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United States Department of Agriculture

Agricultural Research Service

2007 Annual Report

1a.Objectives (from AD-416)
Develop fundamental knowledge concerning the microbial populations of swine manure and the swine intestinal tract. Apply this knowledge to understand the relationship between microbial populations and the production of odorous compounds. Develop improved methods to quantitate changes in bacterial populations in feces and stored manure and correlate these with emissions/odorous compounds produced.

1b.Approach (from AD-416)
Determine the identity, relative concentration, and metabolic activities of microorganisms present in stored manure. Carry out physiological, biochemical, and genetic characterization of isolated bacterial cultures; determining which organisms and processes are responsible for production of odor causing chemicals. An extension of this work will be to examine the intestinal flora of the pig and its potential impact on the properties of the manure and the concentrations of potential odor precursors. This research will be conducted using samples from representative swine farms. Evaluate potential compounds for control of specific microorganisms or the metabolic processes responsible for odors.

IDENTIFICATION OF NEW BACTERIAL SPECIES FROM SWINE MANURE. Identifying the bacteria present in swine feces and stored manure is crucial for understanding and interpreting the effects of management practices on these organisms and their impact on production of odorous emissions. Collaborative research was carried out at the National Center for Agricultural Utilization Research, Peoria, IL, and the University of Oklahoma to identify and characterize new, previously unknown bacteria associated with swine manure. This research resulted in the discovery and description of a new bacterial species, Vagococcus elongatus. The information gained from this and similar studies will be useful in establishing the role of these and other organisms in the anaerobic production of volatile emissions in stored manure. This research addresses the Problem Area 1 of the Atmospheric Emissions Research Component of National Program 206, which involves understanding the biological, chemical, and physical processes controlling the emission of gases, odors, and particulates during animal production, manure storage, and manure application.

5.Significant Activities that Support Special Target Populations

6.Technology Transfer

Number of new CRADAs and MTAs1
Number of patent applications filed1
Number of non-peer reviewed presentations and proceedings1

Review Publications
Lawson, P.A., Falsen, E., Cotta, M.A., Whitehead, T.R. 2007. Vagococcus elongatus sp. nov., isolated from a swine-manure storage pit. International Journal of Systematic and Evolutionary Microbiology. 57:751-754.

Last Modified: 5/28/2015
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