Listeria monocytogenes
Widely distributed in the environment
Listeria monocytogenes pathgoenic to humans and animals
Several reported outbreaks following consumption of raw milk
Prevalence of L. monocytogenes in bulk tank milk
1987 4.2% USA
1988 1.3% Canada
1988 5.4% Canada
1990 5.2% South Africa
1992 4.9% Ireland
1992 4.1% USA
1995 5.1% England and Wales
1997 4.6% USA...
1998 2.7% Canada