"All Creatures" Sheep Disease question

Season 3, episode 1, “Plenty to Grouse About”

What is the sheep disease carried by the ticks? The colloquial name and the real world name, please.

It’s very important.

If you refresh my memory with the symptoms, it’ll probably come to me. I’ve read the series billions of times and annoyed my SO when we watched the TV series by correctly diagnosing each case.

I’m quite the 1940s-era armchair veterinarian. :smiley:

Found it at last. It was Louping Ill. Sorry for making such a fuss. Nothing to see here.