Survival of Ascaris ova in desert soils: A risk assessment

David L. Williams, Ian L. Pepper, Charles P. Gerba

Research output: Contribution to journalArticlepeer-review

3 Scopus citations


The goal of this study was to determine effects of temperature and soil type on survival of Ascaris ova in two biosolid-amended, desert soils. Results of this study suggest that a waiting period of 120 days at average soil temperatures of 25°C or 90 days at 37°C after land application of biosolids on fields to which lettuce is planted would result in annual risks of less than 1:10,000 for Ascaris from consumption of lettuce with an ova concentration of 4 ova g dry solids.

Original languageEnglish (US)
Pages (from-to)151-157
Number of pages7
JournalJournal of Residuals Science and Technology
Issue number4
StatePublished - 2012

ASJC Scopus subject areas

  • Environmental Engineering
  • Environmental Chemistry
  • Waste Management and Disposal


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