Abstract
In this study, it was aimed to determine the phylogroups of Escherichia coli isolates from horse, cat, dog, sheep, cattle, and chicken feces samples and to investigate some important virulence genes of the isolates. For this purpose, a total of 600 feces samples, 100 from each animal species, were used as material. For the isolation of E.coli, feces samples were directly inoculated on MacConkey agar. The identification of the isolates was performed via phenotypic tests and species-specific multiplex Polymerase Chain Reaction (mPCR) method. PCR methods were used to phylotype E.coli isolates and to investigate virulence genes (bfpA, eaeA, LT, ST, Stx1, and Stx2). Of the total 600 E.coli isolates recovered in this study, 120 (20%), 269 (44.8%), 58 (9.7%), 19 (3.2%), 35 (5.8%), 56 (9.3%), 31 (5.2%), and 12 (2%) were identified as phylogroup A, B1, B2, C, D, E, F, and Escherichia clade I, respectively. While the virulence gene was detected in 149 (24.8%) E.coli isolates, no virulence gene was detected in 451 (75.2%) isolates. According to the analysis results, the most determined virulence gene was Stx1, while the least determined virulence gene was LT. In conclusion, in this study, when both the animal species and the number of E.coli isolates examined are considered, the data obtained are of great importance in epidemiological terms. However, the detection of virulence genes in 13.5% among phylogroup A, B1, and C isolates with commensal characteristics suggest that these isolates may show pathogenic characteristics with the virulence genes they contain.
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Acknowledgements
The study was produced from a doctoral-PhD thesis performed by Emre KARAKAYA. Also, we would like to thank Dr. Elif CELIK for carrying out statistical analyses of our findings.
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EK and FA conceived and designed the study; EK, FA, and SA contributed to the execution of analyses; EK, FA, and TK contributed to molecular analyses; EK and SA contributed to manuscript writing, drawing of figures, and editing. All authors read and approved the final manuscript.
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Karakaya, E., Aydin, F., Kayman, T. et al. Escherichia coli in different animal feces: phylotypes and virulence genes. World J Microbiol Biotechnol 39, 14 (2023). https://doi.org/10.1007/s11274-022-03451-w
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DOI: https://doi.org/10.1007/s11274-022-03451-w