Antoni van Leeuwenhoek Click to see full answer. In this manner, who first discovered bacteria? Van Leeuwenhoek One may also ask, which microscope did van Leeuwenhoek use to view Animalcules? 1590s–1720s). Using single-lensed microscopes of his own design, van Leeuwenhoek was the first to experiment with microbes, which he originally referred to as dierkens, diertgens or diertjes (Dutch for “small animals” [translated into English as animalcules, from Latin animalculum = “tiny animal”]). In this way, what year did Antonie van Leeuwenhoek invent the microscope? Anton van Leeuwenhoek (October 24, 1632–August 30, 1723) invented the first practical microscopes and used them to become the first person to see and describe bacteria, among other microscopic discoveries.How did Leeuwenhoek discovered bacteria?Leeuwenhoek wasn’t a trained scientist, but he made his mark on the history of biology by creating lenses powerful enough to observe what no person had before: red blood cells, sperm cells, protozoa, and bacteria.