Unknown

Dataset Information

0

The susceptibility of Pseudomonas aeruginosa strains from cystic fibrosis patients to bacteriophages.


ABSTRACT: Phage therapy may become a complement to antibiotics in the treatment of chronic Pseudomonas aeruginosa infection. To design efficient therapeutic cocktails, the genetic diversity of the species and the spectrum of susceptibility to bacteriophages must be investigated. Bacterial strains showing high levels of phage resistance need to be identified in order to decipher the underlying mechanisms. Here we have selected genetically diverse P. aeruginosa strains from cystic fibrosis patients and tested their susceptibility to a large collection of phages. Based on plaque morphology and restriction profiles, six different phages were purified from "pyophage", a commercial cocktail directed against five different bacterial species, including P. aeruginosa. Characterization of these phages by electron microscopy and sequencing of genome fragments showed that they belong to 4 different genera. Among 47 P. aeruginosa strains, 13 were not lysed by any of the isolated phages individually or by pyophage. We isolated two new phages that could lyse some of these strains, and their genomes were sequenced. The presence/absence of a CRISPR-Cas system (Clustered Regularly Interspaced Short Palindromic Repeats and Crisper associated genes) was investigated to evaluate the role of the system in phage resistance. Altogether, the results show that some P. aeruginosa strains cannot support the growth of any of the tested phages belonging to 5 different genera, and suggest that the CRISPR-Cas system is not a major defence mechanism against these lytic phages.

SUBMITTER: Essoh C 

PROVIDER: S-EPMC3634792 | biostudies-literature | 2013

REPOSITORIES: biostudies-literature

altmetric image

Publications

The susceptibility of Pseudomonas aeruginosa strains from cystic fibrosis patients to bacteriophages.

Essoh Christiane C   Blouin Yann Y   Loukou Guillaume G   Cablanmian Arsher A   Lathro Serge S   Kutter Elizabeth E   Thien Hoang Vu HV   Vergnaud Gilles G   Pourcel Christine C  

PloS one 20130424 4


Phage therapy may become a complement to antibiotics in the treatment of chronic Pseudomonas aeruginosa infection. To design efficient therapeutic cocktails, the genetic diversity of the species and the spectrum of susceptibility to bacteriophages must be investigated. Bacterial strains showing high levels of phage resistance need to be identified in order to decipher the underlying mechanisms. Here we have selected genetically diverse P. aeruginosa strains from cystic fibrosis patients and test  ...[more]

Similar Datasets

| S-EPMC5075080 | biostudies-literature
| S-EPMC5853491 | biostudies-literature
| S-EPMC7212370 | biostudies-literature
2007-12-22 | GSE5560 | GEO
| S-EPMC6985751 | biostudies-literature
2015-10-14 | PXD002865 | Pride
| S-EPMC5700896 | biostudies-other
2010-06-30 | E-GEOD-5560 | biostudies-arrayexpress
2021-11-29 | MSV000088468 | MassIVE
| S-EPMC2587363 | biostudies-literature