This study was performed to characterize CTX-M type extended spectrum β-lactamase (ESBL)-producing Enterobacteriaceae carriage in asymptomatic health individuals, which has not been well investigated, in a community of the Okinawa prefecture, Japan. Fecal samples were voluntary collected from asymptomatic healthy individuals who were going to take a routine medical checkup. The collected fecal samples were inoculated on MacConkey agar supplemented with 2 μg/ml of cefotaxime and incubated at 37 °C.
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