Explained in plain English

What is giardiasis?

Giardiasis is a common stomach bug caused by a tiny parasite called Giardia. It lives in the intestines and can cause unpleasant symptoms like diarrhoea, stomach cramps, and bloating. You usually catch it by consuming contaminated food or water, or through contact with an infected person. The UKHSA's warning highlights the importance of good hygiene, especially when travelling.