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Zoonoses surveillance : Listeriosis : annual summary 1969
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December 1969
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Description:It was not until 1929 that Listeria monocytogenes was reported to cause disease in man,1 although infections caused by thi^bacterium have been recognized as a significant problem in animals since 1911. Since its recognition, human listeriosis has been considered a rare disease. Within the past decade, it has been reported with increasing frequency until it appears that listeriosis in man is not rare, but rarely recognized.
One hundred-five cases of human listeriosis were reported to the National Communicable Disease Center in 1968, 45 more cases than were reported in 1967. Listeriosis was a contributing factor in the death of at least 24 of the 105 cases. The increase in the number of reported cases is probably due to an increased awareness of the disease by physicians and laboratory personnel, and not to a rise in the incidence of the disease.
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