Trichinosis is a particularly unsettling disease in which roundworms make use of the human body to stay alive and then reproduce. Trichinosis occurs mostly in meat-eating animals and it is acquired through the consumption of the roundworm larvae that exist in uncooked or undercooked meat. In trichinosis, the larvae then mature in the human body into adult worms, which then in turn produce larvae that will work their way around regions of the body. Trichinosis can go undetected in mild cases, or develop into something much more serious.