The life history of Sacculina is extremely interesting. The actual mechanism of fertilisation is not known. Opinion varies regarding the process of fertilisation. According to Delage's view all the batches of the eggs are fertilized by the sperms of the same individual except the first batch. So this kind of fertilisation is known as self fertilisation. But above all the [...]
The adult Sacculina is known as Sacculina externa which is a parasite of young decapod crustacean, the crab. Generally the female crab is parasitized by the Sacculina. The parasitic habit has caused much degeneracy of different structures in the adult and looks like a fleshy tumour. The adult looses all the external appendages, the carapace and the segmentation of the [...]
In this article we will discuss about the life cycle of trypanosoma gambiense. Trypanosoma gambiense is digenetic; i.e., it completes its life cycle in two hosts. The primary or definitive host is man. The mammals, like pigs, buffaloes, antelopes often act as reservoir hosts harbouring the parasite. The intermediate host is blood sucking insect called tsetse fly (Glossina palpalis). Life [...]