Czech health officials on Tuesday confirmed the country's first case of an E coli epidemic that has been radiating from Germany over the last week, DPA reported.
The American tourist had just arrived in the Central European country after a trip to northern Germany, where she had eaten vegetable salads.
She is being treated at the infectious disease ward of a Prague hospital.
The ongoing outbreak of enterohaemorrhagic Escherichia coli (EHEC) has claimed 16 people across Europe.