{"id":6766,"date":"2025-02-17T10:24:18","date_gmt":"2025-02-17T10:24:18","guid":{"rendered":"https:\/\/site.itshrt.com\/worldnews\/louis-pasteurs-relentless-hunt-for-germs-floating-in-the-air\/"},"modified":"2025-02-17T10:24:18","modified_gmt":"2025-02-17T10:24:18","slug":"louis-pasteurs-relentless-hunt-for-germs-floating-in-the-air","status":"publish","type":"post","link":"https:\/\/site.itshrt.com\/worldnews\/louis-pasteurs-relentless-hunt-for-germs-floating-in-the-air\/","title":{"rendered":"Louis Pasteur\u2019s Relentless Hunt for Germs Floating in the Air"},"content":{"rendered":"<p> <script async src=\"https:\/\/pagead2.googlesyndication.com\/pagead\/js\/adsbygoogle.js?client=ca-pub-6606220950177433\"\r\n     crossorigin=\"anonymous\"><\/script>\r\n<!-- ItShrt World News -->\r\n<ins class=\"adsbygoogle\"\r\n     style=\"display:block\"\r\n     data-ad-client=\"ca-pub-6606220950177433\"\r\n     data-ad-slot=\"1882483372\"\r\n     data-ad-format=\"auto\"\r\n     data-full-width-responsive=\"true\"><\/ins>\r\n<script>\r\n     (adsbygoogle = window.adsbygoogle || []).push({});\r\n<\/script>\r\n<br \/>\n<\/p>\n<div data-testid=\"companionColumn-0\">\n<div class=\"css-53u6y8\">\n<p class=\"css-at9mc1 evys1bk0\">Louis Pasteur was at his most comfortable when working in his Paris laboratory. It was there that he had some of his greatest scientific triumphs, including experiments that helped confirm germs can cause disease. \u201cEverything gets complicated away from the laboratory,\u201d he once complained to a friend.<\/p>\n<p class=\"css-at9mc1 evys1bk0\">But in 1860, years before he became famous for developing vaccines and heating milk to kill pathogens, Pasteur ventured to the top of a glacier, on a remarkable quest for invisible life.<\/p>\n<p class=\"css-at9mc1 evys1bk0\">He and a guide began at the base of Mont Blanc in the Alps, hiking through dark stands of pines. Behind them, a mule carried baskets of long\u2011necked glass chambers that sloshed with broth. They ascended a steep trail until they reached Mer de Glace, the sea of ice.<\/p>\n<p class=\"css-at9mc1 evys1bk0\">The wind blew briskly over the glacier, and the vale echoed with the sound of frozen boulders crashing down the slopes. Pasteur struggled to make out the path in the glare of sunlight bouncing off the ice.<\/p>\n<\/div>\n<aside class=\"css-ew4tgv\" aria-label=\"companion column\"\/><\/div>\n<div data-testid=\"companionColumn-1\">\n<div class=\"css-53u6y8\">\n<p class=\"css-at9mc1 evys1bk0\">When the scientist reached an altitude of 2,000 meters, he finally stopped. He removed one of the glass chambers from the mule\u2019s pack and raised it over his head. With his free hand, he grabbed a pair of tongs and used them to snap off the end of the neck. The cold air rushed inside the container.<\/p>\n<p class=\"css-at9mc1 evys1bk0\">The sight of Pasteur holding a globe of broth over his head would have baffled other travelers visiting Mer de Glace that day. If they had asked him what he was doing, his answer might have seemed mad. Pasteur was on a hunt, he later wrote, for \u201cthe floating germs of the air.\u201d<\/p>\n<p class=\"css-at9mc1 evys1bk0\">Now, 165 years later, scientists around the world <a class=\"css-yywogo\" href=\"https:\/\/www.nytimes.com\/2024\/09\/09\/science\/high-altitude-germs.html\" title=\"\">hunt for floating germs<\/a>. Some study how coronaviruses wafting through <a class=\"css-yywogo\" href=\"https:\/\/pmc.ncbi.nlm.nih.gov\/articles\/PMC8656245\/\" title=\"\" rel=\"noopener noreferrer\" target=\"_blank\">buses<\/a> and <a class=\"css-yywogo\" href=\"https:\/\/pmc.ncbi.nlm.nih.gov\/articles\/PMC7954773\/\" title=\"\" rel=\"noopener noreferrer\" target=\"_blank\">restaurants<\/a> spread Covid. Spores of fungi can travel thousands of miles, infecting people and plants. <a class=\"css-yywogo\" href=\"https:\/\/pmc.ncbi.nlm.nih.gov\/articles\/PMC8586456\/\" title=\"\" rel=\"noopener noreferrer\" target=\"_blank\">Oceans<\/a> deliver microbes into the air with every crashing wave. <a class=\"css-yywogo\" href=\"https:\/\/www.frontiersin.org\/journals\/microbiology\/articles\/10.3389\/fmicb.2023.1186847\/full\" title=\"\" rel=\"noopener noreferrer\" target=\"_blank\">Even clouds<\/a>, scientists now recognize, are alive with microbes.