Escherichia coli isolates from patients with inflammatory bowel disease: ExPEC virulence- and colicin-determinants are more frequent compared to healthy controls
Jazyk angličtina Země Německo Médium print-electronic
Typ dokumentu časopisecké články
PubMed
29735381
DOI
10.1016/j.ijmm.2018.04.008
PII: S1438-4221(17)30516-7
Knihovny.cz E-zdroje
- Klíčová slova
- Bacteriocin, Crohn’s disease, E. coli, Phylogenetic group, Ulcerative colitis, Virulence,
- MeSH
- bakteriální toxiny genetika MeSH
- bakteriociny metabolismus MeSH
- Crohnova nemoc mikrobiologie MeSH
- Escherichia coli genetika izolace a purifikace metabolismus MeSH
- extraintestinální patogenní Escherichia coli izolace a purifikace patogenita MeSH
- lidé MeSH
- lyasy oxokyselin genetika MeSH
- proteiny fimbrií genetika MeSH
- proteiny z Escherichia coli genetika MeSH
- pulzní gelová elektroforéza MeSH
- střevní mikroflóra fyziologie MeSH
- ulcerózní kolitida mikrobiologie MeSH
- Check Tag
- lidé MeSH
- Publikační typ
- časopisecké články MeSH
- Názvy látek
- aerobactin synthetase MeSH Prohlížeč
- bakteriální toxiny MeSH
- bakteriociny MeSH
- cytotoxic necrotizing factor type 1 MeSH Prohlížeč
- fimbrillin MeSH Prohlížeč
- lyasy oxokyselin MeSH
- proteiny fimbrií MeSH
- proteiny z Escherichia coli MeSH
A set of 178 Escherichia coli isolates taken from patients with inflammatory bowel disease (IBD) was analyzed for bacteriocin production and tested for the prevalence of 30 bacteriocin and 22 virulence factor determinants. Additionally, E. coli phylogenetic groups were also determined. Pulsed-field gel electrophoresis (PFGE) was used for exclusion of clonal character of isolates. Results were compared to data from a previously published analysis of 1283 fecal commensal E. coli isolates. The frequency of bacteriocinogenic isolates (66.9%) was significantly higher in IBD E. coli compared to fecal commensal E. coli isolates (54.2%, p < 0.01). In the group of IBD E. coli isolates, a higher prevalence of determinants for group B colicins (i.e., colicins B, D, Ia, Ib, M, and 5/10) (p < 0.01), including a higher prevalence of the colicin B determinant (p < 0.01) was found. Virulence factor determinants encoding fimbriae (fimA, 91.0%; pap, 27.5%), cytotoxic necrotizing factor (cnf1, 11.2%), aerobactin synthesis (aer, 43.3%), and the locus associated with invasivity (ial, 9.0%) were more prevalent in IBD E. coli (p < 0.05 for all five determinants). E. coli isolates from IBD mucosal biopsies were more frequently bacteriocinogenic (84.6%, p < 0.01) compared to fecal IBD isolates and fecal commensal E. coli. PFGE analysis revealed clusters specific for IBD E. coli isolates (n = 11), for fecal isolates (n = 13), and clusters containing both IBD and fecal isolates (n = 10). ExPEC (Extraintestinal Pathogenic E. coli) virulence and colicin determinants appear to be important characteristics of IBD E. coli isolates, especially the E. coli isolates obtained directly from biopsy samples.
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