Gin and tonic with Hendrick's Gin is typically garnished with a slice of cucumber. However, garnishes of cucumber are very rare, and garnishes of orange are rarer still. The cocktail was introduced by the army of the British East India Company in India. In India and other tropical regions, malaria was a persistent problem. In the 1700s it was discovered by Scottish doctor George Cleghorn that quinine could be used to prevent and treat the disease. The quinine was drunk in tonic water, however the bitter taste was unpleasant. British officers in India in the early 19th century took to adding a mixture
Diagnosis of malaria microscope and centrifuge that can be deployed to rural areas in the third world. "Plasmodium malariae" and "P. knowlesi" (which is the most common cause of malaria in South-east Asia) look very similar under the microscope. However, "P. knowlesi" parasitemia increases very fast and causes more severe disease than "P. malariae", so it is important to identify and treat infections quickly. Therefore, modern methods such as PCR (see "Molecular methods" below) or monoclonal antibody panels that can distinguish between the two should be used in this part of the world. For areas where microscopy is not available, or where laboratory