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Background  To screen whether  E. coli  strains encoding type 1 fimbriae, isolated from fecal microflora, produce bacteriocins more often relative to  fimA -negative  E. coli  strains of similar origin.    Methods  PCR assays were used to detect presence of genes encoding 30 bacteriocin determinants (23 colicin- and 7 microcin-encoding genes) and 18 virulence determinants in 579  E. coli  strains of human and animal origin isolated from hospitals and animal facilities in the Czech and Slovak Republic.  E. coli  strains were also classified into phylogroups (A, B1, B2 and D).    Results   fimA -negative  E. coli  strains (defined as those possessing none of the 18 tested virulence determinants) were compared to  fimA -positive  E. coli  strains (possessing  fimA  as the only detected virulence determinant). Strains with identified bacteriocin genes were more commonly found among  fimA -positive  E. coli  strains (35.6 %) compared to  fimA -negative  E. coli  strains (21.9 %,  p  &lt; 0.01) and this was true for both colicin and microcin determinants ( p  = 0.02 and  p  &lt; 0.01, respectively). In addition, an increased number of strains encoding colicin E1 were found among  fimA -positive  E. coli  strains ( p  &lt; 0.01).    Conclusions   fimA -positive  E. coli  strains produced bacteriocins (colicins and microcins) more often compared to  fimA -negative strains of similar origin. Since type 1 fimbriae of  E. coli  have been shown to mediate adhesion to epithelial host cells and help colonize the intestines, bacteriocin synthesis appears to be an additional feature of colonizing  E. coli  strains.    Electronic supplementary material  The online version of this article (doi:10.1186/s12866-015-0530-5) contains supplementary material, which is available to authorized users.

Determinants encoding fimbriae type 1 in fecal Escherichia coli are associated with increased frequency of bacteriocinogeny