Giardiasis is a stomach bug caused by a tiny parasite.
Giardiasis is often caught from water that's not been treated to kill germs. Most people get it while travelling in developing countries.
Symptoms of giardiasis include smelly diarrhoea, burps that smell like eggs, tummy pain and bloating
Giardiasis is treated with antibiotics. Stay off school or work until your symptoms have stopped for 2 days to avoid spreading the infection.