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.
â Only one made in skin, made by melanocytes â Color ranges from yellow to reddish-brown to black â¢ Carotene â Yellow to orange pigment from certain plant products â¢ Hemoglobin â Pinkish hue of skin color, particularly in lighter skinned people â Reflects oxygenated blood in dermal layer â¢ Damages and Diseases of the Skin Burns 1. First-degree: only some of epidermis damaged 2. Second-degree: damage to epidermis and upper region of dermis 3. Third-degree: damage through entire thickness of skin Skin Cancer 1.