[Spatial structure of the community of bats (Chiroptera: Vespertilionidae) hibernating in artificial caves of Samarskaya Luka].

Specific features of the spatial distribution and localization of bats have been studied during their hibernation in artificial caves of Samarskaya Luka. The proportion of cave area occupied by bats varies from 70 to 93% in large caves (> 60000 m2), decreasing to 50% in medium-sized caves (10000-60000 m2) and to less than 30% in small caves (< 10000 m2). Approximately 9% of bats choose sites near cave openings, up to 25% prefer central parts, but most bats (about 66%) concentrate in the deepest parts of caves. Among wintering species, higher rates of occurrence and shelter occupancy are characteristic of Plecotus auritus. Myotis daubentonii, and M. mystacinus, whereas M. dasycneme and M. brandtii show the highest degree of aggregation. The optimal temperature range for the wintering of all bat species is 2-4 degrees C. Myotis brandtii, Eptesicus nilssonii, and M. daubentonii prefer to hibernate in open spaces of cave ceilings; M. mystacinus. E. serotinus, and Pl. auritus usually occupy the middle and upper parts of walls; while M. dasycneme and M. nattereri occur mainly in hollows on ceilings.

[Species structure and dynamics of bat communities (Chiroptera: Vespertilionidae) hibernating in artificial caves of Samara Luka].

Long-term data on the composition and absolute and relative abundance of eight bat species hibernating in artificial caves of Samara Luka are considered. About 13,000 hibernating individuals are annually accounted there. The relative abundance of the species decreased in the following order: Myotis brandtii (35%), Plecotus auritus (20%), M. daubentonii (13%), M. mystacinus (13%), Eptesicus nilssonii (8%), M. dasycneme (8%), and M. nattereri (2%). Singular E. serotinus were recorded not every year. The number of hibernating animals in pits was proportional to their size and the number of shelters. Bats used previously chosen shelters and were never found in adjacent caves. The maximum species diversity (H') and evenness (E) were observed in bat communities in medium-sized caves. One of the main factors of increasing abundance of hibernating bats in abandoned pits is their gradual colonization by the animals.

[Clostridium perfringens in the oral saliva in galvanism]. / Klostridii perfringens v sliune polosti rta pri gal'vanoze.

Clostridia perfringens are much more frequently isolated from galvanism patients than other microorganisms. This fact should be not omitted by physicians, for these bacteria may induce a specific infectious process.

[Study of the mechanisms of autoallergic reactions in cirrhosis of the liver]. / Izuchenie mekhanizmov autoallergicheskikh reaktsii pri tsirroze pecheni

Cell and humoral immunological tests were used in clinical examination of 47 patients suffering from cirrhosis of the liver; a mixed character of autoallergy was revealed in this form of pathology. Reproduction of passive anaphylaxis on guinea pigs with the aid of the sera and leukocytes of these patients pointed to the prevalence of cell allergy. Passive transmission of increased sensitivity to human hepatocytes from guinea pigs, preliminarily sensitized with salt extracts from human hepatocytes, to intact animals was realized. Active sensitization was accompanied by the formation of mixed allergy to the antigen obtained from the liver of a person who died accidentally, with the prevalence of the immediate type of reaction.