Figure 9.

Resistance of viscous material-producing strain 17 against the phagocytic activity of human neutrophils. Strain 17 cells were not internalized by neutrophils though many of these cells were bound to the cell surface of neutrophils (A, arrows). In contrast, viscous material non-producing strain 17-2 cells were internalized and the ingested bacteria appear to be enclosed within cytoplasmic vacuoles (B, asterisks). Bars = 2.8 μm.