Bacteriophage-resistant Acinetobacter baumannii are resensitized to antimicrobials

Fernando Gordillo Altamirano, John H. Forsyth, Ruzeen Patwa, Xenia Kostoulias, Michael Trim, Dinesh Subedi, Stuart K. Archer, Faye C. Morris, Cody Oliveira, Luisa Kielty, Denis Korneev, Moira K. O’Bryan, Trevor J. Lithgow, Anton Y. Peleg, Jeremy J. Barr

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We characterized two bacteriophages, ΦFG02 and ΦCO01, against clinical isolates of Acinetobacter baumannii and established that the bacterial capsule is the receptor for these phages. Phage-resistant mutants harboured loss-of-function mutations in genes responsible for capsule biosynthesis, resulting in capsule loss and disruption of phage adsorption. The phage-resistant strains were resensitized to human complement, beta-lactam antibiotics and alternative phages and exhibited diminished fitness in vivo. Using a mouse model of A. baumannii infection, we showed that phage therapy was effective.

Original languageEnglish
Pages (from-to)157-161
Number of pages5
JournalNature Microbiology
Issue number2
Publication statusPublished - Feb 2021

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