Occurrence of geohelminths in the soil of children's playgrounds and green areas in the city of Wrocław, Poland.

Pets, strays, and wild animals that excrete dispersal forms of parasites into the soil may be a threat in urban areas. The aim of the study was to determine the level of contamination with geohelminth eggs in community playgrounds (fenced and unfenced), playgrounds in city parks, and a transect found along the banks of the River Oder. In 74 out of 424 examined soil samples, the presence of geohelminths was confirmed (Toxocara spp., Ancylostomatidae and Trichuris spp.). The highest prevalence was noted for Toxocara spp. roundworms. Both total and mean number of eggs in the examined samples, as well as the general prevalence, proved to be diversified in almost all types of development that were compared. Areas near the river emerged as places most exposed to the appearance of geohelminth eggs; playgrounds in city parks were less likely sites; community playgrounds in the city centre were the least common places.