First report of macroscopic biofilm formation caused byCandida albicanson silver hydrogel–coated urinary catheters

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We report macroscopic biofilms on silver hydrogel–coated urinary catheters in 2 patients from 2 different intensive care units. The catheters were removed on observation of a white, jelly layer on the catheters, respectively, 9 and 21 days after insertion. Yeast cells and pseudohyphal structures were observed with microscopy. Both isolates were identified as Candida albicans. To our knowledge, these are the first cases demonstrating the formation of macroscopic biofilm layers on silver nitrate–coated catheters in the literature.

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