CanadainFrog,
Thanks for the info, very interesting. I knew that there were many types, and that some had more "life cycles" than others, but not the other "real world" info you gave me. Thanks for that, I unfortunately don't really have a problem with my animals having some internal worms etc. They have them in the wild, and as long as the harmful ones are not present, it doesn't bother me. I would hope that the basic rule of washing your hands after holding your animals/cleaning their enclosures would eliminate at least the majority of danger. Thanks again for your response, very informative. Keep it up.

Evan