Isidore of Seville [7th century CE] (Etymologies, Book 12, 5.16): The usia is a vermin of swine, named because it ‘burns’ [urere], for wherever it has bitten, that spot becomes so inflamed that blisters are formed there.- [Barney, Lewis, et. al. translation]

Thomas of Cantimpré [circa 1200-1272 CE] (Liber de natura rerum, Worms 9.51): Uria is a worm of pigs, as Isidore says. It has its name from the fact that where it bites, that place burns so much that blisters rise there. - [Badke translation/paraphrase]

Albertus Magnus [ca. 1200-1280 CE] (De animalibus, Book 26, 46): Uria is a worm that infests pigs. It takes its name from the word burning [urendo} because blisters arise in the places where it bites, as if the locations had been burned. - [Scanlan]