Internal parasites can be found within the gastrointestinal (GI) tract, heart, large blood vessels, and lungs of your pet. These can all be detected with the proper testing. While some may be visible with the naked eye, others are microscopic. Even more worrisome, some parasites are ZOONOTIC, which means humans can become infected.
Common internal parasites that are found in the GI tract include:
The internal parasite that is found in the heart, large blood vessels, and lungs is:
Example of what Giardia looks like under the microscope.