Genomic Characterization of Colistin Heteroresistance in Klebsiella pneumoniae during a Nosocomial Outbreak
نویسندگان
چکیده
منابع مشابه
Colistin heteroresistance in carbapenemase-producing Klebsiella pneumoniae.
Sir, Klebsiella pneumoniae is an important pathogen that causes severe and life-threatening infections. Most isolates demonstrate resistance to various antimicrobial agents. Carbapenems have been widely used to treat serious infections with multidrug-resistant K. pneumoniae. However, the increasing use of these compounds has led to the emergence of carbapenem-resistant isolates via acquired gen...
متن کاملGenomic analysis of the emergence and evolution of multidrug resistance during a Klebsiella pneumoniae outbreak including carbapenem and colistin resistance.
OBJECTIVES To characterize at the genomic level the evolution of multiresistance during an outbreak of Klebsiella pneumoniae in a burns intensive care unit. The outbreak involved a DHA-1 β-lactamase-producing strain that later acquired carbapenem and fosfomycin resistance, and in one case colistin resistance. METHODS The genomes of two isolates were sequenced and compared with a previously se...
متن کاملHeteroresistance to colistin in Klebsiella pneumoniae associated with alterations in the PhoPQ regulatory system.
A multidrug-resistant Klebsiella pneumoniae isolate exhibiting heteroresistance to colistin was investigated. The colistin-resistant subpopulation harbored a single amino acid change (Asp191Tyr) in protein PhoP, which is part of the PhoPQ two-component system that activates pmrHFIJKLM expression responsible for l-aminoarabinose synthesis and polymyxin resistance. Complementation assays with a w...
متن کاملLarge Nosocomial Outbreak of Colistin-Resistant, Carbapenemase-Producing Klebsiella pneumoniae Traced to Clonal Expansion of an mgrB Deletion Mutant.
We describe a large hospital outbreak (93 bloodstream infections) of colistin-resistant Klebsiella pneumoniae carbapenemase (KPC)-producing K. pneumoniae isolates which was mirrored by increased colistin consumption. The outbreak was mostly traced to the clonal expansion of an mgrB deletion mutant of an ST512 strain that produced KPC-3.
متن کاملNosocomial outbreak of Klebsiella pneumoniae carbapenemase-producing Klebsiella oxytoca in Austria.
To date, no outbreak of carbapenemase-producing bacteria has been reported for Austria. While outbreaks of Klebsiella pneumoniae carbapenemase (KPC)-producing K. pneumoniae have been increasingly reported, no outbreak caused by KPC-producing Klebsiella oxytoca has been described yet, to the best of our knowledge. We report an outbreak of KPC-producing K. oxytoca. In 5 months, 31 KPC-producing K...
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ژورنال
عنوان ژورنال: Antimicrobial Agents and Chemotherapy
سال: 2016
ISSN: 0066-4804,1098-6596
DOI: 10.1128/aac.01344-16