While medical science has come far, we’re still a long way from eradicating all diseases that could possibly befall an innocent victim. Then again, diseases aren’t actually all that terrifying…that is, if you’re comparing them to the possible impact and severity of contracting a parasite.

Just to stoke your fears a little more, here’s a list of the six most common (and horrible) parasites that can still infect you and ruin your life in 2016.

1. Roundworms

 

Roundworms

 

These horrible little buggers can make the jump to humans via mosquito bite. Once they’re in your system, they can live for up to eight years and wreak havoc on your lymphatic system. The result is typically severe disfigurement involving limbs swelling like the picture above.