Soviet microbiologist and botanist. Born in Russia in 1864. was the first scientist to discover the virus in 1892, studying the so-called snuff mosaic virus. studied at the University of San Petersburg (Russia). In 1887 he began to investigate a disease affecting the sole of snuff, which is manifested by the formation of a strange design with a mosaic on the leaves and to which he referred to as "wildfire" (meaning "spread like wildfire" ), the speed with which it developed.
could not find the organism that causes it, like Pasteur could not find the rage. Ivanovski infected leaves submerged in a liquid to soften and the thick liquid was passed through a very fine filter designed to retain all bacteria. If the liquid that passed did not infect the plants of healthy snuff could conclude that this was a bacterial cause, but simply had not identified the bacteria. But he found that the liquid passing through the filter if they could infect healthy plants. Could conclude from this that the organism causing mosaic disease of snuff was much smaller than bacteria and could pass through a filter whose pores were too thin for the bacteria. Ivanovski but preferred to believe that your filter was flawed and that the organism had passed through small loopholes in it.
Three years later, in 1895, a Dutch botanist, Martinus Willem Beijerinck repeated the same experiment, but assumed that the filters were imperfect. He insisted that the infecting organism was considerably smaller than bacteria. Do not speculate about their chemical or physical nature. I call it "filterable virus." As virus is a Latin word meaning "poison", Beijerinck was simply calling it "poison that passes through a filter."
died in Rostov-on-Don (Russia) on June 20, 1920.
work Author: Benedito Vera, Elena.
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