ISO. First edition. Clinical laboratory testing and in vitro diagnostic test systems — Susceptibility testing of infectious agents and evaluation. Buy ISO , Susceptibility testing of infectious agents and evaluation of performance of antimicrobial susceptibility test devices, Part 1, at CLSI. ISO () Clinical laboratory testing and in vitro diagnostic test systems – Susceptibility testing of infectious agents and evaluation of performance of.
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Precision of fluconazole dilution series by is procedure and laboratory a. Considering only data for dilution series prepared in Spain, no systematic difference was detected between ISO dilution and serial dilution. According to those standards and the ISO recommendations, the 2-fold dilutions of compounds should be performed in a multistep, rather complex, and time-consuming fashion, avoiding serial dilutions in order to prevent the risk of a systematic error being induced, for instance, by an imprecise pipette 9.
Empfindlichkeitspruefung von Infektionserregern und Evaluation von Geraeten zur antimikrobiellen Empfindlichkeitspruefung. Published online Mar Dilution procedures are used to determine the minimum inhibitory concentrations MICs of antimicrobial agents and are the reference method for antimicrobial susceptibility testing.
International Organization for Standards, Geneva, Switzerland. Learn more about the cookies we use and how to change your settings. ITC is a weakly basic drug pKa ca. ISO Clinical laboratory testing and in vitro diagnostic test systems – Susceptibility testing of infectious agents and evaluation of performance of antimicrobial susceptibility test devices – Part 1: Sensitive determination of itraconazole and its active metabolite in human plasma by column-switching high-performance liquid chromatography with ultraviolet detection.
Overview Product Details In vitro susceptibility tests are performed on microorganisms suspected of causing disease, particularly if the organism is thought to belong to a species that may exhibit resistance to frequently used antimicrobial agents. Search all products by. Precision of itraconazole dilution series by procedure and laboratory a. This article has been cited by other articles in PMC.
National Center for Biotechnology InformationU. Thus, ITC data obtained from trays prepared by the Inn Austria participant were excluded from the analysis since tray wrappings showed evidence of defrosting and spillage; also, concentrations of dilutions prepared in Denmark were unacceptably different from the target concentrations.
In summary, our data suggest that microdilution trays for hydrophilic drugs such as FLC can be accurately prepared following the ISO recommendations or the serial 2-fold izo schemes.
All statistical analyses were done with the statistical package PAWS statistics Previous versions of documents Veterinary Susceptibility Testing Susceptibility testing of infectious agents and evaluation of performance of antimicrobial susceptibility test devices Evaluation of performance of antimicrobial susceptibility test devices BS EN Reference method for testing the in vitro activity of antimicrobial agents against rapidly growing anaerobic bacteria involved in infectious diseases.
Author information Article notes Copyright and License information Disclaimer. The method was validated by performing three calibration curves on consecutive days. MIC methods are used in resistance surveillance, comparative testing of new agents, to establish the susceptibility of organisms that give equivocal results in routine tests, for tests on organisms where routine tests may be unreliable and when a quantitative result is required for clinical management.
Microtiter plates were prepared according to the ISO standard and by serial dilution procedures recommended for preparation of trays of both hydrophilic and hydrophobic drugs 92076-1 Although clinical interpretation of the MIC value is beyond the scope of this 207761 of ISOmodifications of the basic method are required for certain antimicrobial agent – bacteria combinations to facilitate clinical interpretation.
In vitro susceptibility tests are performed on microorganisms suspected of causing disease, particularly if the organism is thought to belong to a species that may exhibit resistance to frequently used antimicrobial agents. Systemes d’essais en laboratoire et de diagnostic in vitro.
Broth dilution is a technique in which containers holding identical volumes of broth with antimicrobial agent solutions in incrementally usually geometrically increasing concentrations are inoculated with a known number of microorganisms.
Thus, serial dilution, which is attractive due to its simplicity, may be appropriate.
Relevant external documents
Worldwide Standards We can source any standard from anywhere in the world. You are advised to check costs as they may differ substantially between suppliers. Furthermore, previous studies have demonstrated a much higher interlaboratory variation in MIC results for quality control strains for itraconazole than for flucytosine and fluconazole 6 iao 8. Regarding serial 2-fold dilution procedures, better results were detected when FLC plates were prepared according to the hydrophilic rather than kso hydrophobic way.
Click to learn more. FLC eluted at 4. Susceptibility testing of yeasts Sitemap Search close sitemap.
EUCAST: External documents
Open in a separate window. Clinical breakpoints for antimycobacterial agents Development and validation of an efficient HPLC method for quantification of voriconazole in plasma and microdialysate reflecting an important target site. While this is the gold standard for preparation of dilution series, the question has risen if modern pipettes are sufficiently precise to allow dilution series to be prepared as serial dilutions without a loss of accuracy.