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cheese-related listeriosis outbreak, portugal, march 2009 to february portugal, listeriosis has been notifiable since april 2014, but there is no active surveillance programme for the disease. a retrospective study involving 25 national hospitals led to the detection of an outbreak that occurred between march 2009 and february 2012. the amount of time between the start of the outbreak and its detection was 16 months. of the 30 cases of listeriosis reported, 27 were in the lisbon and vale do tejo region. two cases were maternal/neonatal infections and one result ...201525955775
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