Figure 1

Effect of honey on formation as well as on a 42 h-old single biofilms of four Porphyromonas gingivalis strains. Manuka honey and a German local honey were added in two concentrations at the beginning of formation or on an already 42-h old biofilm. Colony forming units were determined each 6 h and 24 h after addition of the honeys (CFU counts within biofilm; *p < 0.05; **p < 0.01 compared to controls at the respective time).