Journal of Antimicrobial Chemotherapy, Vol 39, 355-361, Copyright © 1997 by The British Society for Antimicrobial Chemotherapy
LO White, HA Holt, DS Reeves and AP MacGowan
The Innofluor fluorescence polarization immunoassay (FPIA) kits for
gentamicin, tobramycin, amikacin and vancomycin were evaluated on an Abbott
TDX analyser. Intra-assay reproducibility was excellent with a coefficient
of variation of <3% for all analytes. The coefficient of variation for
inter-assay reproducibility was usually <5%. Assay linearity was good
and standard curve stability was seen with kits of the same batch for at
least 32 days. Using clinical samples, the results obtained with the
Innofluor FPIA reagents correlated well with those obtained using Abbott
FPIA reagents, but Innofluor gentamicin and amikacin results were slightly
higher than Abbott results (P < 0.001). Results of UK NEQAS returns
showed acceptable accuracy for the Innofluor kits, but mean Innofluor
gentamicin returns were 4% higher (P = 0.001) and mean vancomycin returns
were 5% lower (P = 0.001) than overall mean returns. Innofluor and Abbott
vancomycin assay reagents showed similar cross-reactivity to degraded
vancomycin.
JOURNAL ARTICLE
Evaluation of Innofluor fluorescence polarization immunoassay kits for the determination of serum concentrations of gentamicin, tobramycin, amikacin and vancomycin.lesassays@ukneqasaa.win-uk.net
Department of Medical Microbiology, Southmead Health Services NHS Trust, Bristol, UK.
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