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A two-hour procedure for determining the susceptibility of enterococci and staphylococci to antibiotics by a colourimetric method.

Authors: March Rosselló, Gabriel Alberto; Gutiérrez-Rodríguez, María Purificación; Simarro-Grande, María; Orduña, Antonio; Bratos Pérez, Miguel Ángel;

A two-hour procedure for determining the susceptibility of enterococci and staphylococci to antibiotics by a colourimetric method.

Abstract

[ES]: [Introducción]: La realización de un antibiograma rápido sigue siendo un reto para los laboratorios de Microbiología Clínica. [Métodos]: Se ha realizado una mejora en el antibiograma colorimétrico realizado mediante resazurina en estafilococos y enterococos. El diseño del método se realizó mediante el uso de dos cepas de colección que presentan una sensibilidad conocida. Este procedimiento se validó posteriormente frente a los métodos comerciales mediante el procesamiento de 15 cepas de estafilococos y 15 de enterococos aisladas de pacientes. [Resultados]: Se ha obtenido un 100% de concordancia entre la sensibilidad obtenida mediante resazurina y la obtenida mediante los métodos comerciales (E-test, MicroScan and VITEK2). [Conclusión]: Mediante el uso de resazurina es posible obtener un antibiograma en estafilococos y enterococos en menos de dos horas de forma fiable.

[EN]: [Introduction]: Rapid determination of the antibiotic susceptibility test in bacteria remains a challenge for Clinical Microbiology laboratories. [Methods]: An improvement in the colorimetric antimicrobial susceptibility testing performed with resazurin in enterococci and staphylococci has been carried out. The design of method was performed using two collection strains, which have a known susceptibility. This procedure was then validated against standard commercial methods on 15 strains of staphylococci and 15 strains of enterococci from patients. [Results]: The essential agreement between the colorimetric method and commercial methods (E-test, MicroScan and VITEK2) was 100%. [Conclusion]: Resazurin allows us to obtain a reliable antibiotic susceptibility test in staphylococci and enterococci in less than two hours.

This work was supported by a grant from the Fundación Francisco Soria Melguizo, Spain.

Peer Reviewed

Keywords

Antibiograma rápido, Resazurin, Rapid antibiotic susceptibility test, Staphylococcus, Colony Count, Microbial, Reproducibility of Results, Bacteriology, Microbial Sensitivity Tests, Staphylococcal Infections, Anti-Bacterial Agents, Xanthenes, Resazurina, Oxazines, Humans, Colorimetry, Indicators and Reagents, Bacteriología, Enterococcus, Gram-Positive Bacterial Infections

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selected citations
These citations are derived from selected sources.
This is an alternative to the "Influence" indicator, which also reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
BIP!Citations provided by BIP!
popularity
This indicator reflects the "current" impact/attention (the "hype") of an article in the research community at large, based on the underlying citation network.
BIP!Popularity provided by BIP!
influence
This indicator reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
BIP!Influence provided by BIP!
impulse
This indicator reflects the initial momentum of an article directly after its publication, based on the underlying citation network.
BIP!Impulse provided by BIP!
4
Average
Average
Average
Green
gold