My GI told me that when a biopsy comes back normal it doesnt necessarily mean you dont have IBD. Because when they take swabs it depends what they looked for. He told me during colonoscopy that i had nonspecific proctitis which is UC in the rectum (in plain terms).
The biopsy swabs are taken to rule out other causes of the inflammation (campylobacter, shigella etc) and confirm that the GI's first instincts are correct.
The biopsy swabs are taken to rule out other causes of the inflammation (campylobacter, shigella etc) and confirm that the GI's first instincts are correct.