Engineered yogurt bacteria could make detecting colorectal cancer and other diseases as simple as a pregnancy test. Screening for certain cancers could soon be as simple as a home pregnancy test. Sangeeta Bhatia, a professor at MIT, is working to replace costly and uncomfortable colonoscopies and MRIs with a dollop of yogurt and a urine test-a cheap method that could improve the early diagnosis of colorectal cancer.

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