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Colistin-Resistant Acinetobacter baumannii Clinical Strains with Deficient Biofilm Formation.


ABSTRACT: In two pairs of clinical colistin-susceptible/colistin-resistant (Cst(s)/Cst(r)) Acinetobacter baumannii strains, the Cst(r) strains showed significantly decreased biofilm formation in static and dynamic assays (P < 0.001) and lower relative fitness (P < 0.05) compared with those of the Cst(s) counterparts. The whole-genome sequencing comparison of strain pairs identified a mutation converting a stop codon to lysine (*241K) in LpsB (involved in lipopolysaccharide [LPS] synthesis) in one Cst(r) strain and a frameshift mutation in CarO and the loss of a 47,969-bp element containing multiple genes associated with biofilm production in the other.

SUBMITTER: Dafopoulou K 

PROVIDER: S-EPMC4776000 | biostudies-literature | 2015 Dec

REPOSITORIES: biostudies-literature

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Colistin-Resistant Acinetobacter baumannii Clinical Strains with Deficient Biofilm Formation.

Dafopoulou Konstantina K   Xavier Basil Britto BB   Hotterbeekx An A   Janssens Lore L   Lammens Christine C   Dé Emmanuelle E   Goossens Herman H   Tsakris Athanasios A   Malhotra-Kumar Surbhi S   Pournaras Spyros S  

Antimicrobial agents and chemotherapy 20151214 3


In two pairs of clinical colistin-susceptible/colistin-resistant (Cst(s)/Cst(r)) Acinetobacter baumannii strains, the Cst(r) strains showed significantly decreased biofilm formation in static and dynamic assays (P < 0.001) and lower relative fitness (P < 0.05) compared with those of the Cst(s) counterparts. The whole-genome sequencing comparison of strain pairs identified a mutation converting a stop codon to lysine (*241K) in LpsB (involved in lipopolysaccharide [LPS] synthesis) in one Cst(r) s  ...[more]

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