Do intestinal worms such as taenia/tapeworm, etc. invalidate ablution?
All kinds of blood, inflammation, and discharge coming out of body, and everything coming out of front and back private parts invalidate ablution. Likewise, taenia/tapeworm and similar worms coming out of anus (the back private part) invalidate ablution, too. Because they come out of a najis (ritually impure) place (Marghinani, al-Hidayah, I, 117).
Source: Presidency Of Religious Affairs The Turkey, High Board of Religious Affairs FATWAS
Does Ear Discharge Invalidate Ablution?
