Annual Summary of Disease Activity:
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Listeriosis, 2007
Six cases of listeriosis were reported during 2007. All case-patients were hospitalized, and two died. The median age of case-patients was 78 years (range, 68 to 95 years). Four had Listeria monocytogenes isolated from blood, one from cerebral spinal fluid, and one from a joint. None of the cases were part of a recognized outbreak. The six cases reported in 2007 is similar to the median annual number of cases reported from 1996 through 2006 (median, 8 cases; range, 4 to 19).
Elderly persons, immunocompromised individuals, pregnant women, and neonates are at highest risk for acquiring listeriosis. Listeriosis generally manifests as meningoencephalitis and/or septicemia in neonates and adults. Pregnant women may experience a mild febrile illness, abortion, premature delivery, or stillbirth. In healthy adults and children, symptoms usually are mild or absent. L. monocytogenes can multiply in refrigerated foods. Persons at highest risk should: 1) avoid soft cheeses (e.g., feta, Brie, Camembert, blue-veined, and Mexican-style cheeses) and unpasteurized milk; 2) thoroughly heat/reheat deli meats, hot dogs, other meats, and leftovers; and 3) wash raw vegetables.
- For up to date information see>> Listeriosis (Listeria)
- Full issue>> Annual Summary of Communicable Diseases Reported to the Minnesota Department of Health, 2007