RPG Menagerie: Son of Kyuss

In between Monster Manuals I and II, TSR published the Fiend Folio, which wasn't written by Gygax, but rather by British contributors to the regular Fiend Factory column in White Dwarf magazine! I didn't know it at the time, but it does explain the utter WEIRDNESS of many of the entries. Over time, a lot of the creatures WERE properly integrated into TSR's worlds (the Githyanki on the cover, for example, would become important in the Planescape setting). But when I think of the Fiend Folio, the one monster I think about is the following...

Monster: Son of Kyuss, later called Spawn of Kyuss
Game/Product: AD&D/Fiend Folio

Writing: Michael MacDonald. Art: Emmanuel (I think)
Origin: An attempt at a different kind of undead, the Son of Kyuss is essentially a corpse animated by flesh-eating worms, its soul trapped inside and driven insane by the experience. Gross and creepy! The first were created by Kyuss, a high priest of Orcus, and then increasing their numbers through contagion.
Fear Level: High. A 30' zone of fear surrounds each Son of Kyuss, but even if one didn't, the body horror on these is very real. This one's for GMs with a talent for unsettling description. The name has since been changed to Spawn of Kyuss, so they don't have to be male anymore.
Danger Level: High. They're not much more powerful than zombies on the surface (give or take its regeneration powers), but holy crap! Each successful hit has 25% of giving you a magical kind of leprosy that's fatal within 1-6 months. Worms are flying around during a fight and quickly burrow into opponents' flesh, reaching the brain within only a few rounds and suddenly turning your PC into a putrefying Son of Kyuss. That's an insane level of danger, on many fronts.
Famous examples: Orcus has some at his command in the infamous Throne of Bloodstone adventure. 2nd Edition reintroduced them in the World of Greyhawk Monstrous Compendium. There was an early 90s American "stoner rock" group called Sons of Kyuss (later just Kyuss).
I wonder if: Anyone reading this has ever lost a character to the Kyuss Kurse? Reading the original specs, at least, it feels like the one reasonable reaction to encountering this type of undead is to run away. But that's if you're REALLY GOOD at differentiating undead. PCs might at first think they're zombies or mummies, until they see the wormy whites of the eye orbits.