Laboratory validation of a KPC-producing strain identification method based on the detection of a specific 11,109 Da peak via Maldi-Tof-Vitek MS in an endemic area.
New Microbiol
; 42(2): 114-117, 2019 Apr.
Article
en En
| MEDLINE
| ID: mdl-31034082
ABSTRACT
Matrix Assisted Laser Desorption/Ionization-Time of Flight (MALDI-TOF) Vitek MS system is a useful technique to identify bacteria strains isolated in clinical samples. In this paper, we applied this method to KPC-producing Enterobacteriaceae detection through the determination of a specific 11,109 (±8) Da peak. We assayed the presence, specificity and reliability of this peak on routine workflow through the analysis of 183 Enterobacteriaceae strains isolated from clinical samples and characterized by classical approaches. The peak was detected in 95.5% (129/135) of carbapenemase-producing strains spectra compared with the 48 extended spectrum beta-lactamase producing controls strains, which all lacked this peak. Hence, this 11,109 Da peak determination showed a Positive Predictive Value (PPV) of 100% and a Negative Predictive Value (NPV) of 94.4%. The characterization of this specific peak in a MALDI-TOF Vitek MS system might be considered a valuable tool to reveal KPC-producing Enterobacteriaceae especially in KPC endemic region.
Palabras clave
Buscar en Google
Colección:
01-internacional
Banco de datos:
MEDLINE
Asunto principal:
Técnicas de Tipificación Bacteriana
/
Espectrometría de Masa por Láser de Matriz Asistida de Ionización Desorción
/
Enterobacteriaceae
Tipo de estudio:
Diagnostic_studies
/
Prognostic_studies
Límite:
Humans
Idioma:
En
Revista:
New Microbiol
Asunto de la revista:
MICROBIOLOGIA
Año:
2019
Tipo del documento:
Article
País de afiliación:
Italia