[Cartographic method in the epidemiological study of infections and infestations. III. The study of patterns of tetanus spread in relation to edaphic factors]. / Kartograficheskii metod pri épidemiologicheskom issledovanii infektsii i invazii. Soobshchenie III. Issledovanie zakonomernostei rasprostraneniia stolbniaka v sviazi s édaficheskimi faktorami.

The conjugate analysis of the address map, the density chart and the map of the density field of tetanus morbidity with the soil map has revealed that this morbidity is linked with the properties of the soil. The map of the density field has proved to be most suitable for such analysis. Morbidity is unevenly distributed over the territory. Its highest level is observed in regions with neutral or almost neutral soils. Regions with soils having acidic or alkaline properties are characterized by low morbidity levels. The dependence of morbidity levels on the proportional distribution of soils with different properties has been determined. These data may be used for the prognosis of morbidity on territories with soils differing in their acidic and alkaline properties.