Listeriosis in the setting of malignant disease. Changing issues in an unusual infection

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Abstract
Thirteen cases of Listeria monocytogenes infection occurred at the Johns Hopkins Oncology Center over a 10-year period, representing 0.09% of all admissions. These cases principally occurred in patients with underlying hematologic of lymphoreticular malignancy, but in all patients other causes of immune suppression were also present. Corticosteroids were the most frequent exogenous cause of immune suppression. Bacteremia was detected more frequently than meningitis and in contrast to earlier reports, bacteriologic cure was achieved in 12 of 13 patients. Therapeutic success appeared to be related to early institution of effective antimicrobial agents. Despite eradication of infection, seven of the patients were dead within three months from progression of their underlying disease. The overall survival rate of cancer patients with listeriosis is therefore a function of the underlying malignancy and not the infection.

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