Worms: aliens in human bodies

In the Philippines, there are three worms that cause the most health problems: roundworms (Ascaris lumbricoides), whipworms (Trichuris trichiura) and hookworms (Necator americanus and Ancylostoma duodenale). These three have been a burden to humanity for centuries. They are called soil-transmitted helminthiasis and are found in the soil. Helminths. Helminths are really parasitic worms (like aliens) […]