Representative samples from biofilm formed on dishwasher rubber seal.

(a-f) Dehydrated biofilm. (a, b, f) In-vivo morphology (muriform cells embedded in extracellular polymeric substance (EPS)) from a biofilm on a dried rubber dishwasher seal from which E. dermatitidis genotypes A and C were isolated. (c-e) Structures of filamentous fungi after desiccation show Fusarium spp. (c), Aspergillus spp. (d) and spores (e). (g-i) Hydrated biofilm. Co-culture of bacteria and fungi (g), clusters of yeast cells covered with EPS, with additional individual cells that spread during the washing cycle (h), and muriform cells of E. dermatitidis genotype A with fungal hyphae (i).