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Updated: Jan 24, 2026

Metagenomic Analysis of Silage
Published on: January 13, 2017
Monitoring Dairy Silage for Five Bacterial Groups with Potential for Human Pathogenesis
Michael A Grant1, Cheryl A Eklund1, Sue C Shields1
1U.S. Food and Drug Administration, Bothell, Washington 98041-3012 USA.
Abstract:
Two types of silage routinely used at a dairy research facility were monitored over a 20 month period for five bacterial groups which have been associated with human pathogenesis. Those monitored were Listeria monocytogenes , Yersinia enterocolitica (motile), motile aeromonads, Campylobacter sp., and enterohemorrhagic Escherichia coli . Of 46 total silage samples, 8.7% were positive for L monocytogenes , 6.5% for Y. enterocolitica , and 10.9% for motile aeromonads. Campylobacter spp. and enterohemorrhagic E. coli were not isolated. The presence of pathogens was associated with elevated pH in silage samples.
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