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Article Abstract
Unlabelled: , a zoonotic pathogen causing enteric diseases in different animals and humans. A comprehensive study on the presence of toxin genes and antimicrobial resistance genes based on genome data of in animals is scanty. In the present study, a total of 15 isolates were recovered from dogs and isolates with toxin genes (D1, CD15 and CD26) along with two other non-toxigenic strains (CD28, CD32) were used for whole genome sequencing and comparative genomics. Sequence type-based clustering was noted in the whole genome phylogeny with 4 known multi-locus sequence typing (MLST) clades namely I, II, IV, and V and a cryptic clade. ST11 and ST54 were reported for the 2 time worldwide in dogs. Out of 109 genomes used in the study, 29 genomes were predicted with all four toxin genes (, , , ) while 22 did not have any of the toxin genes. ST11 of MLST clade V had the maximum number of 46 genomes predicted with at least one toxin gene. Among the genomes sequenced in this study, CD26 had a maximum of 5 AMR genes (, , , , and ) and CD15 was predicted with 2 AMR genes (, ). Tetracycline resistance genes were predicted most in the ST11 genome. Of the 22 non-toxigenic strains, 9 genomes (ST48 = 5, ST3 = 2, ST109 = 1, ST15 = 1) were predicted with a minimum of one AMR gene. Pangenome analysis indicated that the value is 0.12 showing that has an open pangenome structure. This indicates that the organism can evolve by the addition of new genes. This study reports the circulation of clinically important ST11 and multidrug-resistant non-toxigenic strains among animals.
Supplementary Information: The online version contains supplementary material available at 10.1007/s13205-024-04102-7.
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| http://www.ncbi.nlm.nih.gov/pmc/articles/PMC11452369 | PMC |
| http://dx.doi.org/10.1007/s13205-024-04102-7 | DOI Listing |
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