PL
W ciągu trzech miesięcy (kwiecień-czerwiec 1997) wyhodowano z próbek materiału klinicznego 200 szczepów pałeczek Gram-ujemnych. Próbki pochodziły od pacjentów hospitalizowanych w różnych oddziałach PSK Nr 1 w Warszawie. Najczęściej izolowano szczepy gatunku Pseudomonas aeruginosa. Wśród pałeczek Gram-ujemnych znaleziono 30 szczepów produkujących ß-laktamazy o rozszerzonym spektrum substratowym (ESBL) i 45 szczepów wytwarzających ß-laktamazy indukowane (IBL).
EN
This study was undertaken to check the situation concerning the occurrence of Gram-negative rods producing extended-spectrum ß-lactamases (ESBL) and inducible ß-lactamases (IBI) in clinical specimens from patients hospitalized in National Clinical Hospital No. 1 in Warsaw. Such determinations were not performed in this hospital so far. During three months (April-June, 1997) 200 strains of Gram-negative rods were cultured. The strains were identified in automatic ATB system using strips with biochemical tests: ID 32 E for enteric rods and ID 32 GN for non-fermenting rods. ESBL-producing strains were detected with double disc diffusion test according to Jarlier et al. (1988). Clavulanate was applied as the inhibitor of ß-lactamases (AMO/CLAV disc). Inducible ß-lactamases were determined using double disc method according to Sanders and Sanders (1979). Cefoxitin was the inductor of these ß-lactamases. 82 strains (41% of all strains) belonging to Enterobacteriaceac family, 92 strains (46%) of Pseudomonadaceae rods and 26 strains (13%) of other Grant-negative rods were isolated. 30 ESBL producing strains (15% of all strains) and 45 strains (22,5%) with IBL activity were detected. The obtained results confirm the necessity of continuous and reliable monitoring of ESBL - and IBL - producing strains among Gram-negative rods isolated from clinical materials. The aims of such procedure are the control and prevention of their dissemination within a hospital as well as the avoidance of therapeutic failures.