Abstract

The in-vitro activity of erythromycin, oleandomycin, spiramycin, josamycin and pristinamycin was tested by a plate-dilution method against strains of Haemophilus influenzae and Neisseria meningitidis . Pristinamycin was the most active product tested with minimal inhibitory concentrations (MIC) ranging between 0·5 and 4 mg/l for H. influenzae (modal value 1 mg/l) and between 0·03 and 0·12 mg/l for N. meningitidis (modal value 0·06 mg/l).

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