[Disinfectants and main sanitary and preventive measures for protection of ventilation and air-conditioning systems from Legionella contamination].

The study was devoted to selection and assessment of disinfecting preparations for prevention of contamination by Legionella. Using system of criteria for quality assessment of disinfectants, seven newdomestic ones belonging to quaternary ammonium compounds class or to oxygen-containing preparations and designed for disinfecting of air-conditioning and ventilation systems were selected. Antibacterial and disinfecting activities of working solutions of disinfectants were tested in laboratory on the test-surfaces and test-objects of premises' air-conditioning and ventilation systems contaminated with Legionella.

[Specific features of minute structure of Mycobacteria cultured in murine macrophages].

In experimentally infected murine peritoneal macrophages and murine macrophage-like cells J-774 with different pathogen strains of tuberculos'is, Mycobacterium tuberculosis (MBT) underwent significant morphofunctional changes. In phagocytosis, several live and mycobacteria conventionally referred by the authors to as morphotype I cells come from the environment to the macrophage. Of them, single young and intact mycobacteria are able to multiply and form at 2-3 generations morphotype II microcolonies from 3-9 mycobacteria or more in the phasolysosomes within the first 24 hours after infection.

[Reflection of the magnitude of the arm rotation angle by the time parameters of kinesthetic evoked cortical potentials in rhesus macaques].

The electrophysiological experiments were carried out on five male macaques rhesus under nembutal anesthesia. Kinesthetic evoked potentials in response to arm rotation in the elbow joint were registered in the contralateral primary somatosensory cortex. The data obtained show a significant increase in the duration of kinesthetic potential first positive component with 10 degrees-40 degrees arm rotation amplitude, as compared to 2 degrees rotation.

[Centro-peripheral organization of the kinesthetic system studied by natural stimulation of peripheral receptors].

A method is suggested for investigation of the central peripheral organization of the kinesthetic system by nonartefact natural stimulation of the receptors in animals with the aid of a kinesthetic stimulator. The data obtained show the evoked potentials in response to natural stimulation in the contralateral somatosensory cortex of cats to have a significantly shorter latent periods as compared with electric stimulation. It is concluded that the rate of kinesthetic afferent volleys conduction in the somatosensory pathway is higher than that of mixed information during electric stimulation.