PL
Określono wrażliwość na antybiotyki makrolidowe szczepów B. pertussis i B. parapertussis izolowanych od chorych dzieci w latach 1968 i 1997-99. Nie stwierdzono znaczących różnic we wrażliwości na te antybiotyki badanych szczepów. Najbardziej aktywnym antybiotykiem wobec wszystkich szczepów okazała się azytromycyna, a najmniejszą aktywność wykazała spiramycyna i oleandomycyna.
EN
The activity of erythromycin, azithromycin, clarithromycin, dirithromycin, oleandomycin, roxithromycin, spiramycin and josamycin against 21 and 34 B. pertussis strains and against 6 and 8 B. parapertussis strains isolated respectively in the years 1968 and 1997—99 was examined. The antibiotic agar dilution method was used. The minimum concentration of macrolides which inhibited growth of B. pertussis and B. parapertussis was calculated for 50% (MIC50) and 90% (MIC90) of isolates. The susceptibility to macrolides of B. pertussis and B. parapertussis strains isolated in the years 1968 and 1997-99 did not differ significantly. The MIG90 values of erythromycin were the same for B. pertussis (MIC90 = 0,125 mg/l) and B.parapertussis strains (MIC 90 = 0,25 mg/l) recovered in 1968 as for those recovered in the years 1997-99. The most active antibiotic against all strains was azithromycin (MIC90 = 0,06 mg/l). The least active antibiotics were oleandomycin (MIC90 = 2-4 mg/l) and spiramycin (MIC90 = 8 mg/I). The study showed that erythromycin remains the antibiotic of choice for treatment of whooping cough and in case of emergence of B. pertussis and/or B. parapertussis strains erythromycin resistant, can be replaced by azithromycin.