title: [Survival of ascaris eggs, salmonella and fecal coli in soil and on vegetables grown in infected soil (author's transl)].
abstract: In an experiment it was shown that eggs of Ascaris suum, salmonella and fecal coliform bacteria mixed with sewage sludge and added to soil, will survive the first growing season. Most eggs of Ascaris suum in soil embryonated within a period of 7--15 weeks. In soil without a protective vegetation the concentration of eggs in the top soil layer 0--3 cm decreased faster than in soil with a protective vegetation. At the same time there seemed to be a corresponding increase in the concentration of eggs in the deeper layers of the soil. In the top layer, especially in the top soil without a protective vegetation, there was towards the end of the first growing season a higher per cent of dead eggs than in the deeper layers. The concentration of fecal coliform bacteria and salmonella was in the course of the first growing season reduced to 1/1000 and 1/10000, respectively, of the initial concentration. Infective Ascaris suum eggs and salmonella were found in washing water from vegetables grown in the first season. Infective Ascaris suum eggs were also present in soil in the second and third growing season.
mesh_terms: D001200:Ascaris / Q000302:isolation & purification; D004926:Escherichia coli / Q000302:isolation & purification; D005243:Feces / Q000382:microbiology; D005308:Fertilizers / Q000032:analysis; D005516:Food Microbiology; D010270:Parasite Egg Count; D012475:Salmonella / Q000302:isolation & purification; D012722:Sewage / Q000032:analysis; D012988:Soil Microbiology; D014675:Vegetables
chemical_list: D005308:Fertilizers; D012722:Sewage
vernacular_title: Overleving av spolormegg, salmonellabakterier og termostabile koliforme bakterier i jord og på grønnsaker dyrket i infisert jord.