[Gastritis associated with Helicobacter pylori in the material of gastrobiopsies in the group of children with dyspepsia].

Helicobacter pylori (HP) was studied in gastrobiopsies from 180 children, 9 to 17 years old with chronic dyspeptic symptoms. The presence of HP was found in the stomach mucosa of 78.9% patients.

ABT492 and levofloxacin: comparison of their pharmacodynamics and their abilities to prevent the selection of resistant Staphylococcus aureus in an in vitro dynamic model.

Objective: To compare the kinetics of killing/regrowth of differentially susceptible clinical isolates of Staphylococcus aureus exposed to ABT492 and levofloxacin and to explore their relative abilities to prevent the selection of resistant mutants.

Methods: Three clinical isolates of S. aureus--including two ciprofloxacin-susceptible S.

[Forecasting of biocenosis quantity in the open system with a finite difference model].

A simple mathematical model for the dynamics of biocenosis in an open system was worked out. The model is based on the finite-difference presentation of experimental data. It also takes into account the past history of population development.

[The use of various models of biosynthesis kinetics].

The available models of the microorganism growth kinetics are analyzed. The possibility of application of the Monod model is studied. It is shown that these models do not permit describing adequately the experimental data at different initial concentrations of biomass and substrate that vary in a wide range.