Journal
JOURNAL OF MEDICAL MICROBIOLOGY
Volume 67, Issue 3, Pages 376-386Publisher
MICROBIOLOGY SOC
DOI: 10.1099/jmm.0.000683
Keywords
Shigellosis; Siphoviridae; T1virus; phage therapy; Shigella flexneri; Shigella sonnei
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Funding
- University of Isfahan [A/94/32650]
- Jiangsu Agricultural Science and Technology Foundation [CX (16) 1060]
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Purpose. Shigellosis is one of the most important food-borne and water-borne diseases worldwide. Although antibiotics are considered as efficient agents for shigellosis treatment, improper use of these has led to the emergence of antibiotic-resistant Shigella spp. Therefore, finding a new strategy as alternative treatment seems necessary. Methodology. Different samples from a wastewater treatment plant were used to isolate Shigella spp. specific phages. Physiological properties were determined, and genomic analysis was also carried out. Results. A virulent Siphoviridae bacteriophage, vB_SsoS-ISF002, was isolated from urban wastewater in Iran and showed infectivity to different isolates of both Shigella sonnei and Shigella flexneri. vB_SsoS-ISF002 was stable at different pH values and temperatures. It had a short latent period (15 min), a large burst size (76 +/- 9 p.f.u. cell(-1)) and appropriate lytic activity especially at high MOI. Its genome (dsDNA) was 50 564 bp with 45.53% GC content and 76 predicted open reading frames. According to comparative genomic analysis and phylogenic tree construction, vB_SsoS-ISF002 was considered as a member of the T1virus genus. Conclusion. These results indicated that vB_SsoS-ISF002 is a novel virulent T1virus phage and may have potential as an alternative treatment for shigellosis.
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