Definition of fatalism from the Collins English Dictionary Aspect When we use a verb, we often need to be able to refer to more than the time at which an event took place.
Influential in the field of medical microbiology. Pasteur worked toward cures for diseases and processing methods for reducing harmful bacteria in milk, wine, and other products.His work also helped reduce mortality rates from puerperal fever.
Discovery and history. Bacteria were first detected under the microscopes of Antony van Leeuwenhoek in the 17th century. Leeuwenhoek, a Dutch scientist, performed many experiments testing and observing bacteria. He observed plaque on his own teethâ âa little white matterâ as he called it. Under microscopes he saw âthat in the said matter there were many very little living animalcules, very prettily a-moving,â which was the first sighting of oral bacteria as we know it. Leeuwenhoek tested the mouths of others, as well as his own.