Trypanosomiasis refers to a group of diseases caused by Trypanosoma There are two types of trypanosomiasis that affect humans, they are divided according to their geographical location: African trypanosomiasis, or sleeping sickness, is caused by Trypanosoma brucei parasites in sub-Saharan Africa and is transmitted by the tsetse fly? (Glossina).
Specilized cells in the epidermis called melanocytes produce melanin, a dark pigment that provides skin color. Melanin absorbs ultraviolet radiation in sunlight and preventing mutations in the DNA of skin cells and other damaging effects.ifferences in skin color result from differences in the amount of melanin that melanocytes produce and the distribution and size of pigment granules. Skin color is genetically determined.
At the bottom of the basal layers of our skin we have these cells call melanocytes. These cells are responsible for the production of melanin through a process called melanogenesis. Melanin is the pigment that gives our skin, eyes and hair its color[1]. It is also one of the several skin chromophores our skin supports. Chromophores are molecules that absorb light. In doing so, they impart a specific color. ( we will discuss light absorption and color in another science post).