Photo courtesy of CDC
The cercaria have long tails which are bifurcated at the end. The tegument is covered with a trilaminate plasma membrane, and on the outer surface with a glycocalyx, and is equipped with spines and sensory papillae.
Photo courtesy of CDC.
Photo courtesy of Cambridge University
[INCUBATION]
There is no incubation period in humans. For incubation period in intermediate hosts, refer to life cycle.