Nope--parasites that kill their hosts off are bad news, and are very rare. Parasites kill off fish in our tanks because they can become so concentrated. With internal parasites they often don't reproduce, so it end up being a low level infection--enough to prevent the fish from thriving, not enough to be lethal.
There are sources of live foods online...
The Bug Farm, your source for live food cultures and supplies. it one I've heard lots of good things about.