Trematode
cwilcox | June 7, 2009Yeah, those caterpillar mimicking trematodes were impressive. But we humans have our own trematodes which are pretty nasty, too. One group of trematodes which uses humans as a final host is the genus Schistosoma, like Schistosoma masonii on the right.
Like other trematodes, Schistosoma spp. have very complex live cycles involving multiple hosts. Here's a quick overview image:So: the schistosome's life cycle. They start out as little eggs which leave the adult's host (humans) through the waste systems in urine or feces. These eggs then hatch into the first larval stage, which is called a…
cwilcox | May 28, 2009Ah, the parasitic flatworms called trematodes. There's a lot of them, and many have very strange and impressive life cycles involving many specific hosts. Just about any of them is sci-fi worthy, but this one, in particular, is a real eye-catcher.
Meet Leucochloridium paradoxum, also known as the green-banded broodsac. Like similar flatworms, its lifecycle involves two hosts. The adults, found in the guts of birds, lay eggs which land on the ground in the bird's droppings. The unfortunate host to follow, a snail (Succinea or Oxyloma), then eats the eggs, which hatch in its digestive system…
edyong | February 28, 2009Conspiracy theories, TV thrillers and airport novels are full of the idea that the world is secretly run by a hidden society. We have come up with many names for this shadowy cabal of puppet-masters - the Illuminati, the Freemasons, and more. But a better name would be 'parasites'.
Every animal and plant is afflicted by parasites. The vast majority are simple, degenerate creatures, small in size and limited in intelligence. They affect our health and development, and even our behaviour and culture. And by pulling the strings of key species, parasites can change the face of entire habitats.In…