Presence of basophils in PHA-reacted skin sites of mice. An electron microscopic study

Subcutaneous injections of the lymphocyte mitogen PHA in mice induced a local reaction which was delayed in time course and characterized histologically by dermal infiltration with blood granulocytes. Basophils were identified in the skin sections by electron microscopy as their granules differ from those of other blood granulocytes and tissue mast cells.