Revista Panamericana de Salud Pública
On-line version ISSN 1680-5348Print version ISSN 1020-4989
HERNANDEZ, María Espino; RAMOS, María Julia Couto and FERRER, Niurka Fiol. Azlocillin plus amikacin: an alternative therapy for sepsis caused by resistant staphylococci?. Rev Panam Salud Publica [online]. 2004, vol.16, n.5, pp.315-319. ISSN 1680-5348. http://dx.doi.org/10.1590/S1020-49892004001100004.
OBJECTIVE: To assess the effectiveness of combined therapy with azlocillin and amikacin in a group of neonates with sepsis caused by multiresistant staphylococci who were hospitalized in the neonatal intensive care unit of Hospital Ginecobstétrico "América Arias" in Havana, Cuba, from 1998 to 2000. METHODS: A retrospective study was carried out of the clinical and laboratory results obtained in 15 patients with sepsis caused by multiresistant staphylococci who received combined therapy with azlocillin and amikacin, according to hospital guidelines on the use of antibiotics. We used a broth microdilution method to study the patterns of resistance shown by isolated strains to 10 of the antibiotics in use. In vitro synergy tests, specifically the checkerboard technique with microtitration plates, were used to observe the effects of treatment in 8 patients. RESULTS: Twelve coagulase-negative staphylococci and three Staphylococcus aureus isolates showed five different patterns of resistance on the basis of their sensitivity to oxacillin, three aminoglycosides, and vancomycin. Six of the synergy tests showed a considerable synergistic effect, with an average three-fold reduction in the minimum inhibitory concentrations (MIC) of the two antibiotics used to treat the patients. No antagonistic effects were noted, and the combined antibiotics showed an overall clinical effectiveness of 91.7%. CONCLUSIONS: The test showed that the therapeutic combination used was effective, but further studies are needed before conclusive results are obtained.
Keywords : Staphylococcus; septicemia; neonato; resistencia a múltiples drogas; sinergismo de drogas; combinación de medicamentos; antibióticos combinados; azlocilina; amicacina (amikacina).