About Us | Help Videos | Contact Us | Subscriptions



This article in JEQ

  1. Vol. 34 No. 1, p. 42-48
    Received: Mar 31, 2004

    * Corresponding author(s): gerba@ag.arizona.edu
Request Permissions


Sources of Pathogenic Microorganisms and Their Fate during Land Application of Wastes

  1. Charles P. Gerba *a and
  2. James E. Smithb
  1. a Department of Soil, Water and Environmental Science, University of Arizona, Tucson, AZ 85721
    b Office of Research and Development, USEPA, Cincinnati, OH 45268


The hazards associated with pathogens in land-applied animal and human wastes have long been recognized. Management of these risks requires an understanding of sources, concentrations, and removal by processes that may be used to treat the wastes; survival in the environment; and exposure to sensitive populations. The major sources are animal feeding operations, municipal wastewater treatment plant effluents, biosolids, and on-site treatment systems. More than 150 known enteric pathogens may be present in the untreated wastes, and one new enteric pathogen has been discovered every year over the past decade. There has been increasing demand that risks associated with the land treatment and application be better defined. For risks to be quantified, more data are needed on the concentrations of pathogens in wastes, the effectiveness of treatment processes, standardization of detection methodology, and better quantification of exposure.

  Please view the pdf by using the Full Text (PDF) link under 'View' to the left.

Copyright © 2005. American Society of Agronomy, Crop Science Society of America, Soil Science SocietyASA, CSSA, SSSA