E. Bleed mixed with vomit or stool.

呕吐物含血或大便带血。

youdao

Norovirus spreads easily via contaminated food or drinking water, but a more insidious route is from a person touching a surface contaminated with the residue of stool or vomit from an infected person and then touching his or her mouth before hand-washing.

FORBES: Magazine Article

To avoid constipation, your doctor might recommend a fiber-rich diet or use of stool softeners.

CNN: Overactive bladder

Confusing the picture further are private labs that offer tests of stool or saliva that they say can definitively diagnose gluten sensitivity.

WSJ: New Guide to Who Really Shouldn't Eat Gluten