Schistosoma

Requiring two host, and depending on the type of Schistosoma species their eggs are released through either feces or urine. Although the eggs can live up to a week on dry land, if released into water the larvea called miracidia hatch and start finding the certain species of freshwater snails. When they do find the snail their foot prenetrates into the snail and they transform into sporocysts. The sporocyst multiply asexually producing hundreds of cercariae. Cercariae leaves the snail and starts waiting in the water for the next host. The Cercariae can live up to 48 hours if the odds are in its favor, but in the 48 hours if they sense human skin is near they quickly race over and attach themselves with suckers on to the skin. They find a suitable spot (usually a hair follcile) and penatrate the skin using special enzymes. The head of the cercariae enters and once their in, they travel through our veins. The male and female heads hook up and start producing eggs, which on average they make about 300-3000 eggs per day depending on the species. They attach themselves to the walls of the veins. Some eggs that get loosen out into the blood stream can lead to inflammation in organs such as liver or the lungs. Most eggs travel all the way through to the bladder and ureters, thus exisiting through the urine and feces and starting the cycle all over again. The video above explains the proccess.