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Epidemiology of listeriosis in Austria

Epidemiology of listeriosis in Austria

Wiener Klinische Wochenschrift 121(3-4): 113-119

A total of 150 human cases of listeriosis (case definition based on isolation of Listeria monocytogenes from normally sterile material) were reported in Austria between 1997 and 2007. Of these, 14 cases (9.3%) were pregnancy-associated (mother/child illness considered as a single case) with a mean age of 29.3 years (median: 26.5; range 24-36). Among the non-pregnancy-associated cases (n = 136), 75 were male (55.2%) and 61 female (44.9%); patients in this group had a mean age of 64.3 years (median: 66.2; range 1-93). The average incidence of listeriosis in Austria in the period studied was 0.168 cases per 100,000 population. The majority of cases (90.7%) were caused by systemic infection, only 9.3% of cases were local infections. Among non-pregnancy-associated cases the fatality rate was 28.7% (39/136) and among the pregnancy-associated cases 35.7% (5/14: miscarriage x3, stillbirth x1, and one death in a newborn within 15 days of birth). Serotyping results for the 150 isolates revealed serovar (SV) 4b: 54%, SV 1/2a: 31.3%, SV 1/2b: 10%, SV 1/2c: 2.7%, 4d: 1.3% and SV 3a: 0.7%. Predisposing risk factors were determined for 131 of the 150 cases: age > or = 65 years (n = 73), pregnancy (n = 14) and 44 cases of carcinoma, blood malignancies, autoimmune diseases and status post solid organ transplants (7 patients had more than one underlying illness). During the period studied, the incidence of listeriosis doubled, despite a drastic reduction in the frequency of pregnancy-associated cases.

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Accession: 053009832

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PMID: 19280136

DOI: 10.1007/s00508-008-1130-2

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