title: Rapid identification of international multidrug-resistant Pseudomonas aeruginosa clones by multiple-locus variable number of tandem repeats analysis and investigation of their susceptibility to lytic bacteriophages.
abstract: The objective of this study was to determine the genetic diversity of multidrug-resistant (MDR) Pseudomonas aeruginosa strains isolated over a period of 12 months in two French hospitals and to test their susceptibility to bacteriophages. A total of 47 MDR isolates recovered from hospitalized patients were genotyped using multiple-locus variable number of tandem repeats analysis. The genotypes were distributed into five clones (including 19, 5, 5, 3, and 3 isolates, respectively) and 12 singletons. Comparison to 77 MDR strains from three other countries, and MLST analysis of selected isolates showed the predominance of international MDR clones. The larger clone, CC235, contained 59 isolates displaying different antibiotic resistance mechanisms, including the presence of the GES1, VIM-2, VIM-4, and IMP-1 β-lactamases. Three newly isolated P. aeruginosa bacteriophages were found to lyse 42 of the 44 analyzed strains, distributed into the different clonal complexes. This pilot study suggests that systematic genotyping of P. aeruginosa MDR strains could improve our epidemiological understanding of transmission at both the local (hospital) and the national level and that phage therapy could be an alternative or a complementary treatment to antibiotics for treating MDR-infected patients.
authors.affiliation: Service de Réanimation Polyvalente, Centre Hospitalier de Narbonne, Narbonne Cedex, France.
authors.forename: Jérôme
authors.initials: J
authors.lastname: Larché
authors.forename: Flavie
authors.initials: F
authors.lastname: Pouillot
authors.forename: Christiane
authors.initials: C
authors.lastname: Essoh
authors.forename: Balázs
authors.initials: B
authors.lastname: Libisch
authors.forename: Monica
authors.initials: M
authors.lastname: Straut
authors.forename: Je Chul
authors.initials: JC
authors.lastname: Lee
authors.forename: Charles
authors.initials: C
authors.lastname: Soler
authors.forename: Richard
authors.initials: R
authors.lastname: Lamarca
authors.forename: Elodie
authors.initials: E
authors.lastname: Gleize
authors.forename: Jérôme
authors.initials: J
authors.lastname: Gabard
authors.forename: Gilles
authors.initials: G
authors.lastname: Vergnaud
authors.forename: Christine
authors.initials: C
authors.lastname: Pourcel
mesh_terms: D000900:Anti-Bacterial Agents / Q000494:pharmacology; D001435:Bacteriophages / Q000302:isolation & purification; D003428:Cross Infection / Q000382:microbiology; D004269:DNA, Bacterial / Q000096:biosynthesis / Q000235:genetics; D004279:DNA, Viral / Q000096:biosynthesis / Q000235:genetics; D024901:Drug Resistance, Multiple, Bacterial / Q000235:genetics*; D005602:France; D005838:Genotype; D006801:Humans; D008826:Microbial Sensitivity Tests; D018598:Minisatellite Repeats; D011552:Pseudomonas Infections / Q000382:microbiology; D011550:Pseudomonas aeruginosa / Q000187:drug effects / Q000235:genetics* / Q000821:virology*
chemical_list: D000900:Anti-Bacterial Agents; D004269:DNA, Bacterial; D004279:DNA, Viral