Mast cells and basophils in murine lymph nodes stimulated by B-cell mitogen

The total number of mast cells and basophilic granulocytes in lymph nodes activated in vivo by a B-cell mitogen (formaldehyde-fixed S. paratyphi B) remains unchanged in spite of a significant enlargement and cellularity of the lymph nodes. This is in contrast to the previous finding showing that T-cell mitogens reduce the number of granular cells in the lymph nodes.