The aim of this study was to examine the link between Campylobacter jejuni isolates obtained from chicken meat (n = 7) and gastroenteritis patients (n = 744). In total, 751 isolates were subjected to Lior serotyping. All the isolates from chicken meats were serotyped as Lior serotype 76 (LIO76). Among 23 of the identified LIO76 strains, 13 strains (6 from chicken meat and 7 from clinical specimens) were indistinguishable by Penner serotyping, antimicrobial susceptibility testing, and pulsedfield gel electrophoresis. These strains were isolated in 2 different Japanese prefectures in 2004-2005, suggesting that chicken meat is an etiological agent of Campylobacter gastroenteritis and that a diffuse outbreak occurred during this time. Therefore, a continuous surveillance program should be established in Japan in order to prevent Campylobacter gastroenteritis, especially large-scale food-borne outbreaks.
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