Re: What systemic parasite are able to not be detected from a blood test?

forget the eosinophil count. You can do the elisa bloodtest for many types of worms or other parasites. Do a google search and you can find more info. When you ask for the test, you need to specify exactly which parasites you mean. I have done it for Ascaris and it was positive, while stool tests and other blood tests were absolutely normal. But i had to ask for it.