[Ecology and epidemiology of tick-borne infections in the Primorsky Krai].

Interrelation of parasitological and epidemiological estimations of potential danger of different territories Primorsky Krai concerning presence of natural foci of tick-borne diseases is discussed. Comparative analysis of long-term dynamics of the tick-borne diseases' sickness rate in comparison with long-term dynamics of the vector ticks' abundance has been carried out.

[Nosogeographical estimation of the territory of Primorsky Krai based on the analysis of spatial and temporal structure of the incidence of infectious diseases].

Nosogeographic estimation of the territory of Primorsky Krai has been carried out on the base of the long-term data on spatial distribution of the incidence of infectious diseases. Analysis of the complex maps of the zoning allow us to say, that the territory of the region is rather clearly differentiated by the groups of infections.

[Spatial and temporal structure of the infectious diseases incidence in the population of the south of the Russian Far East: system approach].

New conception of the anthropo-parasitic system has been elaborated. Spatial and temporal structure of the infections diseases incidence in the Primorye Territory has been analysed on the base of this conception.

[Modern problems in the study of tick-born encephalitis natural foci].

A new conception of natural focus as anthropo-parasitic system is given by an example of tick-born encephalitis. Problems of natural foci classification and zoning of focal territories, as well as patterns of ecological relations in these systems, are considered. Causes and factors affected expansion of the infection are analyses.

[Possibilities of factor prognosis of the tick born encephalitis in the Primor'e region]. / Vozmozhnosti faktornogo prognozirovaniia zabolevaemosti kleshchevym éntsefalitom v Primorskom krae.

A technique of temporal factor prognosis of the tick born encephalitis infection during in real time has been elaborated and tested. High adequacy of prognosis for certain regions of the Maritime territory with the tick borne encephalitis foci has been achieved. This approach has a methodological and applied importance and may be used in medico-ecological and epidemiological investigations.

[Some aspects and perspectives of factor prognosis for the epidemic manifestation of tick-borne encephalitis based on a multidimensional analysis of temporal rows]. / Nekotorye aspekty i perspektivy faktornogo prognozirovaniia épidemicheskogo proiavleniia ochagov kleshchevogo éntsefalita na osnove mnogomernogo analiza vremennykh riadov.

A method of factor temporal prognosis for the epidemic manifestation of the tick-borne encephalitis foci has been elaborated, based on recognized critical levels of infection. High reliability of possible prognoses and obvious perspectives of the proposed method are noted.

[Some aspects of the resistance of natural foci of zoonosis infections with an example of the tick-borne encephalitis]. / Nekotorye aspekty ustoichivosti prirodnykh ochagov zoonoznykh infektsii na primere kleshchevogo éntsefalita.

Epidermiological material reflecting some spatio-temporal aspects of the natural foci of tick-born encephalitis resistance has been analysed. The investigation carried out can used as a base for elaboration and realisation of factor prognoses concerning natural foci of zoonosis infection.

[Functional organization of natural tick-borne encephalitis foci and prognosis of their epidemic manifestation: analysis of one-dimensional temporal series of infection]. / O funktsional'noi organizatsii prirodnykh ochagov kleshchevogo éntsefalita i prognoze ikh épidemicheskogo proiavleniia: analiz odnomernykh vremennykh riadov zabolevaemosti.

Temporal extrapolation prognosis of tick-borne encephalitis diseases in the Primorye territory and its certain regions is made by means of autoregression models. The results obtained shows good prospects of used methods and models.

[A medico-geographical assessment of the land area of the Maritime Territory relative to tick-borne encephalitis with some remarks on the structural organization of the foci of said infection]. / Mediko-geograficheskaia otsenka territorii Primorskogo kraia otnositel'no kleshchevogo éntsefalita s nekotorymi zamechaniiami o strukturnoi organizatsii ochagov dannoi infektsii.

A division of the Primorskiy Kray into districts in relation to the tick-borne encephalitis was based on three criteria: long-term dynamics of infection, chorological structure of ixodid tick populations and probability of this or that clinical form of infection.

[Methodological aspects in the study of the natural foci of zoonoses]. / Nekotorye metodologicheskie aspekty izucheniia prirodnykh ochagov zoonozov.

Conceptions of different authors on the natural focus of zoonosis infections are analysed and an improved definition of this phenomenon is proposed. The natural focus of disease is the antropoecosystem of certain hierarchic level (biosocial system), where the existence and appearance of the infection agent is supported and the disease is realized in people at certain infection rate.

[An analysis of geographical differences in the appearance of tick-borne encephalitis]. / Analiz geograficheskikh razlichii proiavleniia kleshchevogo éntsefalita.

Reasons of differences in clinical forms of tick-borne encephalitis within certain regions and throughout all area are analysed. It is supposed that the epidemic potential of natural focus depends upon temperature conditions during the winter period.

[The structure and functioning of tick-borne encephalitis foci in the southern Far East]. / Nekotorye aspekty izucheniia struktury i funktsionirovaniia ochagov kleshchevogo éntsefalita iuga Dal'nego Vostoka.

Based on a statistic data on cases of different clinical forms of the tick-born encephalitides in the Russian Far East during 35 years passed it is stated that ecological relations in natural foci of this infection have clear and stable spatio-temporal specific features and hierarchic structure. The epidemic potential of the tick-born encephalitis foci is determined in a great degree by conditions of a cold period of year.

[Correlation of the relative population count of ixodid ticks with various recording methods]. / O sootnoshenii otnositel'noi chislennosti iksodovykh kleshchei pri razlichnykh metodakh ucheta.

Data are given on the relative abundance ratio of 3 species of ixodid ticks obtained by different counting methods.

[Characteristics of the relation of tick-borne encephalitis morbidity to natural factors]. / Ob osobennostiakh sviazi zabolevaemosti kleshchevym éntsefalitom s prirodnymi faktorami.

Data and tendencies characteristic of relationship between the severity of the course of tick-borne encephalitis and a number of biotic and climatic factors have been revealed by the method of information analysis. On the basis of relationships established in this study the authors make a suggestion concerning two most important stages in the formation and manifestation of the clinical features of tick-borne encephalitis in different areas of endemic territories, linked, on one hand, with the population selection of the infective agent and, on the other hand, with temperature conditions and the duration of the cold season.

[Population density of Ixodes persulcatus ticks (Ixodidae) in the western Sikhote-Alin]. / Plotnost' naseleniia pastbishchnykh iksodovykh kleshchei (Ixodidae) v Zapadnom Sikhoté-Aline.

The paper presents data on the population density of active ticks in different landscape zones of West Sykhote-Alyn as well as the material on the absolute abundance of ticks in four experimental 400 m2 areas. The abundance of active Ixodes persulcatus and Haemaphysalis japonica on vegetation at the peak of their activity was found to amount to half of all hibernated adult ticks.

[Distribution and ecology of Ixodes pavlovskyi (Ixodidae) in Sykhote-Alin]. / Rasprostranenie i ekologiia Ixodes Pavlovskyi (Ixodidae) v Sikhote-Aline.

I. pavlovskyi is absent from the eastern macroslope of Sykhote--Alin, rare in the central part of the ridge and is quite common in western Sykhote--Alin where it accounts for no more than 10% of total collections with I. persulcatus. An average density of ticks in forests of western Sykhote--Alin is 50 to 80 active adults per hectare, maximum density - 150 specimens. Larvae feed on various small mammals and birds, nymphs--on birds and mammals larger than Sibirian chipmunk. Adults feed on hedgehogs, hares and birds, preferrence being given to hazel hens.