The CDC's website says no blood test can detect all
parasites -
http://www.cdc.gov/parasites/references_resources/diagnosis.html
"Blood tests
Some, but not all, parasitic infections can be detected by testing your blood. Blood tests look for a specific
parasite infection; there is no blood test that will look for all parasitic infections. There are two general kinds of blood tests that your doctor may order:
Serology
This test is used to look for antibodies or for
parasite antigens produced when the body is infected with a
parasite and the immune system is trying to fight off the invader.
This test is done by your health care provider taking a blood sample and sending it to a lab.
Blood smear
This test is used to look for
parasites that are found in the blood. By looking at a blood smear under a microscope, parasitic diseases such as filariasis, malaria, or babesiosis, can be diagnosed.
This test is done by placing a drop of blood on a microscope slide. The slide is then stained and examined under a microscope."
Also I haven't seen my blood test results yet but wouldn't be surprised what shows either way. Often certain blood levels shift such as elevated liver enzymes, elevated glucose (once showed that), elevated albumin, etc.
Hoping eosinophils show up elevated tho so the id doctor can actually help with this. The evidence speaks for itself tho - gi system messed up, rubbery strings show up in stool - could be damaged intestines but what the hell besides
parasites does that - when I got a colonoscopy a year ago they found nothing, and I've seen flukes a few months come ago come out as well - hard rubber orange things not related to anything eaten, and that's besides other symptoms including weird rashes popping up with anti parasitic food, etc.