He found that the blood of cattle who were infected with anthrax always had large numbers of Bacillus anthracis. Koch found that he could transmit anthrax from one animal to another by taking a small sample of blood from the infected animal and injecting it into a healthy one, and this caused the healthy animal to become sick. He also found that he could grow the bacteria in a nutrient broth, then inject it into a healthy animal, and cause illness.
Although these postulates cannot be applied in all cases, they do retain historical importance to the development of scientific thought and are still being used today. The Microscope and Discovery of Microorganisms Antonie van Leeuwenhoek — was one of the first people to observe microorganisms, using a microscope of his own design, and made one of the most important contributions to biology.
Figure: Antoni van Leeuwenhoek : A drawing of Antoni van Leeuwenhoek, one of the first scientists to use a microscope and identify microbes.
Key Points Van Leeuwenhoek is largely credited with the discovery of microbes, while Hooke is credited as the first scientist to describe live processes under a microscope. In his work as a trader in cloth, Van Leeuwenhoek used magnifying glasses to find irregularities in the cotton. He became interested in producing the lenses, blowing the glass and grinding it down himself. His curiosity in the natural world led him to use the lenses to look at other things. In , he used a home-made microscope to become the first person to discover microbes.
He also made over microscopes to view specific objects. He also discovered sperm, which he considered one of the most important discoveries of his career, and described the spermatozoa from molluscs, fish, amphibians, birds and mammals, coming to the novel conclusion that fertilisation occurred when the spermatozoa penetrated the egg. Search term:. Read more. This page is best viewed in an up-to-date web browser with style sheets CSS enabled.
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He attracted attention to such tiny things as bacteria, microbes, and cells. Antonie van Leeuwenhoek changed the world by introducing the science of microbiology. He discovered bacteria and microbes as the smallest living things that had great impacts on human life. The first bacteria were discovered by Antonie van Leeuwenhoek. He was trying to find out why pepper is spicy by keeping pepper in water for three weeks. Instead, he found little living things in motion that were later called bacteria.
Antonie van Leeuwenhoek is famous because he created a major turning point in the course of science. He introduced microbiology and discovered bacteria. By Vejas Liulevicius P. This paradigm shift is often referred to as the Scientific Revolution.
Leeuwenhoek did not have a formal education, but he had a passion for making microscopes. Who was Antonie van Leeuwenhoek?
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