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handle: 10261/188252
[EN] Introduction: Mass spectrometry Matrix-Assisted Laser Desorption-Ionization Time-of-Flight (MALDI-TOF) helps in the rapid identification of microorganisms causing blood stream infection. Rapid and reliable methods are required to decrease the turnaround time for reporting antimicrobial susceptibility results from blood culture isolates. Methods: An evaluation was performed on the reliability of a method for antimicrobial susceptibility testing of positive blood culture isolates from briefly incubated solid medium cultures. Results: The agreement between the evaluated and standard methods was 99.3%. The major and minor error rates were 0.4% and 0.3%, respectively, and no very major errors were observed. Conclusion: The inoculation of briefly incubated solid medium cultures into antimicrobial susceptibility testing panels is an easy and reliable technique, and helps to decrease the turnaround time for reporting antimicrobial susceptibility results of positive blood cultures.
[ES] Introducción: La espectrometría de masas Matrix-Assisted Laser Desorption-Ionization Time-of-Flight (MALDI-TOF) permite la identificación rápida de los microorganismos causantes de bacteriemia. Se requieren métodos fiables y rápidos que permitan acortar el tiempo necesario hasta disponer de los resultados de sensibilidad a antibióticos de los aislados de hemocultivos. Métodos: Se evalúa la fiabilidad de un método que combina la identificación con MALDI-TOF y el estudio de sensibilidad en paneles de microdilución inoculados a partir de un subcultivo incubado durante solo 4 h. Resultados: La concordancia de los resultados de sensibilidad a antibióticos de la técnica evaluada frente a la técnica de referencia fue del 99,3%, sin que se observaran errores máximos. Conclusión: La inoculación de paneles de microdilución a partir de un subcultivo de solo 4 h de incubación es un método fiable y fácil de realizar que permite acortar el tiempo de informe de hemocultivos positivos.
Peer reviewed
Hemocultivo, Bloodculture, Matrix-Assisted Laser Desorption-Ionization Time-of-Flight, Bacteriemia, Bacteremia, Sensibilidad a antibióticos, Antimicrobial susceptibility
Hemocultivo, Bloodculture, Matrix-Assisted Laser Desorption-Ionization Time-of-Flight, Bacteriemia, Bacteremia, Sensibilidad a antibióticos, Antimicrobial susceptibility
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