Grouchy snailitis is a snail disease cause by a splinter. It is only seen in the episode, "Once Bitten."
It is a disease caused by a splinter pricking part of a snail's skin. It can be diagnosed by a S.D.E. or S.E. expert, such as Dr. Gill Gilliam.
HistoryIt is only seen in the episode, "Once Bitten." In the episode, Gary the Snail contracts the disease, causing a rampage of him around town, biting people with a supposed "mad snail disease." It is revealed later in the episode, that Gary only has grouchy snailitis.
It has only been identified in Gary. It was diagnosed by Dr. Gill Gilliam, SDE, SE.