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: 1. Symptoms and Pathogenesis of Amoebic Dysentery or Amoebiasis 2. Prophylaxis (Prevention) and TreatÂment of Amoebic Dysentery. Symptoms and Pathogenesis of Amoebic Dysentery or Amoebiasis: Generally E. histolytica lives in the lumen of large intestine of man as harmless minute forms. The trophozoite stage of this parasite penetrate mucosa and submucosa and here [...]
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 [...]