Fig. 2. SEM of bacterial biofilms grown in the CBD.

For the sake of comparison, the biofilms were grown in either rich or minimal medium (as summarized in Table 1) and then fixed using 1 of 2 different protocols. These micrographs were chosen to illustrate that medium composition has an impact on the capacity of bacteria to form biofilms, which further varies between genus, species and strains. Moreover, the choice of fixing protocols influences how well microstructures may be preserved, which may impact on the interpretation of SEM data.