Asunto(s)
Gonorrea , Neisseria gonorrhoeae , Genotipo , Gonorrea/diagnóstico , Humanos , Italia , Neisseria gonorrhoeae/genéticaRESUMEN
An ease-of-use protocol for the identification of resistance against third-generation cephalosporins in Enterobacteriaceae isolated from blood culture bottles was evaluated using matrix-assisted laser desorption ionization-time-of-flight mass spectrometry. A cefotaxime hydrolysis assay from chocolate agar subcultures using antibiotic discs and without inoculum standardization was developed for routine work flow, with minimal hands-on time. This assay showed good performance in distinguishing between cefotaxime-susceptible and cefotaxime-resistant strains, with excellent results for Escherichia coli (sensitivity 94.7%, specificity 100%). However, cefotaxime resistance was not detected reliably in Enterobacteriaceae expressing AmpC genes or carbapenemase-producing Klebsiella pneumoniae.
Asunto(s)
Cultivo de Sangre , Resistencia a las Cefalosporinas , Enterobacteriaceae/efectos de los fármacos , Pruebas de Sensibilidad Microbiana/métodos , Espectrometría de Masa por Láser de Matriz Asistida de Ionización Desorción/métodos , Antibacterianos/metabolismo , Cefotaxima/metabolismo , Enterobacteriaceae/aislamiento & purificación , Hidrólisis , Sensibilidad y Especificidad , Factores de TiempoRESUMEN
In this study we evaluated MALDI-TOF MS and FilmArray methods for the rapid identification of yeast from positive blood cultures. FilmArray correctly identified 20/22 of yeast species, while MALDI-TOF MS identified 9/22. FilmArray is a reliable and rapid identification system for the direct identification of yeasts from positive blood cultures.
