of 36 multi-resistant gram-negative bacilli isolated from different cases of urinary tract infection , 18 strains of escherichia coli , klebsiella , enterobacter , proteus , providencia and serratia with the exception of acinetobacter species showed synergy when mecillinam was combined with cephradine or amoxycillin in the ratio of 1:1 .
C0042029
of
C0002645
amoxycillin