{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,9,30]],"date-time":"2026-09-30T02:27:41Z","timestamp":1790735261051,"version":"4.1.0"},"reference-count":60,"publisher":"MDPI AG","issue":"10","license":[{"start":{"date-parts":[[2021,10,6]],"date-time":"2021-10-06T00:00:00Z","timestamp":1633478400000},"content-version":"vor","delay-in-days":0,"URL":"https:\/\/creativecommons.org\/licenses\/by\/4.0\/"}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["Viruses"],"abstract":"<jats:p>Extra-intestinal Escherichia coli express several virulence factors that increase their ability to colonize and survive in different localizations. The K1 capsular type is involved in several infections, including meningitis, urinary tract, and bloodstream infections. The aims of this work were to isolate, characterize, and assess the in vivo efficacy of phages targeting avian pathogenic E. coli (APEC) O18:K1, which shares many similarities with the human strains responsible for neonatal meningitis. Eleven phages were isolated against APEC O18:K1, and four of them presenting a narrow spectrum targeting E. coli K1 strains were further studied. The newly isolated phages vB_EcoS_K1-ULINTec2 were similar to the Siphoviridae family, and vB_EcoP_K1-ULINTec4, vB_EcoP_K1-ULINTec6, and vB_EcoP_K1-ULINTec7 to the Autographiviridae family. They are capsular type (K1) dependent and present several advantages characteristic of lytic phages, such as a short adsorption time and latent period. vB_EcoP_K1-ULINTec7 is able to target both K1 and K5 strains. This study shows that these phages replicate efficiently, both in vitro and in vivo in the Galleria mellonella model. Phage treatment increases the larvae survival rates, even though none of the phages were able to eliminate the bacterial load.<\/jats:p>","DOI":"10.3390\/v13102005","type":"journal-article","created":{"date-parts":[[2021,10,11]],"date-time":"2021-10-11T01:59:47Z","timestamp":1633917587000},"page":"2005","update-policy":"https:\/\/doi.org\/10.3390\/mdpi_crossmark_policy","source":"Crossref","is-referenced-by-count":23,"title":["In Vitro Characterization and In Vivo Efficacy Assessment in Galleria mellonella Larvae of Newly Isolated Bacteriophages against Escherichia coli K1"],"prefix":"10.3390","volume":"13","author":[{"given":"C\u00e9line","family":"Antoine","sequence":"first","affiliation":[{"name":"Bacteriology Laboratory, Department of Infectious and Parasitic Diseases, FARAH and Faculty of Veterinary Medicine, University of Li\u00e8ge, 4000 Li\u00e8ge, Belgium"},{"name":"Food Science Department, FARAH and Faculty of Veterinary Medicine, ULi\u00e8ge, 4000 Li\u00e8ge, Belgium"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Fanny","family":"Lafor\u00eat","sequence":"additional","affiliation":[{"name":"Bacteriology Laboratory, Department of Infectious and Parasitic Diseases, FARAH and Faculty of Veterinary Medicine, University of Li\u00e8ge, 4000 Li\u00e8ge, Belgium"},{"name":"Food Science Department, FARAH and Faculty of Veterinary Medicine, ULi\u00e8ge, 4000 Li\u00e8ge, Belgium"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Bob","family":"Blasdel","sequence":"additional","affiliation":[{"name":"V\u00e9sale Bioscience, V\u00e9sale Pharmaceutica, 5310 Noville-sur-Mehaigne, Belgium"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Abdoulaye","family":"Fall","sequence":"additional","affiliation":[{"name":"Genalyse Partner SA, En Hayeneux 62, 4040 Herstal, Belgium"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Jean-No\u00ebl","family":"Duprez","sequence":"additional","affiliation":[{"name":"Bacteriology Laboratory, Department of Infectious and Parasitic Diseases, FARAH and Faculty of Veterinary Medicine, University of Li\u00e8ge, 4000 Li\u00e8ge, Belgium"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0001-8520-0834","authenticated-orcid":false,"given":"Jacques","family":"Mainil","sequence":"additional","affiliation":[{"name":"Bacteriology Laboratory, Department of Infectious and Parasitic Diseases, FARAH and Faculty of Veterinary Medicine, University of Li\u00e8ge, 4000 Li\u00e8ge, Belgium"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"V\u00e9ronique","family":"Delcenserie","sequence":"additional","affiliation":[{"name":"Food Science Department, FARAH and Faculty of Veterinary Medicine, ULi\u00e8ge, 4000 Li\u00e8ge, Belgium"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-5161-7364","authenticated-orcid":false,"given":"Damien","family":"Thiry","sequence":"additional","affiliation":[{"name":"Bacteriology Laboratory, Department of Infectious and Parasitic Diseases, FARAH and Faculty of Veterinary Medicine, University of Li\u00e8ge, 4000 Li\u00e8ge, Belgium"}],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"1968","published-online":{"date-parts":[[2021,10,6]]},"reference":[{"key":"ref_1","doi-asserted-by":"crossref","first-page":"615","DOI":"10.1016\/j.jinf.2015.09.009","article-title":"Extra-Intestinal Pathogenic Escherichia coli (ExPEC): Disease, Carriage and Clones","volume":"71","author":"Dale","year":"2015","journal-title":"J. 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