EFFECT OF 3-HYDROXYPYRIDINE AND SUCCINIC ACID DERIVATIVES ON BACTERIAL GROWTH IN DISCONTINUOUS CULTURES.

We have studied the effect of domestic derivatives of 3-hydroxypyridine and succinic acid (emoxipine, reamberin, and mexidol) on proliferation of E. coli, S. aureus and E. faecalis in discontinuous cultures (DCs) over a period of 1 or 24 h. It is established that the drugs studied exhibit a biphase effect on the number of bacterial colony-forming units (CFUs) in DCs of E. coli and E.faecalis. This effect is manifested by the initial 1.3 - 3.5-fold decrease in the number of CFUs (after 1-h incubation with drugs) with subsequent return to the control level or 1.8 - 8.8-fold increase over the control level (after 24-h incubation with drugs). In DCs of S. aureus that were incubated with the drugs, we observed 1.1 - 1.95-fold increase in CFU number after I-h incubation and 1.8 - 2.4-fold increase after 24-h incubation. On the whole, the results of our studies demonstrated a positive effect of 3-hydroxypyridine and succinic acid derivatives on bacterial growth in DC. These drugs stimulated increase in CFU number in DCs of test bacterial strains even at concentrations as low as 10⁻⁹ -10⁻⁶. The well-known efficiency of 3-hydroxypyridine and succinic acid derivatives in treatment of infectious pathology appears independent of their direct effect on bacterial growth.