Figure 2.

Altered phenotype is dependent on bacterial dose. Bone marrow cells were cultured in granulocyte–macrophage colony-stimulating factor at a starting ratio of 1 : 100, 1 : 10, 1 : 1 or 10 : 1 bacteria colony-forming units/ml : cell for the entire 7-day culture period. Surface marker expression was determined by flow cytometry. Control cells were not exposed to bacteria. Mean values ± SEM are expressed of n = 4 independent experiments *P ≤ 0·05, **P ≤ 0·01, ***P ≤ 0·001.