Figure 7

Backscatter electron micrographs of subgingival dental plaque labelled with immune-gold antibodies (a) and control (no primary antibody) (b). The labelled sample (a) has more contrast within the image compared with the control (b) but it was not possible to discern individual immune-gold particles. (a) ×25,000 magnification; (b) ×20,000 magnification.