Key Facts
Reported incidence of giardiasis in Ireland in 2018 is 5.7 per 100,000, similar to the
reported incidence at EU level
Increase in recent yearsbelieved to be largely due to recent changes in laboratory
practice
The ratio to male to female cases is 1.4:1
More than two thirds of cases were reported to be acquired in Ireland, a change to our
historical understanding of giardiasis as a travel-acquired infection
It is likely there is still under-ascertainment of giardiasis cases in several HSE-areas.
Much remains to be done in Ireland and across Europe to better understand the
epidemiology and determinants of this disease
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