Sporocyst Larva: It looks like an elongated sac, about 0.7 mm long. Its body-wall retains all the layers of body wall of Miracidium except the ciliated ectoderm. During metamorphosis into Sporocyst, the outer coat of ciliated cells is thrown off, the pigment cells of the eye-spot separate from one another and loose their crescentic form and the organism becomes a [...]
In this article we will discuss about the external morphology of roundworm or Ascaris. Ascaris resembles an ordinary earthworm and is the largest intestinal nematode parasitising man. It is milk-white in colour but presents a reddish-yellow shade. Body is elongated, cylindrical, and gradually tapering at both ends. The females are usually 20-25 cm in length and 5 mm in diameter [...]
In this article we will discuss about the life cycle of Ascaris suum in pigs. Eggs in faeces: It has been shown that the female of A. suum may lay as many as 2,00,000 eggs per day. The eggs are laid in the host’s (pig) intestine which are deposited outside along with faeces of host. Development in soil: A Rhabditiform [...]