PL
Praca porównuje wrażliwość in vitro bakteryjnych szczepów szpitalnych na działanie piperacyliny z tazobactamem w stosunku do samej piperacyliny. Stwierdzono duże zróżnicowanie wrażliwości na te preparaty pałeczek Gram-ujemnych z rodziny Enterobacteriaceae oraz rodzaju Staphylococcus (MSS). W obrębie pałeczek Gram-ujemnych niefermentujących, enterokoków i beztlenowców nie stwierdzono żadnych różnic we wrażliwości na badane preparaty.
EN
Due to increasing frequency of infections caused by pathogenes that are resistant to ß-lactame antibiotics, combinations of such antibiotics and ß-lactamase inhibitors were introduced into therapy in last few years. Tazobactam is the most potent ß-lactamse inhibitor. The purpose of the study was to evaluate in vitro susceptibility to piperacyllin and piperacillin with tazobactam of 256 isolates cultured from biological samples obtained from 203 patients. The biological materials obtained were as follows: urine (44,9%), post-operative and post¬traumatic wound swabs (27,3%), BAL (12,1%), blood (6,6%), drain swabs and other (5,5%). The isolates predominantly found were Escherichia coli (22,3%), Pseudomonas aeruginosa (16,0%), Staphylococcus aureus MSSA (13,7%), Proteus mirabilis (11,7%) and other. There were 95,5% of strains found susceptible to piperacillin with tazobactam and only 4,3% resistant ones. On the other hand, piperacillin only susceptible strains were 59,4% and resistant ones in 40,6%. Great differences in susceptibility to examined antimicrobial agents were observed in Ente¬robacteriaceae family and Staphylococcus (MSS) genus. There were no differences in susceptibility to piperacillin and tazobactam and piperacillin alone in anaerobic Enterobacteriaceae strains and non-fermenting Gram-negative bacilli.