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History of Microbiolog2

History of Microbiolog2 - 1650's Leewenhoek-Delft Holland...

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History of Microbiology: Until this is properly understood we could never understand contagion. 1546 Fracastorius of Verona wrote of contagium vivum--immersed in a syphilis epidemic at the time. Other terms "Seminaria morbi". Described transmission through inanimate objects--fomites-- Through air--"ad distans" and through direct contact. Work is ignored, no evidence for any of this. It just made sense to him. 1609 Janssen and Galileo grind lenses to produce low resolution microscopes--- microorganisms below the resolution achieved. But improvements were to come. Hooke--Discovers cells with an improved microscope. Schleiden and Schwann discover all plants and animals are composed of cells.
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Unformatted text preview: 1650's Leewenhoek--Delft Holland in the textile industry and part time lens grinder. Got good resolution to allow about 3 or 4 hundred X useful magnification. He put hay and pepper into water and then looked at it through his microscope. He saw microbes in an infusion as seen below. Leewenhoek saw bacteria, protozoa, yeasts and described all the microbial forms we now know, except for viruses. Although he is not mentioned in the science literature as observing his animalcules divide, nevertheless he believed spontaneous generation was untrue and in his original papers called the idea a "bad joke" as related by Dr. Moll at the University of Amsterdam....
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