<\/p>\n<p class=\"css-at9mc1 evys1bk0\">The sky\u2019s ecosystem is known as the <a class=\"css-yywogo\" href=\"https:\/\/pubmed.ncbi.nlm.nih.gov\/37211511\/\" title=\"\" rel=\"noopener noreferrer\" target=\"_blank\">aerobiome<\/a>. In Pasteur\u2019s day, it had no name. The very idea of living things drifting through the air was too strange to imagine.<\/p>\n<\/div>\n<aside class=\"css-ew4tgv\" aria-label=\"companion column\"\/><\/div>\n<div data-testid=\"companionColumn-2\">\n<div class=\"css-53u6y8\">\n<p class=\"css-at9mc1 evys1bk0\">But Pasteur began to wonder about the possibility of airborne life when he was a little-known chemist teaching at the University of Lille in France. There, the father of one his students approached him for help. The man owned a distillery where he used yeast to turn beet juice into alcohol. But the juice had inexplicably turned rancid.<\/p>\n<\/div>\n<aside class=\"css-ew4tgv\" aria-label=\"companion column\"\/><\/div>\n<div data-testid=\"companionColumn-3\">\n<div class=\"css-53u6y8\">\n<p class=\"css-at9mc1 evys1bk0\">Inspecting the liquid under a microscope, Pasteur discovered dark rods \u2014 bacteria rather than yeast \u2014 in the sour vats. The discovery helped him work out a theory of fermentation: Microorganisms absorbed nutrients and then produced new compounds. Depending on the species, they could turn butter rancid or grape juice into wine.<\/p>\n<p class=\"css-at9mc1 evys1bk0\">The discovery won Pasteur a prestigious new post in Paris. In his account of the discovery, Pasteur suggested in passing that the bacteria might have floated through the air and settled into the vats. That notion earned him an angry letter from F\u00e9lix\u2011Archim\u00e8de Pouchet, one of France\u2019s leading naturalists.<\/p>\n<p class=\"css-at9mc1 evys1bk0\">Pouchet informed Pasteur that the microorganisms Pasteur discovered had not dropped into the vats from the air. Instead, the beet juice had spontaneously generated them. \u201cSpontaneous generation is the production of a new organized being that lacks parents and all of whose primordial elements have been drawn from ambient matter,\u201d Pouchet had written earlier.<\/p>\n<p class=\"css-at9mc1 evys1bk0\">Pasteur coolly replied that Pouchet\u2019s spontaneous generation experiments were fatally flawed. The conflict between Pasteur and Pouchet prompted the French Academy of Sciences to announce a contest for the best study addressing whether spontaneous generation was real or not. What started as a private spat had turned into a public spectacle. Pasteur and Pouchet both signed up to compete for the prize of 2,500 francs.<\/p>\n<\/div>\n<aside class=\"css-ew4tgv\" aria-label=\"companion column\"\/><\/div>\n<div data-testid=\"companionColumn-4\">\n<div class=\"css-53u6y8\">\n<p class=\"css-at9mc1 evys1bk0\">The public eagerly followed the competition, struggling to imagine either view of life. Spontaneous generation had the whiff of blasphemy: If life could spring into existence, it did not require divine intervention. But Pasteur\u2019s claim that the atmosphere teemed with germs also strained the 19th\u2011century mind. A French journalist informed Pasteur that he was going to lose the contest. \u201cThe world into which you wish to take us is really too fantastic,\u201d he said.<\/p>\n<\/div>\n<aside class=\"css-ew4tgv\" aria-label=\"companion column\"\/><\/div>\n<div data-testid=\"companionColumn-5\">\n<div class=\"css-53u6y8\">\n<p class=\"css-at9mc1 evys1bk0\">To prove that his world was real, Pasteur set out to pluck germs from the air. Working with glassblowers, he created flasks with narrow openings that stretched for several inches. He filled them with sterile broth and waited to see if anything would grow inside. If the necks were pointed straight up, the broth often turned cloudy with microorganisms. But if he sloped the necks so that the openings pointed down, the broth stayed clear. Pasteur argued that germs in the air could drift down into the flasks, but could not propel themselves up a rising path.