memory alpha
Scan of an Orillian lung maggot

Scan of an Orillian lung maggot

The Orillian lung maggot was a limbless parasitic lifeform native to the Delta Quadrant. It could be found in bogs.

In 2373, facing imminent death in a plasma explosion, Neelix told Tosin that he would have no problem dying if it would get rid of an Orillian lung maggot like him. (VOY: "Fair Trade")

In 3195, the Doctor discovered that Caleb Mir had an infestation of Orillian lung maggots in his lower bowel. After healing him, the Doctor admonished Mir to avoid bogs and monitor his bowel movements for the next three days. (SA: "Kids These Days")