In vitro development of resistance to six quinolones in Streptococcus pneumoniae, Streptococcus pyogenes, and Staphylococcus aureus.
نویسندگان
چکیده
Streptococcus pneumoniae, Streptococcus pyogenes, and Staphylococcus aureus isolates were exposed to subinhibitory MICs of ciprofloxacin, sparfloxacin, gatifloxacin, moxifloxacin, clinafloxacin, and gemifloxacin during a 10-day period. Subculturing led to resistance development, regardless of the initial potencies of the quinolones. None of the quinolones was associated with a significantly slower rate of resistance development.
منابع مشابه
In vitro activities of novel des-fluoro(6) quinolone BMS-284756 against mutants of Streptococcus pneumoniae, Streptococcus pyogenes, and Staphylococcus aureus selected with different quinolones.
BMS-284756 (T-3811) is a novel quinolone that lacks a fluorine at the C-6 position. BMS-284756 has a broad spectrum of antibacterial activity (3, 7). The purpose of the present study was (i) to analyze the in vitro activity of the novel quinolone against mutants of Streptococcus pneumoniae, Streptococcus pyogenes, and Staphylococcus aureus selected with marketed quinolones and (ii) to investiga...
متن کاملIn vitro activity of BAY 12-8039, a new 8-methoxyquinolone.
BAY 12-8039 is a new 8-methoxyquinolone with antibacterial activity against gram-positive bacteria which is significantly better than those of sparfloxacin or ciprofloxacin. The minimal inhibitory concentrations (MICs) for 90% of methicillin-susceptible Staphylococcus aureus and Staphylococcus epidermidis were 0.062 and 2 mg/l, respectively. The MIC90s for ciprofloxacin-resistant, methicillin-s...
متن کاملIn vitro and in vivo antibacterial activities of KRM-1648 and KRM-1657, new rifamycin derivatives.
The in vitro and in vivo antibacterial activities of the new rifamycin derivatives KRM-1648 and KRM-1657 were compared with those of rifampin. Rifabutin, ciprofloxacin, and clarithromycin were also tested for reference. The respective MICs of KRM-1648 and KRM-1657 for 90% of the strains tested (MIC90S) were 0.016 and 0.0078 microgram/ml, respectively, for methicillin-susceptible Staphylococcus ...
متن کاملبررسی اثر ضد میکروبی عصاره گیاه کلپوره بر میکروارگانیسم های عامل عفونت در شرایط آزمایشگاهی
Introduction & Objective: Teucrium polium belonging to Lamiaceae family has been widely used in traditional medicine for treatment of diseases. Regarding the existence of the active biological compounds in this plant, it seems that this plant has considerable antimicrobial ef-fects. The aim of this study is to investigate the antimicrobial effect of different concentra-tions of the aqueous an...
متن کاملComparative in vitro activity of ABT-773, a novel antibacterial ketolide.
The in vitro activities of ABT-773, erythromycin, clarithromycin, and azithromycin were compared. ABT-773 was the most active compound against macrolide-susceptible Streptococcus pneumoniae, Streptococcus pyogenes, Staphylococcus aureus, Staphylococcus epidermidis, Listeria monocytogenes, and Enterococcus spp. and multidrug-resistant Streptococcus pneumoniae. It also had good activity against g...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
برای دانلود متن کامل این مقاله و بیش از 32 میلیون مقاله دیگر ابتدا ثبت نام کنید
ثبت ناماگر عضو سایت هستید لطفا وارد حساب کاربری خود شوید
ورودعنوان ژورنال:
- Antimicrobial agents and chemotherapy
دوره 45 3 شماره
صفحات -
تاریخ انتشار 2001