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.
The Sahel is the transitional zone between the Sahara and the tropical savanna (the Sudan sÃ»dÃ¢n) region and-forest savanna mosaic to the. South The horn Of africa And Southern sudan are geographically part of-Sub Saharan, africa but nevertheless show Strong Middle eastern influence and are also part of The arab. worldince around 5,400 years ago, the Saharan and sub-Saharan regions of Africa have been separated by the extremely harsh climate of the sparsely populated Sahara, forming an effective barrier interrupted by only the Nile River in Sudan, though the Nile was blocked by the river's cataracts.