[Analysis of reasons for preventing relapses after operations on the lacrimal ducts].

Wrong decision on timely elimination of an abnormality at the level of the lacrimal ducts, irrational surgical treatment policy, and postoperative management in patients with abnormal parameters of the lacrimal system lead to recurrent epiphora. The polymorphism of the causes underlying the development of an unstable lacrimal film requires that individual rehabilitative treatment policy should be chosen for victims.

[Immunologic disorders in pathogenesis of chronic generalized parodontitis].

Systemic immunity was studied in patients with chronic generalized parodontitis. This group of patients had distinct changes in immunologic system: depression of T- and stimulation of B-cellular immunity without accumulation of plasma cells and initiation of effective humoral response. Increased peripheral blood number of lymphocytes expressing induction of apoptosis CD95 receptors and ligand for this receptor CD95L (Fas-L) can lead to intensification of lymphocyte apoptosis and may be the reason for T-cell deficit development.

[Molecular nature of the Brucella polysaccharide antigen (poly-B)].

Cyclic (1----2)-beta-D-glucan was isolated from killed cells of pathogenic Brucella melitensis 16M. Its structure was deduced mainly from the acid hydrolysis, methylation analysis and 13C-NMR spectroscopy data. The cycloglucan and demicellated lipopolysaccharide of B.