[Characteristics of flow standardized inspiratory lung sounds in healthy].

Objectification of respiratory sounds, recorded on chest surface, is important to assess human broncho-pulmonary system. The aim is to detail the objective characteristics of basic inspiratory sounds. The study involved 36 healthy men aged 19 to 80 years. Under flow rate 0.89 ± 0.18 L/s medians of spectral characteristics of basic inspiratory lung sounds are in the ranges: amplitude level -63.3... -56.5 dB, -3 dB cutoff frequency 269.5-359.4 Hz, -20 dB cutoff frequency 531.3-621.1 Hz, the slope of the spectrum curve between the cut-off frequencies -0.077... -0.050 dB/Hz. The high degree of bilateral symmetry of spectral characteristics is found. Significant upward trend in the cutoff frequencies is revealed between interscapular region and apices or basal areas of the lungs. The 90% limits of intersubject variability of the cutoff frequencies of the spectrum are identified in areas of chest used for lung auscultation.

[The Hydrachnidae water mites of southwestern Siberia in relation to their participation in arbovirus circulation]. / Vodianye kleshchi Hydrachnidae iuga Zapadnoi Sibiri v sviazi s ikh uchastiem v tsirkuliatsii arbovirusov.

The phenomenon of Hydrachnidae association with the tick-borne encephalitic viruses complex has been found out during the study of the role of the Hydrachnidae in the arboviruses circulation. We investigated the fauna, studied the quantity variation and trophic relations of these arthropods and blood-sucking Diptera. It was revealed no trophic relations between blood-sucking Diptera and mite species, where TBE strains were isolated from. On the basis of faunistic and virological study we suppose, that Hydroacarinae got an infection with the virus in the nymphal and imago stages, as well as larvae of mosquitos. Authors also note, that trophic relations between blood-sucking Diptera and chiggers (Trombidiidae) may be important in the arboviruses ecology.

[Device for examining the state of bronchial patency using the acoustic method]. / Pribor dlia issledovaniia sostoianiia bronkhial'noi prokhodimosti akusticheskim metodom.

An acoustic device was proposed to detect bronchial obstruction by analysing a noise process in the laryngotracheal region at the forced expiration. Clinical trials were under way, which revealed persistent diagnosis signs of bronchial patency impairments associated with changes in the duration and shape of the envelope of a recorded acoustic signal, as well as deviations of its spectral characteristic.

[The characteristics of the relationships of arthropods of the refuge complex with the causative agents of transmissible viral infections in bird rookeries]. / Osobennosti sviazei chlenistonogikh ubezhishchnogo kompleksa s vozbuditeliami transmissivnykh virusnykh infektsii v kolonial'nykh poseleniiakh ptits.

The isolation of viruses of tick-borne encephalitis, West Nile fever, and Omsk hemorrhagic fever from arthropods of nests of colonial birds (rook, sand martin, tree sparrow, Laridae) in different zones of West Siberia (from tundra to steppe) has been analyzed. The role of gamasid mites, hematophages and saprophages, characteristic inhabitants of nests of colonial birds, and of the tick Ixodes lividus in connection with their biology, coadaptation with hosts, microclimatic nest conditions, etc. has been evaluated. It has been concluded that the whole nest community of arthropods in a nest rather than one infected individual has to be regarded as an infective unit in colonies.