Introduction

  Parasitology is the study of parasites and their relationship to their hosts. Not only are parasites of very varied nature, from unicellular organisms to complex multicellular ones, but their study encompasses numerous disciplines, such as taxonomy, ecology and vectors, morphology, physiology, biochemistry, immunology, pathology and pharmacology, nutrition and the broader field of control. The study of parasitology is therefore linked with the study of health sciences and medicine. Human parasitology includes the study of parasitic protozoa, helminthes and arthropods. It therefore adds entomology to the disciplines under study. Let us not forget that, among the six tropical diseases declared undefeated by WHO, five are caused by parasites: malaria,schistosomiasis, filariasis, African trypanosomiasis and leishmaniasis.
There is still work to be done to understand the world of parasites and how we can defeat them!