**5. Conclusion**

The morphological development of the parasite has been regulated by the environment in which it is found, being perceived by chemotactic receptors that identify these environmental changes (e.g. pH and oxygenation), modulating several genes and thus triggering various intracellular processes, processes that depend on the stage of development that the parasite is at when receiving such stimuli. About the molecular aspects involved in the infection, we can say that current research has indicated a strong relationship between the immune response and the way in which leishmaniasis will manifest itself.

In order to benefit the socio-economically vulnerable individuals affected by leishmaniasis, many young researchers start their studies in leishmaniasis from an early age in scientific initiation programs, often conducting their studies well beyond the PhD. These young researchers are the audience that this book chapter is dedicated. Because we believe that the study and understanding of the life cycle of Leishmania are mandatory for all researchers who intend to dedicate their careers to the different aspects of this important disease. From epidemiological studies to the development of new therapies, a good understanding of the parasite's life cycle is essential for the success of all initiatives.
