Identification of novel bacteriophage vB_EcoP-EG1 with lytic activity against planktonic and biofilm forms of uropathogenic Escherichia coli
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Urinary tract infections are one of the most common infectious diseases worldwide. Uropathogenic Escherichia coli (UPEC) is a major cause of unary tract infection. Due to increasing prevalence of multidrug resistance, alternative methods to eradicate the UPECs are urgently needed. In this respect, phage therapy has been demonstrated to be a good candidate. Here, we described a novel bacteriophage named vB_EcoP-EG1, which can infect several strains of UPEC. Phage morphology and genome sequencing analysis show that vB_EcoP-EG1 belongs to the T7-like Podoviridae. vB_EcoP-EG1 possesses a genome (39,919 bp) containing 51 predicted genes and 149 bp terminal repeats. vB_EcoP-EG1 genome does not encode toxic proteins or proteins related to lysogeny. And no known virulent proteins were found in purified phage particles by mass spectrometry. vB_EcoP-EG1 appeared to be relatively specific and sensitive to clinical UPEC strains, which could infect 10 out of 21 clinical multidrug-resistant UPEC strains. In addition, vB_EcoP-EG1 suspension can eliminate biofilm formed by E. coli MG1655 and multidrug-resistant UPEC strain 390G7. Therefore, we concluded that vB_EcoP-EG1 has desirable characteristics for potential therapy, which may serve as an alternative to antibiotic therapy against urinary tract infections caused by multidrug-resistant UPEC.
KeywordsPhage Unary tract infection Genome sequencing Mass spectrometry UPEC
We would like to thank Dr. Xuesen Zhang (Nanjing Medical University) for providing assistance with the English grammar.
This work was supported by the National Natural Science Foundation of China (81501797) and the Natural Science Foundation of Jiangsu Province (BK20151558).
Compliance with ethical standards
Conflict of interest
The authors declare that they have no conflict of interest.
Human and animal rights and informed consent
Clinical strains were isolated from clinical samples of patients in the First Affiliated Hospital of Nanjing Medical University, Nanjing, China.
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