[Characterization of contacts of the population of Guinea with synanthropic rodents as Lassa fever virus carriers].

Questionnaire surveys made in 17 villages from 3 ecological zones of Guinea have provided evidence for the population's contact with synanthropic rodents as Lassa fever virus carriers. Over 100 rodents are quarterly captured in the houses of the traditional type in the villages located in the savanna woodland. Less than 10 specimens are captured at the food warehouses.

[An analysis of isometric reflections in morphology exemplified by the mandible of the rat (Rattus, Rodentia)].

Individual, age, sex, and species differences of morphological shape is treated as a result of general shape formation process. It is assumed that mutual reflections of these differences could be described by continuous and discontinuous transformations. The first type of these reflects equilibrium properties of shape formation, while the second type reflects its non-equilibrium properties.

[A small-mammal study in the northeastern Kara Kum for leptospirosis infectivity].

Search for natural foci of leptospirosis was carried out in 1987-1989 in humid biotopes of Tashauz Province, Turkmenistan. Such potential carriers of leptospirosis as house mice (Mus musculus) and tamarisk gerbils (Meriones tamariscinus) are widely spread in this area, and the size of their population can amount to great numbers. The sharpest fluctuations in the population size are characteristic of house mice inhabiting the shores of water collecting ponds and lakes in the regions of minimally used pastures.

[Population contacts in the Republic of Guinea with ectoparasites and rodents based on questionnaire data. 1. The tasks and the scope of the questionnaire].

Questionnaire is presented which was used in 1987 in 15 regions (28,400 inhabitants) of 3 landscape climatic areas in Guinea: savanna-forest, light and damp tropical forests. The questionnaire was aimed at obtaining quantitative characteristics on important items of population economic activity and number of potential hosts and carriers of natural focus infections in the buildings. Types of the population occupation were differentiated in conformity with various biotopes the people belong to, and according to their direct contacts with domestic, synanthropic and wild animals.