Comparison of the Efficacies of Oral β-Lactams in Selection of Haemophilus influenzae Transformants with Mutated ftsI Genes

Comparison of the Efficacies of Oral β-Lactams in Selection of Haemophilus influenzae Transformants with Mutated ftsI Genes In Vitro Activity of Tebipenem, a New Oral Carbapenem Antibiotic, against β-Lactamase-Nonproducing, Ampicillin-Resistant Haemophilus influenzae Ampicillin-Resistant Non-β-Lactamase-Producing Haemophilus influenzae in Spain: Recent Emergence of Clonal Isolates with Increased Resistance to Cefotaxime and Cefixime Horizontal Gene Transfer of ftsI , Encoding Penicillin-Binding Protein 3, in Haemophilus influenzae Diversity of Ampicillin Resistance Genes and Antimicrobial Susceptibility Patterns in Haemophilus influenzae Strains Isolated in Korea Genetic Characteristics and Clonal Dissemination of β-Lactamase-Negative Ampicillin-ResistantHaemophilus influenzaeStrains Isolated from the Upper Respiratory Tract of Patients in Japan Can the Etest Correctly Determine the MICs of β-Lactam and Cephalosporin Antibiotics for Beta-Lactamase-Negative Ampicillin-Resistant Haemophilus influenzae ? Antimicrobial Activities of Piperacillin-Tazobactam against Haemophilus influenzae Isolates, Including β-Lactamase-Negative Ampicillin-Resistant and β-Lactamase-Positive Amoxicillin- Clavulanate-Resistant Isolates, and Mutations in Their Quinolone Resistance-Determining Regions Genotypic versus Phenotypic Characterization, with Respect to β-Lactam Susceptibility, of Haemophilus influenzae Isolates Exhibiting Decreased Susceptibility to β-Lactam Resistance Markers Influence of TEM-1 β-Lactamase on the Pharmacodynamic Activity of Simulated Total versus Free-Drug Serum Concentrations of Cefditoren (400 Milligrams) versus Amoxicillin-Clavulanic Acid (2,000/125 Milligrams) against Haemophilus influenzae Strains Exhibiting an N526K Mutation in the ftsI Gene