In this article we will discuss about the structure and life history of flagellate or Giardia intestinalis (explained with diagram). Structure of Flagellate: Flagellate occurs in two different forms: 1. Trophozoite or feeding stage and 2. Cystic stage. 1. Trophozoite or Feeding stage: It possesses a bilateral symmetrical body with organelles occurring in pairs and measures 10-18 μm length. The [...]
Haemoflagellates has two stages in its life cycle: A. the amastigote form, occurring in man and B. the promastigote form occurring in sand-fly. A. Life cycle in Man: (a) Infection: L. donovani is transmitted to man by the sand-fly, Phlebotomus argentipes. In case of this parasite sand-fly acts as vector. The insect vector which has fed on some suitable fruit [...]
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 [...]