anatomicdeadspace:

Human Parasites: Round Worms

These are the largest of the intestinal nematodes affecting humans, growing to 15-35 centimetres in length.  They are transferred by ingestion. The eggs hatch and quickly penetrate the intestinal wall, where they enter the bloodstream  From there, the roundworm makes its way to the lungs, from where it is coughed up and swallowed, returning it to the gut.

Symptoms: fever, tiredness, allergic rash, vomiting, diarrhoea, nerve problems, wheezing / coughing