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.
Sub-Saharan Africa. Sub-Saharan Africa is, geographically, the area of the continent of Africa that lies south of the Sahara. Politically, it consists of all African countries that are fully or partially located south of the Sahara. It contrasts with North Africa, which is considered a part of the Arab world.Somalia, Djibouti, Comoros and Mauritania are geographically part of Sub-Saharan Africa, but also part of the Arab world. The Sahel is the transitional zone between the Sahara and the tropical savanna and forest-savanna mosaic to the south.olitically, it consists of all African countries that are fully or partially located south of the Sahara. It contrasts with North Africa, which is considered a part of the Arab world. Somalia, Djibouti, Comoros and Mauritania are geographically part of Sub-Saharan Africa, but also part of the Arab world.