Abstract The Fusobacterium genus contains Gram-negative, rod-shaped anaerobic bacteria. necrophorum and its two subspecies, funduliforme, are normal ruminal inhabitants of cattle. Subsp. is the primary causative agent liver abscesses in feedlot varium also a rumen inhabitant, but role fermentation involvement unknown. Currently, no PCR assays exist to quantify F. both subspecies necrophorum. Th...