Mad Snail Disease



"Dr. Gill Gilliam, S.D.E. and S.E., thought that the Mad Snail Disease doesn't exist, making it as there's no such thing as the MSD and stating it's only an urban legend and a myth while saying that nobody got turned into a zombie, just because of all that mass hysteria and knew that all the supposed symptoms are just common ailments. He was wrong. Patrick Star was right. Mad Snail Disease is totally real. Completely got into a reality, not because of a rabid snail... but because of the ARVN hypnotizing snails, making them genetically modified with rabies and become bioterrorist weapons of this mythological viral disease. Now Bikini Bottom's doomed not only to that horrible infection, but also by a conquest made by the evil ducangers. Now we're ready to eradicate it. and make it a myth once more, and this time, we'll make it history for the very first time."

--Su Ji-Hoon, Twice Bitten

Mad Snail Disease is a mythological disease/virus that was believed that snails could be afflicted with. It appears in the SpongeBob SquarePants episode "Once Bitten" and the books Mistaken Identity and Attack of the Zombies!

In When the Cold Breeze Blows Away, it became a real disease/virus when the Undead Alliance bioengineered the MSD (only as a prototype, but it's not in widespread use), but it was also later used by the South Vietnamese Umbrella Force and the Army of the Republic of Vietnam, only to be brought widespread into World War III for the first time in combat.