Retrograde orbit: the satellite (red) orbits in the direction opposite to the rotation of its primary (blue/black) Retrograde motion is motion in the direction opposite to the movement of something else and the contrary of direct or prograde motion. This motion can be the orbit of one body about another body or about some other point, or the rotation of a single body about its axis, or other phenomena such as precession or nutation of the axis.
Most of the research done on T. brucei's metabolism is on the microbe's lifecycle; however, T. brucei has shown to be a the most metabolically restrictive species of the Trypanosoma genus.(6) It is thought that horizontal gene transfer from bacteria to the Tritryp lineage is the cause of this versatility.
Trypanosomiasis refers to three types of infections caused by protozoa* and spread to humans through insect bites. There are two kinds of African trypanosomiasis, East African and West African. Both of these varieties also are known as sleeping sickness.The disease can affect people living on the African continent south of the Sahara Desert. American trypanosomiasis also is called Chagas (SHAH-gus) disease. It occurs only on the American continents, from Mexico to Argentina.rypanosomiasis (trÉpÄnÂ´ÉsÅmÄ«Â´Ésis) , infectious disease caused by a protozoan organism, the trypanosome, which exists as a parasite in the blood of a number of vertebrate hosts. The three variations of the disease that predominate in humans are transmitted by an insect vector.