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.
The epidermis is the outer layer of the skin. This is the part we see. New cells are made in this layer constantly. The bottom of the epidermis is where this takes place. The new cells move up as they are ready to take their place in the middle of the epidermis.he epidermis is also where you will find melanin, which is produced by cells in the epidermis called melanocytes. Melanin is what gives our skin the color it has. The more melanin, the darker the skin. It provides some protection from the burning rays of the sun.