Zusammenfassung
Fünf rezente Gonokokkenisolate wurden 25mal in Flüssigmedien überimpft, welche subinhibitorische Konzentrationen verschiedener Antibiotika enthielten. In Gegenwart von Rifampicin wurden alle Stämme schnell resistent (Einschrittyp). In Gegenwart von Penicillin, Enoxacin sowie Ciprofloxacin konnte ebenfalls eine Resistenzsteigerung beobachtet werden. Diese ist jedoch offensichtlich dem langsameren Mehrschrittyp zuzuordnen. Bemerkenswert ist ferner, daß bei Ciprofloxacin, sicherlich mit bedingt durch die von vornherein niedrigere MHK, bei keinem der fünf untersuchten Keime in Gegenwart einer höheren Konzentration als 0,064 mg/l noch Wachstum nach 25 Kulturpassagen auftrat. Eine schnelle Resistenzentwicklung vonNeisseria gonorrhoeae gegenüber Enoxacin oder Ciprofloxacin, welche in der Gonorrhoetherapie eingesetzt werden, muß somit nicht erwartet werden.
Summary
Five recent gonoccal isolates were exposed to subinhibitory concentrations of several antibioticsin vitro 25 times. In the presence of rifampicin all strains quickly became resistant. In the presence of penicillin, enoxacin and ciprofloxacin, antimicrobial susceptibility also decreased. Here development of resistance, however, corresponded to the multi- and not to the one-step type. It seems remarkable that even at the end of the experiments no strain grew at concentrations of ciprofloxacin exceeding 0.064 mg/l. In conclusion, quick development of resistance need not be expected after the introduction of newer quinolones into the therapy of gonorrhoea on a large scale.
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Korting, H.C., Lukacs, A. Resistenzsteigerung vom Mehrschrittyp bei in vitro wiederholt subinhibitorischen Konzentrationen von Zweitgenerationschinolonen ausgesetzten Neisseria gonorrhoeae-Isolaten. Infection 17 (Suppl 1), S6–S10 (1989). https://doi.org/10.1007/BF01643626
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DOI: https://doi.org/10.1007/BF01643626