MRSA Definition and Symptoms. MRSA, methicillin-resistant staphylococcus aureus, is an infection that is caused by a certain strain of staph bacteria that is resistant to the commonly used antibiotics.
The Sahel (/sÉËhÉl/) is the ecoclimatic and biogeographic zone of transition in Africa between the Sahara Desert to the north and the Sudanian Savanna to the south. Having a semi-arid climate, it stretches across the south-central latitudes of Northern Africa between the Atlantic Ocean and the Red Sea.
Early West African States and the Caravan Trade. Mali was not the first empire to occupy the large grasslands region of West. Africa that straddled the Sahara, the semiarid edge of the desert known as the. âSahelâ (literally the âshoreâ of the great ocean of sand, in Arabic) and the. inland delta of the Niger River.