Summary
We have studied thein-vitro activity of erythromycin, vancomycin and pristinamycin against 1,006 clinical isolates comprising streptococci, staphylococci,Neisseria gonorrhoeae, Haemophilus influenzae and anaerobes.In-vitro studies show pristinamycin to inhibit staphylococci and streptococci, including erythromycin highly-resistant organisms, at a concentration of ≤ 0.78 mg/l. Although pristinamycin's mean MIC for streptococci is higher than that of erythromycin, pristinamycin is bactericidal, whereas erythromycin is bacteristatic againstStreptococcus agalactiae and oral streptococci. Enterococci were less uniformly susceptible to pristinamycin: 58 of the 94Enterococcus faecalis tested were resistant (MIC ≥ 3.12 mg/l). 14 of the 15 isolates ofEnterococcus faecium were inhibited by ≤ 1.56 mg/l pristinamycin. Pristinamycin showed poor activity againstHaemophilus influenzae (mode MIC 1.56 and MIC90 of 3.12 mg/l) but all except two of the 100Neisseria gonorrhoeae tested were inhibited by ≤ 0.78 mg/l pristinamycin. Pristinamycin inhibited all nineClostridium spp. at ≤ 0.39 mg/l and 38 of 40 strains of anaerobic gram-positive cocci at ≤ 0.78 mg/l. It was less effective against theBacteroides fragilis group: (MIC90 3.12 mg/l). Pristinamycin had poor bactericidal activity against the anaerobes tested.
Zusammenfassung
Wir haben das In vitro-Verhalten von Erythromycin, Vancomycin und Pristinamycin gegenüber 1006 klinischen Isolaten, zusammengesetzt aus Streptokokken, Staphylokokken,Neisseria gonorrhoeae, Haemophilus influenzae und Anaerobiern untersucht. Die In vitro-Untersuchungen zeigen, daß Pristinamycin Staphlokokken und Streptokokken bei einer Konzentration von ≤ 0,78 mg/l hemmt, einschließlich der gegen Erythromycin hoch resistenten Stämme. Obwohl die mittlere MHK von Pristinamycin für Streptokokken höher ist als die des Erythromycin, ist Pristinamycin bakterizid. Dagegen wirkt Erythromycin aufStreptococcus agalactiae und orale Streptokokken bakteriostatisch. Enterokokken reagierten weniger gleichbleibend auf Pristinamycin. 58 der 94 getestetenEnterococcus faecalis-Isolate waren resistent (MHK ≥ 3,12 mg/l). 14 von 15Enterococcus faecium-Isolaten wurden durch ≤ 1,56 mg/l Pristinamycin gehemmt. Pristinamycin zeigte eine geringe Aktivität gegenüberHaemophilus influenzae (Mittlere MHK 1,56 mg/l und MHK90 3,12 mg/l). Alle bis auf zwei der getesteten 100Neisseria gonorrhoeae-Isolate wurden durch ≤ 0,78 mg/l Pristinamycin gehemmt. Pristinamycin hemmte alle neunClostridium spp. bei ≤ 0,39 mg/l und 38 von 40 Stämmen anaerober grampositiver Kokken bei ≤ 0,78 mg/l. Pristinamycin war weniger erfolgreich gegen dieBacteroides fragilis-Gruppe: (MHK90 3,12 mg/l). Pristinamycin zeigte nur wenig Aktivität gegenüber den Anaerobiern.
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Maskell, J.P., Sefton, A.M., Williams, J.D. et al. Comparative in-vitro activity of erythromycin, vancomycin and pristinamycin. Infection 16, 365–370 (1988). https://doi.org/10.1007/BF01644551
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DOI: https://doi.org/10.1007/BF01644551