Instructions
Have a fecal test performed. You will be required to give a stool sample which will be examined for parasites. Because parasite eggs are often passed irregularly, you may need to submit more than one sample for testing.
Undergo the ̶0;string test.̶1; For this test, you swallow a string that is then pulled back up. Then samples of your stomach contents on the string are tested, according to the University of Maryland.
Have the ̶0;scotch tape̶1; test performed. According to the University of Maryland, the "scotch tape" test identifies pinworms by touching tape to the anus several times, then examining the tape under a microscope for eggs.
Have X-rays taken. Your doctor may use barium to help identify parasites.
Have your blood tested. According to the Mayo Clinic, your doctor may test your blood for antibodies your body may have produced to fight infection (such as for tapeworm).
How to Test for Internal Parasites
According to the University of Maryland, there are two main types of intestinal parasites found in humans: helminths and protozoa. Helminths include tapeworms, pinworms and roundworms. Giardia and cryptosporidium are the most common protozoa in the United States. Humans may contract parasites from contaminated food or water. Some worms may be directly spotted outside the body--perhaps in one̵7;s underwear or in the toilet. But if not, there are several ways your doctor can test for a parasite infection.