The 20 th Century was a time of great advancement for all forms of science, including microbiology. In addition, people began to realize that microorganisms could cause disease, and did experiments on immunity. Other important advancements in the 19 th Century included the widespread use of the compound microscope and the development of staining techniques in order to better visualize microorganisms. He showed that microorganisms could be filtered out of air by using cotton wool, and he was also able to keep liquids sterile for an extended period of time by boiling them in a swan-necked flask.

This started to change when Louis Pasteur conducted experiments using microorganisms. Although scientists such as Francesco Redi had disproven spontaneous generation as early as the 17 th Century, belief in the theory persisted up to the 19 th Century. For example, people believed that mice arose from soiled cloth combined with wheat if the combination was left out to sit. Spontaneous generation was the belief that living things arose spontaneously from a combination of ingredients, often including ingredients that were inorganic. Microbiology techniques used to disprove the long-held theory of spontaneous generation in the 19 th Century. He was also first to describe protozoa, which are single-celled organisms that include amoebae, and also described yeast, which are fungi, in beer. In 1684, his drawings of bacteria were published in the Royal Society of London’s journal Philosophical Transactions these are the first known drawings of bacteria. Anton von Leeuwenhoek was the first to publish observations of bacteria, which he viewed by looking at water with a microscope. Scientists first observed microorganisms when the first primitive microscopes were developed during the 17 th Century. Microbiology research encompasses all aspects of these microorganisms such as their behavior, evolution, ecology, biochemistry, and physiology, along with the pathology of diseases that they cause. It also includes the study of viruses, which are not technically classified as living organisms but do contain genetic material. Microbiology is the study of microscopic organisms, such as bacteria, fungi, and protists.

What is micro biology