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Isolation, characterization and in vivo efficacy of Escherichia phage myPSH1131
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Isolation, characterization and in vivo efficacy of Escherichia phage myPSH1131
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Isolation, characterization and in vivo efficacy of Escherichia phage myPSH1131
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Journal Article
Isolation, characterization and in vivo efficacy of Escherichia phage myPSH1131
2018
Overview
Phage therapy is the use of lytic bacteriophages to cure infections caused by bacteria. The aim of this study is to isolate and to characterize the bacteriophages against Escherichia coli isolated from clinical samples. For isolation of bacteriophages, water samples were collected from the Ganges River, and phage enrichment method was followed for phage isolation. Microbiological, genomic and lyophilization experiments were carried out to characterize the bacteriophage. Galleria mellonella was used to study the potential of phages against E. coli infection. Escherichia phage myPSH1131 belonging to Podoviridae family and found to have broad host range infectivity (n = 31) to infect Enterohemorrhagic E. coli (n = 9), Enteropathogenic E. coli (n = 6), Enterotoxigenic E. coli (n = 3), Enteroaggregative E. coli (n = 3), Uropathogenic E. coli (n = 9) and one unknown E. coli. The genome size is 76,163 base pairs (97 coding regions) and their genes show high similarity to SU10 phage. Lyophilization studies showed that the use of 1M sucrose, 2% gelatin and the combination of both 0.5M sucrose plus 1% gelatin could restore phage viability up to 20 months at 4°C. For in vivo studies, it was observed that a single phage dose can reduce the E. coli infection but to achieve 100% survival rate the infected larvae should be treated with three phage doses (20 μL, 10(3) PFU/mL) at 6 hours interval. The characterized Escherichia phage myPSH1131 was found to have broad host range activity against E. coli pathogens and in vivo studies showed that multiple doses are required for effective treatment.
Publisher
Public Library of Science,Public Library of Science (PLoS)
Subject
/ Bacteria
/ E coli
/ Escherichia coli Infections - prevention & control
/ Ethics
/ Gelatin
/ Genomes
/ Larvae
/ Medicine and Health Sciences
/ Phages
/ Podoviridae - classification
/ Podoviridae - isolation & purification
/ Research and Analysis Methods
/ Rivers
/ Studies
/ Sucrose
/ Sugar
/ Survival
