Bumunang EW, McAllister TA, Polo RO, Ateba CN, Stanford K, Schlechte J, Walker M, MacLean K, Niu YD. Genomic Profiling of Non-O157 Shiga Toxigenic
Escherichia coli-Infecting Bacteriophages from South Africa.
PHAGE (NEW ROCHELLE, N.Y.) 2022;
3:221-230. [PMID:
36793886 PMCID:
PMC9917312 DOI:
10.1089/phage.2022.0003]
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Abstract
Background
Non-O157 Shiga toxigenic Escherichia coli (STEC) are one of the most important food and waterborne pathogens worldwide. Although bacteriophages (phages) have been used for the biocontrol of these pathogens, a comprehensive understanding of the genetic characteristics and lifestyle of potentially effective candidate phages is lacking.
Materials and Methods
In this study, 10 non-O157-infecting phages previously isolated from feedlot cattle and dairy farms in the North-West province of South Africa were sequenced, and their genomes were analyzed.
Results
Comparative genomics and proteomics revealed that the phages were closely related to other E. coli-infecting Tunaviruses, Seuratviruses, Carltongylesviruses, Tequatroviruses, and Mosigviruses from the National Center for Biotechnology Information GenBank database. Phages lacked integrases associated with a lysogenic cycle and genes associated with antibiotic resistance and Shiga toxins.
Conclusions
Comparative genomic analysis identified a diversity of unique non-O157-infecting phages, which could be used to mitigate the abundance of various non-O157 STEC serogroups without safety concerns.
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