They travel in the hepatoportal system through the liver, then to the heart, lungs, and the arterial system, which distributes them throughout the body. They are transported to striated muscles, penetrate individual fibers, and cysts are formed around the juveniles. Within cysts, juveniles remain viable for many years, up to 25 years in man and 11 years in pigs. There is agreement that there are four juvenile stages but disagreement in the literature as to whether or not nematode development occurs within the cyst. When viable encysted juveniles are ingested, they are digested from the cysts and pass to the duodenum where they mature.
Humans are essentially a dead end for the parasites.
Symptoms-Pathogenicity Nausea, dysentery, colic due to invasion by adult worms. Many cases are never diagnosed because of the vaugeness of the symptoms. Muscle biopsy can be conducted and involves pressing muscle between glass plates to look for cysts. Xenodiagnosis involves feeding suspected muscle to laboratory rats. Cook all garbage fed to hogs.