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the Founder of Virology: the losiphovitch Ivanovsky, a prominent english scientist was good in 1864. in 1888 he graduated from petersburg university and began to study the physiology of plants and microbiology.when d. i. Ivanovsky was investigating the tobacco mosaic disease (mosaic disease of tobacco), he was able to come to the conclusion that this disease occurred due to a microscopic agent, many times smaller than bacteria.to prove this first d. i. Ivanovsky had to make many experiments on various plants. he had to pass the juice of the diseased plant through a fine filter which could catch the bacteria making facilities. at that time a little over 70 years ago everybody considered that bacteria were the making facilities, living organisms. but when d. i. Ivanovsky was completed to pass the juice through a fine filter, he was able to come to the conclusion that the living organisms smaller than bacteria existed in the environment, because when he introduced the filtrate of the diseased plants to healthy ones they became infected.before d. i. Ivanovsky nobody had been able to prove the existence of viruses. : the Iosiphovitch Ivanovsky was the first scientist who was able to establish the new branch of microbiology - virology.
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