Figure 3

Biofilm formation of the wild-type and the two mutants in glucose (a) or maltose-containing medium (b). Biofilm formation by the wild-type was similar in medium containing glucose or maltose. The biofilm-negative transposon mutant E. faecalis produced significantly less biofilm in medium containing 1% glucose but equal amounts to the wild-type when grown in 1% maltose. The deletion mutant produced significantly more biofilm than the wild-type strain in medium containing glucose but significantly less biofilm than the wild-type or the transposon mutant E. faecalis when grown in medium containing 1% maltose.