Abstract
Pseudomonas aeruginosa, an opportunistic human pathogen,
causes many biofilm-mediated chronic infections. In this study,
biofilm structures of various clinical strains of P. aeruginosa
isolated from hospitalized patients were examined and their
influence on the biofilm-dispersing effects of chemicals was
investigated. The clinical isolates formed structurally distinct
biofilms that could be classified into three different groups:
1) mushroom-like, 2) thin flat, and 3) thick flat structures.
A dispersion of these differently structured biofilms was induced
using two biofilm-dispersing agents, anthranilate and
sodium nitroprusside (SNP). Although both SNP and anthranilate
could disperse all types of biofilms, the thick flat biofilms
were dispersed less efficiently than the biofilms of other
structures. This suggests that biofilm-dispersing agents have
higher potency on the biofilms of porous structures than on
densely packed biofilms.
Citations
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