Resistance of two strains of Streptococcus pneumoniae to pristinamycin associated with 16-membered macrolides.

Two strains of Streptococcus pneumoniae isolated from haemocultures show a phenotype resistance which has never been described within this species. This a is a dissociation between resistance and sensitivity within the macrolides group, associated with global resistance as regards pristinamycin (SA + SB).