ANTIBIOTICS RESISTANCE OF CORYNEBACTERIUM NON DIPHTHERIAE STRAINS

Aim. Study the frequency of occurrence of antibiotics resistant strains of various species of Corynebacterium non diptheriae. Materials and methods. C.pseudodiphtheriticum, C.pseudotuberculosis, C.xerosis, C.amycolatum, C.striatum, C.ulcerans strains isolated from patients with pathologies of respiratory and urogenital tract, as well as individuals taking prophylaxis examination were used. Sensitivity to antibacterial preparations was determined by the serial dilution method. Results. The highest number of Corynebacterium non diptheriae strains displayed resistance to benzylpenicillin (54.8%) and lincomycin (50.7%), and lowest - to cefotaxime, cefazolin (6.8%) and vancomycin (13.7%). The highest number of antibiotics resistant strains were detected among members of C.pseudotuberculosis {100%), C.xerosis (96.0%) and C. pseudodiphtheriticum (81.0%) species. Polyresistant strains were detected most frequently among C.xerosis, C.amycolatum and C.striatum species. Strains of Corynebacterium non diptheriae most frequently displayed resistance to 1 or 2 antibacterial preparations (24.7%), less frequently - to 3 (20.5%), 4 (13.7%), 5 (4.1%) and 6 (1.4%) preparations. Conclusion. The amount of antibiotics resistant strains of Corynebacterium non diptheriae is large (89.0%) and non-similar in various species

Pharmacological activity of composition on the base of dihydroquercertin and lipoic acid

The purpose of this investigation is to the estimate influence of composition dihydroquercertin and lipoic acid on lymphatic flow, capillary filtration and blood viscosity in comparison with effects of individual components. Lymphokinetic activity of dihydroquercertin was detected. Capillary-protective effect, but in less degree lymphokinetic and hemorheologic ones of composition are higher than the effect of its separate components

IMMUNOBIOLOGICAL ACTIVITY OF REGULATORY PEPTIDE FRACTIONS SYNTHESIZED BY NEUTROPHILS, AS TESTED IN A MACROPHAGE MODEL

The article presents experimental data on regulatory effect of neutrophilokine helper fractions on the macrophage (Mph) functional activity in the course of antiplague immunity formation. It has revealed that these fractions content biologically active, low-molecular weight peptides. They stimulate Mph killing activity by increasing phagosome-lysosome fusion, thus boosting transformation of monocytes to Mph, and causing redistribution of macrophage subpopulations in the total cellular pool. The helper effect of neutrophilokine fractions upon functional activity of MPh is more pronounced during secondary immune response

Assembling the Puzzle of Taxifolin Polymorphism

A large amount of the current literature dedicated to solid states of active pharmaceutical ingredients (APIs) pays special attention to polymorphism of flavonoids. Taxifolin (also known as dihydroquercetin) is an example of a typical flavonoid. Some new forms of taxifolin have been reported previously, however it is still unclear whether they represent polymorphic modifications. In this paper, we tried to answer the question about the taxifolin polymorphism. Taxifolin microtubes and taxifolin microspheres were synthesized from raw taxifolin API using several methods of crystal engineering. All forms were described with the help of spectral methods, scanning electron microscopy (SEM), X-ray powder diffraction (XRPD), and thermal analysis (TA). SEM reveals that the morphology of the solid phase is very specific for each sample. Although XRPD patterns of raw taxifolin and microtubes look similar, their TA profiles differ significantly. At the same time, raw taxifolin and microspheres have nearly identical thermograms, while XRPD shows that the former is a crystalline and the latter is an amorphous substance. Only the use of complex analyses allowed us to put the puzzle together and to confirm the polymorphism of taxifolin. This article demonstrates that taxifolin microtubes are a pseudopolymorphic modification of raw taxifolin