title: Variations in ceftazidime and amoxicillin-clavulanate susceptibilities within a clonal infection of Burkholderia pseudomallei.
abstract: A patient with a clonal infection of Burkholderia pseudomallei had subpopulations with ceftazidime and amoxicillin-clavulanate susceptibilities that differed among the clinical specimens. Resistance was associated with a novel Cys69Tyr substitution in the Ambler class A beta-lactamase. Susceptibility testing of multiple colony variants from different sites should be performed for patients with culture-confirmed melioidosis.
authors.affiliation: Department of Medical Microbiology, Faculty of Medicine, Tropical Infectious Diseases Research and Education Centre, Universiti Malaya, Kuala Lumpur, Malaysia. wicsam@doctors.net.uk
authors.forename: I-Ching
authors.initials: IC
authors.lastname: Sam
authors.forename: Kah Heng
authors.initials: KH
authors.lastname: See
authors.forename: Savithri D
authors.initials: SD
authors.lastname: Puthucheary
mesh_terms: D019943:Amino Acid Substitution; D019980:Amoxicillin-Potassium Clavulanate Combination / Q000494:pharmacology*; D000900:Anti-Bacterial Agents / Q000494:pharmacology*; D001426:Bacterial Proteins / Q000235:genetics; D016957:Burkholderia pseudomallei / Q000187:drug effects* / Q000302:isolation & purification; D002442:Ceftazidime / Q000494:pharmacology*; D004269:DNA, Bacterial / Q000737:chemistry / Q000235:genetics; D006801:Humans; D008297:Male; D008554:Melioidosis / Q000382:microbiology*; D008826:Microbial Sensitivity Tests; D008875:Middle Aged; D008969:Molecular Sequence Data; D020125:Mutation, Missense; D017422:Sequence Analysis, DNA; D001618:beta-Lactamases / Q000235:genetics
chemical_list: D000900:Anti-Bacterial Agents; D001426:Bacterial Proteins; D004269:DNA, Bacterial; D019980:Amoxicillin-Potassium Clavulanate Combination; D002442:Ceftazidime; D001618:beta-Lactamases