title: Differentiation of polyvalent bacteriophages specific to uropathogenic Proteus mirabilis strains based on the host range pattern and RFLP.
abstract: Urinary tract infections (UTIs) caused by P. mirabilis are difficult to cure because of the increasing antimicrobial resistance of these bacteria. Phage therapy is proposed as an alternative infection treatment. The aim of this study was to isolate and differentiate uropathogenic P. mirabilis strain specific polyvalent bacteriophages producing polysaccharide depolymerases (PDs). 51 specific phages were obtained. The plaques of 29 bacteriophages were surrounded by halos, which indicated that they produced PDs. The host range analysis showed that, except phages 58B and 58C, the phage host range profiles differed from each other. Phages 35 and 45 infected all P. mirabilis strains tested. Another 10 phages lysed more than 90% of isolates. Among these phages, 65A, 70, 66 and 66A caused a complete lysis of the bacterial lawn formed by 62% to 78% of strains. Additionally, phages 39A and 70 probably produced PDs. The phages' DNA restriction fragment length polymorphism (RFLP) analysis demonstrated that genomes of 51 isolated phages represented 34 different restriction profiles. DNA of phage 58A seemed to be resistant to selected EcoRV endonuclease. The 33 RFLP-EcoRV profiles showed a Dice similarity index of 38.8%. 22 RFLP patterns were obtained from single phage isolates. The remaining 12 restriction profiles consisted of 2 to 4 viruses. The results obtained from phage characterization based on the pattern of phage host range in combination with the RFLP method enabled effective differentiation of the studied phages and selection of PD producing polyvalent phages for further study.
authors.affiliation: Department of Immunobiology of Bacteria, Faculty of Biology and Environmental Protection, University of Lodz, Łódź, Poland.
authors.forename: Agnieszka
authors.initials: A
authors.lastname: Maszewska
authors.affiliation: Proteon Pharmaceuticals SA, Łódź, Poland.
authors.forename: Ewelina
authors.initials: E
authors.lastname: Wójcik
authors.affiliation: Department of Immunobiology of Bacteria, Faculty of Biology and Environmental Protection, University of Lodz, Łódź, Poland.
authors.forename: Aneta
authors.initials: A
authors.lastname: Ciurzyńska
authors.affiliation: Proteon Pharmaceuticals SA, Łódź, Poland.
authors.forename: Arkadiusz
authors.initials: A
authors.lastname: Wojtasik
authors.affiliation: Department of Immunobiology of Bacteria, Faculty of Biology and Environmental Protection, University of Lodz, Łódź, Poland.
authors.forename: Iwona
authors.initials: I
authors.lastname: Piątkowska
authors.affiliation: Proteon Pharmaceuticals SA, Łódź, Poland; Laboratory of Cellular Immunology, Institute of Medical Biology, Polish Academy of Sciences, Łódź, Poland.
authors.forename: Jarosław
authors.initials: J
authors.lastname: Dastych
authors.affiliation: Department of Immunobiology of Bacteria, Faculty of Biology and Environmental Protection, University of Lodz, Łódź, Poland.
authors.forename: Antoni
authors.initials: A
authors.lastname: Różalski
mesh_terms: D001435:Bacteriophages / Q000502:physiology*; D018441:Biofilms; D055499:Catheter-Related Infections / Q000382:microbiology; D004279:DNA, Viral / Q000235:genetics; D058507:Host Specificity; D006801:Humans; D058889:Molecular Typing; D010802:Phylogeny; D012150:Polymorphism, Restriction Fragment Length; D011513:Proteus mirabilis / Q000821:virology*; D062885:Urinary Catheters / Q000382:microbiology; D014552:Urinary Tract Infections / Q000382:microbiology
chemical_list: D004279:DNA, Viral