Parasites in Nightcrawlers

[Little Wise Owl]

I've been wanting to get a bunch of Nightcrawler earthworms but feel a little put off now that I've read they carry many different parasites. I notice many of you feed them and I was wondering where you get them.

"Earthworms have many internal parasites including Protozoa, Platyhelminthes, Nematodes; they can be found in the worms' blood, seminal vesicles, coelom, intestine, or in the cocoons." From the Wikipedia article about Earthworms.