Dear reader, the video is a little lower. Parasitic worms, also known as helminths, are a polyphyletic group of large macroparasites; adults can generally be seen with the naked eye. Many are intestinal worms that are soil-transmitted and infect the gastrointestinal tract. Other parasitic worms such as schistosomes reside in blσod vessels.Some parasitic worms, including leeches and monogeneans, are ectoparasites – thus, they are not classified as helminths, which are endoparasites.Parasitic worms live in and feed in living hosts. They receive nourishment and protection while disrupting their hosts’ ability to absorb nutrients. This can cause weakness and disease in the host, and poses a global health and economic problem.
