There are hundreds of strains of E. coli bacteria, and most of them are harmless. At the worst, they cause a few days of digestive discomfort.

大肠杆菌有数百种菌株，但大多数都是无害的。

youdao

Former reporter Susan Yara took the Biophysical250 test after years of low-level but persistent digestive discomfort that was never accurately diagnosed, despite numerous tests for thyroid disorders and irritable bowel syndrome.

FORBES: An Uneasy Mark

"Be on the lookout for any esophageal symptoms if you take oral bisphosphonates, especially swallowing difficulty and throat, chest, or digestive discomfort, and report them to your physician for prompt evaluation and drug discontinuation, " she says.

CNN: Study: No esophageal cancer risk from bone drugs