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.
Keratinocyte cells are the building blocks of the skin. They are the most common type of skin cell and make keratin, a protein found in skin, hair, and nails. Keratinocytes are knitted tightly together to form seams between the nerves of the skin and the underlying tissues of the epidermis.ound in hair, keratin is a protein produced by keratinocyte cells. Found in nails, keratin is a protein produced by keratinocyte cells. The stratum is the outermost layer of epidermis that contains dead keratinocyte cells. Pomegranate seed extract may be able to protect keratinocytes from UV damage.