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PHARMACEUTICAL MICROBIOLOGY UNIT- I - SNS Courseware

• In 1892, the Russian biologist Dmitri Ivanovsky used this filter to study what is now known as the tobacco mosaic virus: crushed leaf extracts from infected tobacco plants remained infectious even after filtration to remove bacteria. • Ivanovsky suggested the infection might be caused by a toxin produced by bacteria, but did not

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  Microbiology, Russian, Leaf

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