Aminoglycosides are excreted by glomerular filtration and have a serum half-life of 2 to 3 h; the half-life increases exponentially as the GFR falls (eg, in renal insufficiency, in the elderly).
Madagascar is the world's major natural vanilla producer, accounting for about 75% of production. Cloves are the third main export crop, grown mostly by smallholders. Production follows a 4-year cycle with 2â3 years of high output followed by one year of low production.
Madagascar country profile. Read more about sharing. Situated off the southeast coast of Africa, Madagascar is the fourth largest island in the world. Having developed in isolation, the island nation is famed for its unique wildlife. Traditionally, the Malagasy economy has been based on the cultivation of paddy rice, coffee, vanilla and cloves.