FIG. 4.

Effect of aeration on the adhesion of anaerobic bacteria. Clean glass surfaces were exposed to suspensions of log-phase S. wolfei (A) or Desulfovibrio sp. strain G11 (B) cells in dilute mineral medium (density, 10⁹ cells/ml) for 3 h under aerobic or anaerobic conditions. Attached cells were fixed with formalin and counted microscopically as described in Materials and Methods. Standard deviations are indicated by error bars.