Time-kill effect of levofloxacin on multidrug-resistant Pseudomonas aeruginosa and Acinetobacter baumannii: synergism with imipenem and colistin.
Eur J Clin Microbiol Infect Dis
; 34(2): 317-23, 2015 Feb.
Article
en En
| MEDLINE
| ID: mdl-25192733
ABSTRACT
In the present study, we challenged the concept that levofloxacin should not be used for the management of ventilator-associated pneumonia (VAP) when minimum inhibitory concentrations (MICs) exceed 2 µg/ml. Multidrug-resistant (MDR) and genetically distinct isolates of Pseudomonas aeruginosa (n = 49) and Acinetobacter baumannii (n = 29) from patients with VAP were exposed over time to levofloxacin, imipenem, colistin and their combinations. Synergy between levofloxacin and imipenem was found in 55.3 % and between levofloxacin and colistin in 90.9 % of isolates of P. aeruginosa within the first 4 h of growth. Synergy with imipenem but not with colistin was dependent of the MIC. Synergy between levofloxacin and imipenem was found in 58.6 % of isolates of A. baumannii after 24 h of growth. Considerable synergy was found between levofloxacin and colistin, reaching 84.8 % of isolates of A.baumannii after 6 h of growth. Synergy was independent from the MIC. These results create hopes that levofloxacin can be used as combination therapy for infections by MDR bacteria.
Texto completo:
1
Base de datos:
MEDLINE
Asunto principal:
Pseudomonas aeruginosa
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Infecciones por Pseudomonas
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Infecciones por Acinetobacter
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Acinetobacter baumannii
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Neumonía Asociada al Ventilador
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Levofloxacino
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Antibacterianos
Límite:
Humans
Idioma:
En
Revista:
Eur J Clin Microbiol Infect Dis
Asunto de la revista:
DOENCAS TRANSMISSIVEIS
/
MICROBIOLOGIA
Año:
2015
Tipo del documento:
Article
País de afiliación:
Grecia