A boy gets infected by worms that cause him to sleep excessively; parasites transfer to a man from a swarm of Sandflies; and a man is infected by Botfly maggots following a trip to Belize.
Decaying worms are found in a dance instructor's colon; a parasite ravages a teacher's body from the inside out; and a brain-eating parasite enters a nine-year-old's body.
A boy's teeth begin to move around his mouth following a swim in a lake; an infection eats a man's face; and a child's leg swells after being struck by a deadly parasite.
A case of the flu turns out to be something far more serious; a boy suffers intestinal damage after swallowing magnetic beads; and a student suffers from an infection in his eye.
The documentary series about some of nature's deadliest parasites continues as we meet a Massachusetts man who falls victim to a parasite and a woman feels a stabbing pain in her eye.
An insidious creature takes up residence in a man's spleen, an infection rips a man's leg apart and a mysterious outbreak leads to a four-year-old boy drowning in his own mucus.
In series seven, a woman's dramatic weight gain confounds experts, a mother of two is plagued with a mysterious infection and a man breaks out in a mysterious and worrying rash.