Article (Scientific journals)
Impact of Shiga-toxin encoding gene transduction from O80:H2 Shiga toxigenic Escherichia coli (STEC) on non-STEC strains.
Habets, Audrey; Antoine, Céline; Wagemans, Jeroen et al.
2022In Scientific Reports, 12 (1), p. 21587
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Keywords :
Shiga Toxin; Humans; Shiga Toxin/genetics; Virulence/genetics; Shiga-Toxigenic Escherichia coli; Escherichia coli Infections; Hemolytic-Uremic Syndrome; Bacteriophages/metabolism; Bacteriophages; Virulence; Multidisciplinary
Abstract :
[en] Shiga toxin-producing Escherichia coli (STEC) are major foodborne pathogens that cause human diseases ranging from diarrhea to life-threatening complications including hemolytic-uremic syndrome. Virulence of STEC strains and their ability to cause severe diseases are associated with the activity of prophage-encoded Shiga toxins (Stxs). The first objective of this work was to isolate and characterize the Stx2d phage from STEC O80:H2 and to study the transfer of this phage in non-STEC strains. The second objective was to assess the survival of Galleria mellonella larvae inoculated with these transduced strains. Firstly, one bacteriophage isolated from a STEC O80:H2 strain was used to infect six non-STEC strains, resulting in the conversion of three strains. Then, stability assays were performed, showing that this phage was stable in the new STEC strains after three successive subculturing steps, as confirmed by a combination of short and long read genome sequencing approaches. This phage, vB_EcoS_ULI-O80_Stx2d, is resistant to moderate temperature and pH. It belongs to a currently unclassified genus and family within the Caudoviricetes class, shares 98% identity with Stx2_112808 phage and encodes several proteins involved in the lysogenic cycle. The yecE gene was identified at the insertion site. Finally, G. mellonella experiments showed that the transduced strains caused significantly higher mortality rates than the corresponding non-STEC strains. In conclusion, this study showed that stx2d gene from O80:H2 E. coli can be transferred to non-STEC strains and contributes to their virulence.
Disciplines :
Veterinary medicine & animal health
Author, co-author :
Habets, Audrey  ;  Université de Liège - ULiège > Fundamental and Applied Research for Animals and Health (FARAH)
Antoine, Céline ;  Université de Liège - ULiège > Fundamental and Applied Research for Animals and Health (FARAH)
Wagemans, Jeroen;  Laboratory of Gene Technology, Department of Biosystems, KU Leuven, 3000, Leuven, Belgium
Vermeersch, Marjorie;  Electron Microscopy Laboratory, Center for Microscopy and Molecular Imaging, ULB, 6041, Gosselies, Belgium
Laforêt, Fanny ;  Université de Liège - ULiège > Fundamental and Applied Research for Animals and Health (FARAH)
Diderich, Jacob  ;  Université de Liège - ULiège > Fundamental and Applied Research for Animals and Health (FARAH) > FARAH: Santé publique vétérinaire
Lavigne, Rob;  Laboratory of Gene Technology, Department of Biosystems, KU Leuven, 3000, Leuven, Belgium
Mainil, Jacques ;  Université de Liège - ULiège > Département des maladies infectieuses et parasitaires (DMI)
Thiry, Damien ;  Université de Liège - ULiège > Département des maladies infectieuses et parasitaires (DMI) > Bactériologie vétérinaire et maladies bactériennes animales
Language :
English
Title :
Impact of Shiga-toxin encoding gene transduction from O80:H2 Shiga toxigenic Escherichia coli (STEC) on non-STEC strains.
Publication date :
14 December 2022
Journal title :
Scientific Reports
eISSN :
2045-2322
Publisher :
Nature Research, England
Volume :
12
Issue :
1
Pages :
21587
Peer reviewed :
Peer Reviewed verified by ORBi
Funding text :
The authors thank David Perez-Morga (CMMI, ULB) for the collaboration for the transmission electron microscopy. The CMMI is supported by the European Regional Development Fund and the Walloon Region. The authors also thank Dr Marc Saulmont from ARSIA for providing O80:H2 E. coli strains. The university of Liège provided financial support (‘Fonds Spéciaux de la Recherche Project HYBRID_COLI_O80’).
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since 19 January 2023

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