the susceptibilities of 121 streptococcal strains isolated from patients with infective endocarditis to mezlocillin , piperacillin , ceftizoxime , ceftriaxone , ceftazidime , imipenem , ciprofloxacin , ofloxacin and pefloxacin were determined by the agar dilution technique .
C0014121
infective endocarditis
C0020933
imipenem