ureidopenicillins

ureidopenicillins

a group of penicillins, susceptible to gastric acidity and β-lactamase, but with a greater range of activity against gram-negative bacteria, especially Pseudomonas aeruginosa. Includes azlocillin, mezlocillin and piperacillin.
References in periodicals archive ?
If these microorganisms are human pathogens, they will influence the choice of antimicrobial drugs for empiric treatment because most are resistant to carboxypenicillins, ureidopenicillins, third-generation cephalosporins, and fluoroquinolones, which are commonly used in the ICU.
baumannii to antimicrobial drugs commonly used at that time, among them aminopenicillins, ureidopenicillins, first and second-generation cephalosporins, cephamycins, most aminoglycosides, chloramphenicol, and tetracyclines (19).
d) Acinetobacter baumanni: 9 (all with the same susceptibility pattern including susceptibility to ureidopenicillins, third -generation cephalosporins, aminoglycosides, and quinolones) and Ochrobactrum spp.
Our study, by contrast, found both ureidopenicillins and [beta]-lactam/[beta]-lactamase inhibitor combinations to be risk factors for the isolation of gram-negative organisms resistant to third-generation cephalosporins.
In routine antibiotic susceptibility testing, done by disk diffusion, both isolates showed a multidrug-resistant phenotype, including ureidopenicillins, piperacillin, piperacillin-tazobactam, ceftazidime, cefoperazone, cefepime, aztreonam, ciprofloxacin, gentamicin, netilmicin, imipenem, and meropenem.
Our results (not shown) indicate that In-t2 serves as a vehicle for the oxa-1 gene, extending betalactam resistance to ureidopenicillins, and of the aadA1 gene, conferring resistance to streptomycin and spectinomycin.