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In-vitro bactericidal activity of cefpirome in combination with vancomycin against Staphylococcus aureus and
J Raymond1, G Vedel, M Bergeret
1Service Microbiologie, Hôpital Saint Vincent de Paul, Paris, France.
Abstract:
In an in-vitro study of the bactericidal activity of cefpirome in combination with vancomycin against 11 clinical isolates of staphylococci, cefpirome at a concentration of 0.25 times the MIC acted synergistically with vancomycin (at a concentration of 0.5, 1 or 2 times the MIC) against Staphylococcus aureus and coagulase-negative staphylococci susceptible or resistant to methicillin. Moreover, increasing the cefpirome concentration to 0.5 or 1 times the MIC combined with vancomycin at the same concentration (0.5 or 1 times the MIC) improved the bacterial killing rate; a bactericidal effect was obtained in 9 or 24 h instead of in 24 or 48 h, respectively.