this was confirmed by the isolation of L. monocytogenes of
the same serotype and bacteriophage type from the implicated
cheese [14]. The contamination was most likely caused by inadequate
pasteurization of milk or by the mixing of raw milk
with pasteurized milk for cheese making. A large outbreak in
Switzerland, a 2000 outbreak in North Carolina, a 2002 outbreak
in Canada, and a 2003 outbreak in Texas again highlight
the risks posed by the use of raw milk in the manufacture of soft,
unripened cheese. These outbreaks have caused public health
officials to recommend that raw milk and dairy products prepared
from raw milk should not be consumed by susceptible
populations, particularly pregnant women