<\/p>\n<p class=\"css-at9mc1 evys1bk0\">When Pouchet heard about Pasteur\u2019s experiments, he sneered. Did Pasteur really believe that every germ in decaying organic matter came from the air? If that were true, every cubic millimeter of air would have been packed with more germs than all the people on Earth. \u201cThe air in which we live would almost have the density of iron,\u201d Pouchet said.<\/p>\n<p class=\"css-at9mc1 evys1bk0\">Pasteur responded by changing his hypothesis. Germs were not everywhere, he said. Instead, they drifted in clouds that were more common in some places than others.<\/p>\n<\/div>\n<aside class=\"css-ew4tgv\" aria-label=\"companion column\"\/><\/div>\n<div data-testid=\"companionColumn-6\">\n<div class=\"css-53u6y8\">\n<p class=\"css-at9mc1 evys1bk0\">To prove his claim, Pasteur took his straight-necked flasks out of his lab and began collecting germs. In the courtyard of the Paris Observatory, all 11 of his flasks turned cloudy with multiplying germs. But when he traveled to the countryside and ran his experiment again, more of his flasks stayed sterile. The farther Pasteur got from human settlements, the sparser airborne life became. To put that idea to an extreme test, Pasteur decided to climb Mer de Glace.<\/p>\n<p class=\"css-at9mc1 evys1bk0\">His first foray to the glacier ended in failure. After holding up a flask, he tried using the flame from a lamp to seal its neck shut, but the glare of the sun made the flame invisible. As Pasteur fumbled with the lamp, he worried that he might be contaminating the broth with germs he carried on his skin or his tools. He gave up and trudged to a tiny mountain lodge for the night.<\/p>\n<p class=\"css-at9mc1 evys1bk0\">He left his flasks open as he slept. In the morning they were rife with microorganisms. Pasteur concluded that the lodge was packed with airborne germs that travelers had brought from around the world.<\/p>\n<p class=\"css-at9mc1 evys1bk0\">Later that day, Pasteur modified his lamp so that the flame would burn bright enough for him to see it under the glacier-reflected sun. When he climbed back up Mer de Glace, the experiment worked flawlessly. Only one of the flasks turned cloudy with germs. The other 19 remained sterile.<\/p>\n<p class=\"css-at9mc1 evys1bk0\">In November 1860, Pasteur arrived at the Academy of Sciences in Paris with the 73 flasks he had used on his travels. He entered the domed auditorium, walked up to the table where the prize committee sat, and laid out the flasks. The judges peered at the broth as Pasteur described his evidence, saying it gave \u201cindubitable proof\u201d of floating germs in inhabited places.<\/p>\n<\/div>\n<aside class=\"css-ew4tgv\" aria-label=\"companion column\"\/><\/div>\n<div data-testid=\"companionColumn-7\">\n<div class=\"css-53u6y8\">\n<p class=\"css-at9mc1 evys1bk0\">Pouchet refused to accept the evidence, but nevertheless withdrew from the contest. Pasteur was awarded the prize.<\/p>\n<p class=\"css-at9mc1 evys1bk0\">Still, the two continued to spar. The rivalry remained so intense that the Academy set up a new commission to evaluate their latest experiments. Pouchet dragged out the proceedings, demanding more time for his research.<\/p>\n<p class=\"css-at9mc1 evys1bk0\">Pasteur decided to seize public opinion and put on a spectacle. On the evening of April 7, 1864, in an amphitheater filled with Parisian elites, Pasteur stood surrounded by lab equipment and a lamp to project images on a screen. He told the audience it would not leave the soiree without recognizing that the air was rife with invisible germs. \u201cWe can\u2019t see them now, for the same reason that, in broad daylight, we can\u2019t see the stars,\u201d he said.<\/p>\n<\/div>\n<aside class=\"css-ew4tgv\" aria-label=\"companion column\"\/><\/div>\n<div data-testid=\"companionColumn-8\">\n<div class=\"css-53u6y8\">\n<p class=\"css-at9mc1 evys1bk0\">At Pasteur\u2019s command, the lights went out, save for a cone of light that revealed floating motes of dust. Pasteur asked the audience to picture a rain of dust falling on every surface in the amphitheater. That dust, he said, was alive.