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Whether or not bacterial populations are massively enclosed in slime, it appears that antibiotic resistance, when compared to suspension organisms, is related to surface adhesion and to the specific material of the substratum. These findings are of significance in the understanding and treatment of biomaterial-localized infections.
This work has been performed to study the inoculum effect on the in vitro activity of LY 146032, a new lipopeptide antibiotic. A statistical analysis (X2 and t test) of the data concerning the MIC of different bacterial groups has been carried out to appreciate the phenomenon. The activity of vancomycin has been compared. A major inoculum effect has been detected for LY 146032. It must be taken into account to evaluate the activity of this new antibiotic.