22 conditionally healthy donors, 91 patients with odontogenic abscesses and particularly, with phlegmons as well as 12 patients with mediastenitis were examinated. It was determined that in patients with abscesses and particularly with phlegmons there was the double increase of the level СD3+/НLА-DR+ against a background of T-lymphopenia. At the same time the number of these receptors approaches the level of healthy donors in patients with mediastenitis. The number of natural killers in patients with abscesses 2 times exceeds the normal indices, in cases of phlegmons — 1.5 times less than the norm, in cases of mediastenitis — 3 times lower the level of healthy donors. In cases of unfavorable course of the process the index goes down below 1.
