Characterization and in vitro testing of newly isolated lytic bacteriophages for the biocontrol of Pseudomonas aeruginosa

Liliam K. Harada, Erica C. Silva, Fernando P.N. Rossi, Basilio Cieza, Thais J. Oliveira, Carla Pereira, Geizecler Tomazetto, Bianca B. Silva, Fabio M. Squina, Marta M.D.C. Vila, João C. Setubal, Taekjip Ha, Aline M. Da Silva, Victor M. Balcão

Research output: Contribution to journalArticlepeer-review

Abstract

Aim: Two lytic phages were isolated using P. aeruginosa DSM19880 as host and fully characterized. Materials & methods: Phages were characterized physicochemically, biologically and genomically. Results & conclusion: Host range analysis revealed that the phages also infect some multidrug-resistant (MDR) P. aeruginosa clinical isolates. Increasing MOI from 1 to 1000 significantly increased phage efficiency and retarded bacteria regrowth, but phage ph0034 (reduction of 7.5 log CFU/ml) was more effective than phage ph0031 (reduction of 5.1 log CFU/ml) after 24 h. Both phages belong to Myoviridae family. Genome sequencing of phages ph0031 and ph0034 showed that they do not carry toxin, virulence, antibiotic resistance and integrase genes. The results obtained are highly relevant in the actual context of bacterial resistance to antibiotics.

Original languageEnglish (US)
Pages (from-to)111-141
Number of pages31
JournalFuture microbiology
Volume17
Issue number2
DOIs
StatePublished - Jan 2022

Keywords

  • bacteria-phage inactivation
  • bacteriophage
  • genomic structural features
  • multidrug-resistant P. aeruginosa
  • physicochemical/biological/genomic characterization

ASJC Scopus subject areas

  • Microbiology
  • Microbiology (medical)

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