Characterization and genomics analysis of phage PGX1 against multidrug-resistant enterotoxigenic E.coli with in vivo and in vitro efficacy assessment  

作　　者：Dayue Hu Ping Qian Dongyang Gao Xinxin Li Linkang Wang Hongyue Ji Shuang Wang Xiangmin Li 

机构地区：[1]National Key Laboratory of Agricultural Microbiology,Hubei Hongshan Laboratory,Huazhong Agricultural University,Wuhan 430070,China [2]The Cooperative Innovation Centre for Sustainable Pig Production,Huazhong Agricultural University,Wuhan 430070,China [3]College of Veterinary Medicine,Huazhong Agricultural University,Wuhan 430070,China

出　　处：《Animal Diseases》2025年第1期85-100,共16页动物疾病(英文)

基　　金：supported by grants from the National Program on Key Research Project of China[2022YFD1800800,2021YFD1800300];the Yingzi Tech&Huazhong Agricultural University Intelligent Research Institute of Food Health[No.IRIFH202209,No.IRIFH202301];The National Program on Key Research Project of China,2022YFD1800800,Ping Qian,2021YFD1800300,Ping Qian,The Yingzi Tech&Huazhong Agricultural University Intelligent Research Institute of Food Health,IRIFH202209,Ping Qian,IRIFH202301,Ping Qian.

摘　　要：Enterotoxigenic E.coli is one of the bacterial pathogens contributing to the global resistance crisis in public health and animal husbandry.The problem of antibiotic resistance is becoming more and more serious,and phage is con-sidered one of the potential alternatives to antibiotics that could be utilized to treat bacterial infections.Our study isolated and identified a lytic phage PGX1 against multidrug-resistant enterotoxigenic E.coli EC6 strain from sew-age.The phage lysis profile revealed that PGX1 exhibited a lytic effect on multidrug-resistant enterotoxigenic E.coli strains of serotype O60.Through phage whole genome sequencing and bioinformatics analysis,PGX1 was found to be the class Caudoviricetes,family Autographiviridae,genus Teseptimavirus.The length of the PGX1 genome is about 37,009 bp,containing 54 open reading frames(ORFs).Notably,phage PGX1 lacks any lysogenic-related genes or virulence genes.Furthermore,phage PGX1 demonstrates strong adaptability,tolerance,and stability in various pH(pH4-10)and temperatures(4–40°C).The in vivo and in vitro tests demonstrated that phage PGX1 significantly removes and inhibits the formation of multidrug-resistant EC6 biofilm and effectively controls the Galleria mel-lonella larvae and enterotoxigenic E.coli EC6 during mice infection.In conclusion,the above findings demonstrated that phage PGX1 may be a novel antimicrobial agent to control multidrug-resistant E.coli infections.

关 键 词：Enterotoxigenic E.coli Multidrug-resistant bacteria Phage PGX1 

分 类 号：Q93[生物学—微生物学]