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Fate of Selected Bacterial Pathogens and Indicators in Fractionated Poultry Litter During Storage

Department of Biology, Valdosta State University, Valdosta, GA 31698

Oscar C. Pancorbo

Massachusetts Department of Environmental Protection, Sen. William X. Wall Experiment Station, 37 Shattuck St. , Lawrence, MA 01843; Phone: (508) 682-5237; FAX: (508) 688-0352

William C. Merka

Department of Poultry Science, University of Georgia, Athens, GA 30602

Sidney A. Thompson

Agricultural and Biological Engineering Department, University of Georgia, Athens, GA 30602

Miguel L. Cabrera

Department of Agronomy/Institute of Ecology, University of Georgia, Athens, GA 30602

Harold M. Barnhart

Environmental Health Science Program, Department of Food Science and Technology, University of Georgia, Athens, GA 30602

Correspondence: Oscar C. Pancorbo

A study of broiler litter re-utilization potential was conducted with the goal of determining if storage of litter significantly reduced potential pathogens to levels safe for re-utilization. Litter from four broiler houses was separated into a fine fraction for fertilizer use and a coarse fraction for use as a supplement to wood shavings in growing subsequent flocks of birds. Fractions and whole litter were stored in indoor piles for four months with periodic analysis for culturable pathogenic and indicator bacteria. Significant reductions in microbial concentrations occurred in a majority of samples tested during four months of storage (in most cases to below detection limits of approximately 30 CFU/g dry weight). Poultry feed was found to be one possible source of litter contamination.

Key Words: Bacteria • fractionation • indicators • letter • pathogens • poultry • storage

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