Dodgy CL results-- Advice?

[Nanno]

I don't know for a fact that my neighbor's herd has CL (haven't personally seen abscesses), but I would be shocked if it wasn't in their herd. They're range goats, so it's hard to get up close enough for personal inspections. I know my neighbors buy a lot of cheap dairy culls and sale barn animals of unknown origin. They always have 300-500 goats at any given time. They did buy their current herd two years ago as one big group and the person they bought them from said it was a "closed herd" with no diseases. However, the goat herd they had before that was not so reputable, and since CL lives in the soil for a year or more, and given their living conditions, I'm sure the new herd has by now even if they were clean when they arrived.

When not out on their daily grazing rounds, the goats are kept in a small pasture which was eaten down to bare dirt years ago. When the neighbor's dog rounded up my goats and put them with his herd, my goats ended up going into that filthy place and came back up to their knees in cesspool muck. Of course, I washed all of them down with bleach water the moment I got them home, but that's the best I could do.

I know Lilly isn't shedding CL (and even if she continually tests positive she may never--who knows), but I do wonder if I'm going to end up eventually getting full-blown infectious cases because of what lives next door. This test result has really made me think about this issue for the first time and I have to admit it has me a bit concerned.