<\/p>\n<p class=\"css-at9mc1 evys1bk0\">Pasteur then used a pump to drive air through a sterile piece of cotton. After soaking the cotton in water, he put a drop under a microscope. He projected its image on a screen for the audience to see. Alongside soot and bits of plaster, they could make out squirming corpuscles. \u201cThese, gentlemen, are the germs of microscopic beings,\u201d Pasteur said.<\/p>\n<p class=\"css-at9mc1 evys1bk0\">Germs were everywhere in the air, he said \u2014 kicked up in dust, taking flights of unknown distances and then settling back to the ground, where they worked their magic of fermentation. Germs broke down \u201ceverything on the surface of this globe which once had life, in the general economy of creation,\u201d Pasteur said.<\/p>\n<p class=\"css-at9mc1 evys1bk0\">\u201cThis role is immense, marvelous, positively moving,\u201d he added.<\/p>\n<p class=\"css-at9mc1 evys1bk0\">The lecture ended with a standing ovation. Pasteur\u2019s hunt for floating germs elevated him to the highest ranks of French science.<\/p>\n<p class=\"css-at9mc1 evys1bk0\">By the time he died 31 years later, Pasteur had made so many world-changing discoveries that his many eulogies and obituaries did not mention his trip to Mer de Glace.<\/p>\n<p class=\"css-at9mc1 evys1bk0\">But scientists today recognize that Pasteur got the first glimpse of a world that they are only starting to understand. They now know that life infuses the atmosphere far more than he had imagined, all the way to the <a class=\"css-yywogo\" href=\"https:\/\/www.microbiologyresearch.org\/content\/journal\/ijsem\/10.1099\/ijs.0.010876-0\" title=\"\" rel=\"noopener noreferrer\" target=\"_blank\">stratosphere<\/a>. Our thriving aerobiome has led some scientists to argue that alien aerobiomes may float in the clouds of <a class=\"css-yywogo\" href=\"https:\/\/www.liebertpub.com\/doi\/full\/10.1089\/ast.2022.0113\" title=\"\" rel=\"noopener noreferrer\" target=\"_blank\">other planets<\/a>. Ours is not the only world that seems too fantastic to believe.<\/p>\n<\/div>\n<aside class=\"css-ew4tgv\" aria-label=\"companion column\"\/><\/div>\n<p><script async src=\"https:\/\/pagead2.googlesyndication.com\/pagead\/js\/adsbygoogle.js?client=ca-pub-6606220950177433\"\r\n     crossorigin=\"anonymous\"><\/script>\r\n<!-- ItShrt World News -->\r\n<ins class=\"adsbygoogle\"\r\n     style=\"display:block\"\r\n     data-ad-client=\"ca-pub-6606220950177433\"\r\n     data-ad-slot=\"1882483372\"\r\n     data-ad-format=\"auto\"\r\n     data-full-width-responsive=\"true\"><\/ins>\r\n<script>\r\n     (adsbygoogle = window.adsbygoogle || []).push({});\r\n<\/script>\r\n<br \/>\n<br \/><a href=\"https:\/\/www.nytimes.com\/2025\/02\/17\/science\/airborne-louis-pasteur-germs.html\">Source link <\/a><\/p>\n","protected":false},"excerpt":{"rendered":"<p>Louis Pasteur was at his most comfortable when working in his Paris laboratory. It was there that he had some<\/p>\n","protected":false},"author":1,"featured_media":6767,"comment_status":"","ping_status":"","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[38],"tags":[2221,2598,1447,2597,268,188],"class_list":["post-6766","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-science","tag-bacteria","tag-louis","tag-microbiology","tag-pasteur","tag-research","tag-your-feed-science"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v24.2 - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>Louis Pasteur\u2019s Relentless Hunt for Germs Floating in the Air - World News<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/site.itshrt.com\/worldnews\/louis-pasteurs-relentless-hunt-for-germs-floating-in-the-air\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Louis Pasteur\u2019s Relentless Hunt for Germs Floating in the Air - World News\" \/>\n<meta property=\"og:description\" content=\"Louis Pasteur was at his most comfortable when working in his Paris laboratory. 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