Abstract：
AIM:To study the influence of 15 microbial isolates on the prevalence of charge-heterogeneous and charge-homogeneous Enterococcus faecalis strains, all isolated from biliary stents, in mixed-species biofilms. METHODS AND RESULTS:Six Enterococcus faecalis strains were paired with 15 other microbial isolates to form mixed-species biofilms in a microtitre plate assay. Charge-heterogeneous Enterococcus faecalis strains display two subpopulations with different surface charges, expressed as a biomodal zeta potential distribution. It was found that, in general, the prevalence of the charge-heterogeneous, biofilm forming Enterococcus faecalis was reduced in mixed-species biofilms. The prevalence of charge-homogeneous, nonbiofilm-forming Enterococcus faecalis strains was increased only in the presence of Citrobacter freundii BS5126, Stenotrophomonas malthophilia BS937, and Candida lusitaniae BS8256, all of which introduced sizeable charge heterogeneity in the mixed microbial population. CONCLUSIONS:Charge-homogeneous Enterococcus faecalis strains are stimulated to form biofilm only by the presence of another microbial species with a considerably less negative zeta potential, thereby creating a charge-heterogeneous microbial population. SIGNIFICANCE AND IMPACT OF THE STUDY:Enterococcus faecalis is one of the predominant species isolated from mixed-species biofilms in clogged biliary stents. The current study shows how charge-homogeneous Enterococcus faecalis strains form more biofilm in the presence of other microbial species.
journal_name
J Appl Microbioljournal_title
Journal of applied microbiologyauthors
van Merode AE,Pothoven DC,van der Mei HC,Busscher HJ,Krom BPdoi
10.1111/j.1365-2672.2006.03187.xsubject
Has Abstractpub_date
2007-05-01 00:00:00pages
1254-60issue
5eissn
1364-5072issn
1365-2672pii
JAM3187journal_volume
102pub_type
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