Number 3 Editorials Transfusion-associated Yersinia enterocolitica Yersinia enterocolitica is an emerging enteric pathogen associated with a wide spectrum of clinical and immunologic manifestations.â There has been a rather dramatic increase in the frequency of isolation of this organism from both clinical and nonclinical specimens over the past two decades. I n several countries (Netherlands, Belgium, Canada, and Australia), Y. enterocolitica has surpassed Skigella and rivals Salnionella and Carnpylobacter as a cause of acute bacterial gastroenteritis. Y. enterocolitica is a facultatively anaerobic, gramnegative coccoid bacillus that is motile at 25Â°C but nonmotile at 37âC.2 Although the organisms multiply most rapidly at higher temperatures (25-37âC), they continue to do so at lower temperatures (e.g., 4Â°C) as well. Hence, their detection can be âenhancedâ by incubating specimens at lower temperature^.^ Colonies of Y. enterocolitica grow slowly (48 hours) on routine enteric media and do not ferment lactose on media containing bile Salk2 Typical strains give positive reactions in Christensenâs urea agar. Strains previously termed âatypical Y. enterocolitica â or âY. enterocolitica-like organismsâ have now been classified as separate species (Y. intermedia, Y. kristensenii, and Y. frederiksenii). Y. enterocolitica can be characterized by biochemical testing (five biotypes), serotyping (39 0 and 19
Transfusion – Wiley
Published: Mar 4, 1990
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