Amebic dysentery is endemic throughout the world, affecting 17.6% of the population. In the US, it affects 13.6%. ...No one..really knows the extent of the parasites and the diseases they cause.
Though it is hard to believe, it is conservatively estimated that 25 to 50 million Americans carry trichinae larvae in their muscles and internal organs. ...If the (trichinosis) worms affect the heart, respiratory systems, or the nerves, severe symptoms or even death may result.