But globally, it is estimated that over 600 million people are infected with the skin-penetrating threadworm, also known as Strongyloides ... begins when immature larvae excreted in the host ...

Narrator: For some bug babies, your body is home sweet home. Human botfly larvae, for example, burrow under your skin, forming a pus-filled pimple. Meanwhile, thousands of young Loa loa worms can ...