Medical student's apparent celiac disease responded to giardiasis treatment

Reminds me of a reddit thread I saw years ago where someone mentioned they got malaria or something while traveling and it was treated with IIRC Ciprofloxacin which also cured a bunch of other issues they were having.

The thread was full of people mentioning that random rashes or other ailments that they assumed were just normal to their bodies for years were cured when they took Ciprofloxacin for a different infection.

My mother had a cough of five years that everyone thought was just her allergies. Cured by unrelated antibiotics. (Not that they did anything about the underlying allergies, just took out what she thought was a symptom she had to live with.)