The closest case we have to a link--again, it's not definitive--is with ISA and wild Atlantic salmon from the Magaguadavic River back in 1999. As Bill mentioned earlier, we've been monitoring this river since 1992. We don't typically take a wild fish out and do disease screening unless it comes up to our trap and is found dead or very injured in the trap.
In 1999, we had some cases of wild fish dying in the trap, and one of those fish tested positive for infectious salmon anemia, which decimated the New Brunswick industry in the mid 1990s. At the same time there were some aquaculture escapees in the trap that tested positive for ISA as well. ISA is very similar to a flu and is very contagious, so if fish come in contact with each other they can contract the disease. That's our closest relation, and we couldn't definitively say that particular fish caught it from the aquaculture escapee.