De or het urinevergiftiging?

The correct Dutch article is:

de urinevergiftiging

Rule Words ending in -ing: almost always de. See the rule

How to use urinevergiftiging

the urinevergiftigingde urinevergiftiging
this urinevergiftigingdeze urinevergiftiging
that urinevergiftigingdie urinevergiftiging
our urinevergiftigingonze urinevergiftiging
your urinevergiftigingjouw urinevergiftiging
every urinevergiftigingelke urinevergiftiging
which urinevergiftiging?welke urinevergiftiging?
a big urinevergiftiging / the big urinevergiftigingeen grote urinevergiftiging, de grote urinevergiftiging