[The effect of different factors on the epidemic process in ascariasis (exemplified by Tula Province)].

An epidemiological process in ascariasis in Tula Province within a 16-year period during which there were no significant socioeconomic changes is analyzed. Improved water consumption, the scope and level of waste-water disposal and sewage treatment along with intensive efforts to detect the foci of ascariasis and with the implementation of health-promoting measures in them are shown to have the most considerable influence on the reduction in the intensity of an epidemiological process in ascariasis. These findings may be useful in gaining some insight into the efficiency of health-promoting measures in the foci where sewage treatment is inadequate and water supply is poor.