In:
BMC Microbiology, Springer Science and Business Media LLC, Vol. 21, No. 1 ( 2021-12)
Abstract:
The Shiga toxin-producing Escherichia coli (STEC) represented a great risk to public health. In this study, 60 STEC strains recovered from broiler and duck fecal samples, cow’s milk, cattle beef, human urine, and ear discharge were screened for 12 virulence genes, phenotypic and genotypic antimicrobial resistance, and multiple-locus variable-number tandem-repeat analysis (MLVA). Results The majority of strains harbored Shiga toxin 1 ( stx 1 ) and stx 1d , stx 2 and stx 2e , and ehx A genes, while a minority harbored stx 2c subtype and eae A. We identified 10 stx gene combinations; most of strains 31/60 (51.7%) exhibited four copies of stx genes, namely the stx 1 , stx 1d , stx 2 , and stx 2e , and the strains exhibited a high range of multiple antimicrobial resistance indices. The resistance genes bla CTX-M-1 and bla TEM were detected. For the oxytetracycline resistance genes, most of strains contained tet A, tet B, tet E, and tet G while the tet C was present at low frequency. MLVA genotyping resolved 26 unique genotypes; genotype 21 was highly prevalent. The six highly discriminatory loci DI = 0.9138 are suitable for the preliminary genotyping of STEC from animals and humans. Conclusions The STEC isolated from animals are virulent, resistant to antimicrobials, and genetically diverse, thus demands greater attention for the potential risk to human.
Type of Medium:
Online Resource
ISSN:
1471-2180
DOI:
10.1186/s12866-021-02308-w
Language:
English
Publisher:
Springer Science and Business Media LLC
Publication Date:
2021
detail.hit.zdb_id:
2041505-9
SSG:
12
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