title: [Current importance of resistance of group A streptococci to tetracyclines].
abstract: The resistance of group A streptococci to tetracyclines is a long-standing phenomenon, observed in numerous countries. Sixty strains of group A streptococcus, isolated in 1975 and 6976 at the Claude Bernard Hospital, were tested against natural and semi-synthetic tetracyclines and penicillin G. Whilst sensitivity to the latter was constant, approximately 30% of strains were resistant to tetracyclines. Amongst them, minocycline was nevertheless a little more active than natural tetracycline and doxycycline. The mechanism of this resistance would seem to be extra-chomosomal.
mesh_terms: D010400:Penicillin G / Q000494:pharmacology; D010403:Penicillin Resistance; D013297:Streptococcus pyogenes / Q000187:drug effects*; D013754:Tetracyclines / Q000494:pharmacology*
chemical_list: D013754:Tetracyclines; D010400:Penicillin G
vernacular_title: Importance actuelle de la résistance des streptocoques du groupe A aux tétracyclines.