established L. monocytogenes as a high-priority pathogen for
foodborne disease. Like the Canadian outbreak, this outbreak
included a large proportion of perinatal infections, most of
which were in Hispanic women. Caseecontrol studies established
that the outbreak was associated with the consumption
of a specific brand of soft, unripened Mexican-style cheese;
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
established L. monocytogenes as a high-priority pathogen forfoodborne disease. Like the Canadian outbreak, this outbreakincluded a large proportion of perinatal infections, most ofwhich were in Hispanic women. Caseecontrol studies establishedthat the outbreak was associated with the consumptionof a specific brand of soft, unripened Mexican-style cheese;this was confirmed by the isolation of L. monocytogenes ofthe same serotype and bacteriophage type from the implicatedcheese [14]. The contamination was most likely caused by inadequatepasteurization of milk or by the mixing of raw milkwith pasteurized milk for cheese making. A large outbreak inSwitzerland, a 2000 outbreak in North Carolina, a 2002 outbreakin Canada, and a 2003 outbreak in Texas again highlightthe risks posed by the use of raw milk in the manufacture of soft,unripened cheese. These outbreaks have caused public healthofficials to recommend that raw milk and dairy products preparedfrom raw milk should not be consumed by susceptiblepopulations, particularly pregnant women
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