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. World Mosquito Day is celebrated on August 20. But this is not a celebration of mosquitoes. But rather it was a day in 1897 when British doctor Sir Ronald Ross discovered while he was working in the Indian Medical Services in Kolkata. that it was the female mosquito that spread the deadly malaria parasite among human beings.Accoding to the WHO in 2010 there were 655000 malarial deaths worldwide.At around 106 countries and territories 3.3 billion poplple are at risk of getting malaria. The African region claimed 91 percent of the deaths followed by South East Asia and Eastern Mediterranean region. Children were found more vulnerable to the deadly parasite with 86 percent getting affected by malaria. In poverty stricken African countries reports say that a child dies of malaria every 30 seconds.images (2)
Shortly after his discovery Sir Ronald Ross requested  that the day be observed as World Mosquito Day thereafter. Sir Ronald Ross became the first British person to receive the Noble prize in Medicine in 1902  for his extensive research on malaria. Malaria has been buzzing around for thousands of years. Around 12000 years ago when the humidity level rose in Africa  creating pools of water and stagnation puddles it became a favourable breeding ground for the parasites and their transmitters— mosquitoes. The term Malaria comes from the Italian  Mal or bad and Aria or air. Our ancestors thought that it was the foul air that rose in the late evenings from the puddles that gave them  the chills and fever. So all doors and windows were shut to keep out the bad air. Now we do the same with a little more inkling of what the bad air brings along with it from the stagnating puddles—- the mosquitoes.images (3)
Malaria is spread by a type of microscopic parasite called Plasmodium which is transmitted mainly by the night biting female Anopheles Mosquito. There are a few varieties of Plasmodium parasites that cause malaria in humans. alphonse Laveran, a French military doctor discovered the protozoan parasite in 1880  for which he was awarded the Noble Prize in 1907. Italian researchers Grassi and Filetti discovered Plasmodium Vivaz and Plasmodium malariae parasites in 1890. American researcher Welch discovered Plasmodium Falciparum in 1786 and stephens discovered the last parasite Plasmodium ovale in 1922.images
It was Ronald Ross who discovered that these parasites were lodged in the gastrointestinal tract of the female Anopheles mosquitoes. And that the disease was transmitted to humans by the bite of the mosquitoes which he initially called “Dapple Wings.” Malaria is found in most tropical countries including Africa and Asia. Dominican  Republic  Haiti Central and South America Pacific Islands and some parts of Middle Eastimages (1)
courtesy         THE HINDU


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