing, and concurrently convert into an automatic assay, the Biolog OmniLog(R) system was validated for a new, label-free application using standard 96-well microplates. OmniLog was evaluated for its signal strength to ensure that the signal intensity, detected and measured by the system's camera, was satisfactory. Variability due to the plate location inside the OmniLog incubator, as well as variation between wells, was investigated. Then the system was validated by determining the minimal inhibitory concentration of ciprofloxacin, piperacillin and linezolid against a selected Gram-negative and Gram-positive strains. No significant difference was observed in relation to position of the plates within the system. Plate edge effects were noticeable, thus the edge wells were not included in further experiments. Minimal inhibitory concentration results were comparable to those obtained by conventional protocol as well as to values defined by the Clinical Laboratory Standards Institute or published in the literature.

Originalspråkengelska
TidskriftLetters in Applied Microbiology
Volym72
Utgåva5
Sidor (från-till)589-595
Antal sidor7
ISSN0266-8254
DOI
StatusPublicerad - maj 2021
MoE-publikationstypA1 Tidskriftsartikel-refererad

Vetenskapsgrenar

  • 318 Medicinsk bioteknologi

Citera det här