rhubarb disease?

Is there a rhubarb disease where the rhubarb looks like it should, but there's a slime on it that feels like a male body fluid (keeping it g-rated)? This is in my woodchip bed that has a lot of Wine Caps, and this year we have a very high water table (last week it was a little spongy next to the bed, and it's a little higher than that). The plant looks normal on the surface.