In Vivo Fitness Adaptations of Colistin-Resistant Acinetobacter baumannii Isolates to Oxidative Stress
Author(s) -
Crystal L. Jones,
Shweta Singh,
Yonas A. Alamneh,
Leila G. Casella,
Robert K. Ernst,
Emil Lesho,
Paige Waterman,
Daniel V. Zurawski
Publication year - 2016
Publication title -
antimicrobial agents and chemotherapy
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 2.07
H-Index - 259
eISSN - 1070-6283
pISSN - 0066-4804
DOI - 10.1128/aac.00598-16
Subject(s) - acinetobacter baumannii , colistin , catalase , microbiology and biotechnology , oxidative stress , biology , in vivo , hydrogen peroxide , bacteria , acinetobacter , antibiotics , pseudomonas aeruginosa , genetics , biochemistry
The loss of fitness in colistin-resistant (CR) Acinetobacter baumannii was investigated using longitudinal isolates from the same patient. Early CR isolates were outcompeted by late CR isolates for growth in broth and survival in the lungs of mice. Fitness loss was associated with an increased susceptibility to oxidative stress since early CR strains had reduced in vitro survival in the presence of hydrogen peroxide and decreased catalase activity compared to that of late CR and colistin-susceptible (CS) strains.
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