The following points highlight the four main terms that have been widely used for various types of heterogenetic association: 1. Phoresis 2. Amensalism 3. Commensalism 4. Mutualism and Symbiosis. Term # 1. Phoresis: Phoresis is a term used for a particular type of heterogenetic association in which one individual merely provides shelter, support or transport for another organism of a [...]
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 [...]