“…Surgical trauma is often accompanied by a diminished immunocompétence [2,4,8,9,11,16,17,19,20], characteristics of which are lymphopenia and a decreased responsive ness of blood T lymphocytes to polyclonal mitogens [2,9,19]. Skin reaction to recall mitogens may also become attenuated [9], Suppressor cells seem to be partly involved in causing these phenomena (1,6,13,15,23,24].…”