[The reactions of periodontitis patients to the administration of bacterial allergens].

Analysis of the clinical picture of periodontitis and the results of allergologic tests with administration of hemolytic streptococcus and staphylococcus allergens indicated the formation in the patients of delayed type bacterial hypersensitivity which was weakly manifest and more characteristic of patients with medium-severe or grave periodontitis. Changes in the peripheral blood were also indicative of total body reaction to the local process in the periodontium; immune defense mechanisms were found strained and exhausted.