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Inicio Enfermedades Infecciosas y Microbiología Clínica Actividad in vitro comparativa de garenoxacino (BMS-284756). Programa SENTRY Esp...
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Vol. 21. Issue 8.
Pages 404-409 (January 2003)
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Vol. 21. Issue 8.
Pages 404-409 (January 2003)
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Actividad in vitro comparativa de garenoxacino (BMS-284756). Programa SENTRY España (1999-2000)
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Elena Lozaa,e
Corresponding author
eloza.hrc@salud.madrid.org

Dra. E. Loza. Servicio de Microbiología. Hospital Ramón y Cajal. Ctra. de Colmenar, km 9. 28034 Madrid. España
, Rafael Cantóna, Álvaro Pascualb, Fe Tubauc, M.ª Isabel Morosinia, Felisa Almaraza, Evelio Pereab, Rogelio Martínc, Ronald N. Jonesd
a Servicio de Microbiología. Hospital Ramón y Cajal. Madrid
b Servicio de Microbiología. Hospital Virgen Macarena. Sevilla
c Servicio de Microbiología. Hospital Bellvitge. Barcelona. España
d The Jones Group. Iowa. Estados Unidos
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Fundamento

Evaluar la actividad in vitro de la nueva des-fluoro (6) quinolona garenoxacino (BMS-284756) comparativamente con ciprofloxacino, levofloxacino y gatifloxacino frente a microorganismos recogidos en 1999 y 2000 durante el programa SENTRY

Métodos

Se estudiaron 2.599 aislados procedentes del Hospital Ramón y Cajal (Madrid), Virgen Macarena (Sevilla) y Bellvitge (Barcelona). Las concentraciones inhibitorias mínimas (CIM) se realizaron por microdilución (National Committee for Clinical Laboratory Standards, NCCLS)

Resultados

Frente a Enterobacteriaceae el rango de Cim modal de garenoxacino fue ≤ 0,03-0,12 mg/l, similar al resto de quinolonas. El 70% de los aislados de Pseudomonas aeruginosa fueron sensibles a garenoxacino y el 85% a ciprofloxacino y levofloxacino. Garenoxacino fue la quinolona más activa en Staphylococcus aureus (sensibles y resistentes a meticilina), con valores de Cim90 de ≤ 0,03 y 2 mg/l, respectivamente. Todos los aislados de Streptococcus pneumoniae fueron sensibles a garenoxacino y su actividad no se modificó en los que presentaban sensibilidad disminuida a penicilina; en términos de Cim90, garenoxacino fue 16 veces más activa que ciprofloxacino y levofloxacino y de 4 a 8 veces más que gatifloxacino. Los seis aislados de S. pneumoniae resistentes a ciprofloxacino presentaron valores de CIM de garenoxacino entre ≤ 0,03 y 0,5 mg/l. Frente a Haemophilus influenzae y Moraxella catarrhalis garenoxacino tuvo una excelente actividad (Cim ≤ 0,06 mg/l), al igual que el resto de quinolonas

Conclusiones

La actividad de garenoxacino fue similar a la del resto de quinolonas frente a Enterobacteriaceae, inferior en P. aeruginosa y superior frente a microorganismos grampositivos, incluyendo S. aureus resistentes a meticilina y S. pneumoniae con sensibilidad disminuida a penicilina

Palabras clave:
Garenoxacino
Fluoroquinolonas
Actividad in vitro
Introduction

Comparative in vitro activity of garenoxacin (BMS-284756). Sentry program, Spain (1999-2000). To evaluate the in vitro activity of the new des-fluoro quinolone, garenoxacin (BMS-284756), compared to activities of ciprofloxacin, levofloxacin, and gatifloxacin in clinical isolates recovered over 1999 and 2000 within the SENTRY antimicrobial surveillance program

Methods

Quinolone-MICs were performed using the standard NCCLS microdilution technique in 2599 isolates recovered from Hospital Ramón y Cajal (Madrid), Virgen Macarena (Sevilla), and Bellvitge (Barcelona)

Results

The modal MIC range value exhibited by garenoxacin (≤ 0.03-0.12 mg/L) for Enterobacteriaceae was similar to that of the other quinolones tested. A total of 70% of Pseudomonas aeruginosa isolates were susceptible to garenoxacin and 85% to ciprofloxacin and levofloxacin. Garenoxacin exhibited the highest activity in Staphylococcus aureus, including both methicillin-susceptible and -resistant isolates, with MIC90 values of ≤ 0.03 and 2 mg/L, respectively. All Streptococcus pneumoniae isolates were susceptible to garenoxacin, regardless of their penicillin susceptibility status; in terms of MIC90, garenoxacin was 16 times more active than ciprofloxacin and levofloxacin and 4-8 times more active than gatifloxacin. All 6 ciprofloxacin-resistant S. pneumoniae strains showed garenoxacin MIC values ranging from ≤ 0.03 to 0.5 mg/L. In Haemophilus influenzae and Moraxella catarrhalis, garenoxacin displayed excellent in vitro activity (MIC ≤ 0.06 mg/L), similar to that of the other quinolones tested

Conclusions

Garenoxacin activity was similar to the activity of other quinolones in Enterobacteriaceae, but was lower in P. aeruginosa. Garenoxacin activity was clearly higher than that of other quinolones in gram-positive isolates, including methicillin-resistant S. aureus and S. pneumoniae with reduced penicillin susceptibility

Key words:
Garenoxacin
Fluoroquinolones
In vitro activity
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Copyright © 2003. Elsevier España, S.L.. Todos los derechos reservados
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