Crossword Clue:

Cause of a gut feeling?

Answer	Crossword Clue
ULCER	Cause of a gut feeling?
ULCER	Cause of a nasty gut feeling?
ECOLI	Cause of a bad gut reaction?

GISERIES	Exam that might cause a gut reaction?
ILEUM	Source of a gut feeling?
ECOLI	Source of a gut reaction?
DOCTORDOLITTLE	Graduate of a "gut" PhD program?
SOT	One with a gut full of rotgut
SNELL	Short piece of gut holding a fishhook.