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.
Sahel. The Sahel[p] is the ecoclimatic and biogeographic zone of transition, in Africa, between the Sahara desert to the north and the Sudanian Savannas to the south, having a semi-arid climate. It stretches across the north of the African continent between the Atlantic Ocean and the Red Sea.