Here it encysts, forming a cysticercus. An example is either cysticercoid, cysticercus, or a hydatid cyst. In pigs cysticercus has a tendency to produce cysticercosis. Humans are colonised by the larval stage, the cysticercus, from undercooked pork or other meat. The cysticercus is often called the metacestode. In pigs, the cysticercus can produce cysticercosis. The cysticercus larva completes development in about 2 months. A cysticercus is a bladder-like transparent vesicle. It can take various forms, for example, the hydatid cyst, strobilocercus, cysticercus or cysticercoid. When the worm reaches the liver the larva transforms into a cysticercus form. This shape is called a "cysticercus", that is part of the "metacestodes" stage of life. A cysticercus grows into an adult worm in human small intestines. Cysticercus was discovered in the late 17th century CE as a parasitic bladder.