Symptoms of paragonimiasis may include abdominal pain, diarrhea, fever, and hives. If the infection remains untreated, the symptoms may diminish or disappear after only few months, but sometimes they last for decades. Paragonimiasis is caused by the body's natural immune response to the worms and eggs that are present and also migrating from the intestines to the lungs. As a rule, the parasites begin to cause symptoms about three weeks after ingesting live metacercariae. After about eight weeks, they begin to produce eggs in the lungs. Some patients develop brain damage if parasites establish in the brain and produce eggs. The brain damage commonly causes headache, vomiting, and seizures. Untreated cerebral paragonimaisis commonly results in death from increased intracranial pressure.
Paragonimus
Echinostoma
Anorchia
Trichostrongylus
Mammomonogamus
Trichinella
Anisakis
Fasciola