Genotypic versus Phenotypic Characterization, with Respect to β-Lactam Susceptibility, of Haemophilus influenzae Isolates Exhibiting Decreased Susceptibility to β-Lactam Resistance Markers

Genotypic versus Phenotypic Characterization, with Respect to β-Lactam Susceptibility, of Haemophilus influenzae Isolates Exhibiting Decreased Susceptibility to β-Lactam Resistance Markers 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 Ampicillin-Resistant Non-β-Lactamase-Producing Haemophilus influenzae in Spain: Recent Emergence of Clonal Isolates with Increased Resistance to Cefotaxime and Cefixime 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 Comparison of the Efficacies of Oral β-Lactams in Selection of Haemophilus influenzae Transformants with Mutated ftsI Genes β-Lactam Resistance in Haemophilus parasuis Is Mediated by Plasmid pB1000 Bearing bla _ROB-1 Horizontal Gene Transfer of ftsI , Encoding Penicillin-Binding Protein 3, in Haemophilus influenzae First Characterization of Heterogeneous Resistance to Imipenem in Invasive Nontypeable Haemophilus influenzae Isolates Low β-Lactamase-Negative Ampicillin-Resistant Haemophilus influenzae Strains Are Best Detected by Testing Amoxicillin Susceptibility by the Broth Microdilution Method