ORIGINAL RESEARCH article
Front. Microbiol.
Sec. Phage Biology
This article is part of the Research TopicTargeted Bacteriophage Strategies for Safer Foods: Efficacy, Resistance, and Scale-UpView all articles
From Structure to Therapy: Two Novel Bacteriophages from Swine Wastewater with Divergent Genomes Converge in Combating Escherichia coli and Salmonella Infections
Provisionally accepted
Liyuan Zhang1
Yuqi Zhou1Di Li1Xiaojing Zhuo1Shuang Li1Shaoshuai Ma1Ziyi Zhang1Wenqi Su2
Tingrong Luo1Hongyun Zhang1*
Jingjing Liang1*Xiaoning Li1*- 1Guangxi University, Nanning, China
- 2Bama County Center for Animal Disease Prevention and Control, Hechi, China
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Swine wastewater, characterized by a high bacterial density and significant pressure on antibiotic selection, serves as a distinct reservoir for various bacteriophages. In this study, we report the simultaneous isolation and identification of two novel bacteriophages, vB_EcoM_BYEP01 and vB_SalS_SP14, from a single pig wastewater sample. These phages specifically target original host strain Escherichia coli BYEC01 and S. enterica ATCC 14028, respectively. Both phages exhibit activity within the temperature range of 30–50 °C and remain stable over a pH range of 6–10. Transmission electron microscopy revealed that vB_EcoM_BYEP01 belongs to the Myoviridae family and vB_SalS_SP14 to Microviridae. Whole-genome sequencing and comparative analyses further confirmed these phylogenetic differences. Notably, despite these significant structural and genomic differences, both bacteriophages demonstrated efficient lytic life cycles. They lack genes associated with toxins or antibiotic resistance, while demonstrating biological safety. They share key functional characteristics, including rapid adsorption rates, short incubation periods, and large outbreak sizes, highlighting their efficacy as potent bacterial killers. Both bacteriophages can be combined with antibiotics to enhance antibacterial activity and demonstrate protective effects in food (such as milk and pig skin) and mouse infection models. The coexistence of these unrelated yet highly effective bacteriophages within a single microenvironment highlights the inherent functional redundancy and evolutionary adaptability of bacteriophages. This study provides valuable insights for developing targeted phage cocktail therapies against multiple bacterial pathogens.
Keywords: Bacteriophage therapy, Environmental Microbiology, Escherichia coli, Microviridae, Myoviridae
Received: 09 Dec 2025; Accepted: 28 Jan 2026.
Copyright: © 2026 Zhang, Zhou, Li, Zhuo, Li, Ma, Zhang, Su, Luo, Zhang, Liang and Li. This is an open-access article distributed under the terms of the Creative Commons Attribution License (CC BY). The use, distribution or reproduction in other forums is permitted, provided the original author(s) or licensor are credited and that the original publication in this journal is cited, in accordance with accepted academic practice. No use, distribution or reproduction is permitted which does not comply with these terms.
* Correspondence:
Hongyun Zhang
Jingjing Liang
Xiaoning Li
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