Clinical features and possible sources of sporadic Yersinia enterocolitica infections in Finland
Abstract number: P1640
Huovinen E., Sihvonen L.M., Haukka K., Siitonen A., Kuusi M.
Objectives:Yersinia enterocolitica is an important cause of gastroenteritis in Finland causing around 500 infections yearly. Y. enterocolitica species is divided into several bio- and serotypes. The ability to cause gastrointestinal symptoms differ between the bioserotypes as well as the possible sources of infection. We conducted a case-control study to characterize the clinical features and to identify sources of Y. enterocolitica bioserotypes.
Methods: All Yersinia strains isolated in 10 clinical microbiology laboratories in 2006 were collected. Patients with culture confirmed Y. enterocolitica infection were enrolled to questionnaire study. Controls matched on age-, gender- and geography were randomly selected from population registry. Questionnaire included questions related to Yersinia infection, consumption of different food items, traveling etc.
Results: A total of 294 cases were accepted to case control study. Most patients had biotype (BT) 1A (N=187) finding, bio-/serotypes 34/O:3 or 2/O:9 were detected in 61patients. Patients with other serotypes were excluded from further analyses. Patients with 34/O:3 or 2/O:9 findings were younger than those with BT 1A findings (P < 0.001 for difference in means) and small children under three years were overrepresented among those with serotypes O:3 or O:9 (10/61=16%). Many patients with biotype 1A were unable to define any special symptomatic period. Diarrhoea and abdominal cramps were most common symptoms, fever was more common among patients with serotypes O:3 or O:9 and vomiting among subjects with biotype 1A. Significant associations in preliminary analyses were found between both 1A and O:3 or O:9 types and travelling abroad. Serotypes O:3 or O:9 were associated to eating or tasting medium or raw pork. Those who always washed vegetables had decreased risk of Y. enterocolitica infection.
Conclusion: Clinical feature of Y. enterocolitica infections differ between bio-serotypes significantly. Substantial proportion of Y. enterocolitica infections in Finland is associated with traveling. Pork is a significant source of serotype O:3 or O:9 Y. enterocolitica, but it doesn't explain all infections.
|Session name:||18th European Congress of Clinical Microbiology and Infectious Diseases|
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