350 Years Later: A Creation Lens on the Birth of Bacteriology

Although not formally trained as a scientist, the Dutch Draper would discover, describe, and declare to the world of minuscule. I appreciate that Leeuwenhoek was motivated by curiosity, not fame or fortune.3

In 1674, he likely saw protozoa from nearby water sources, and by 1675–76, he was looking at rainwater and pepper water.4 He is thought to have seen bacteria as early as the spring of 1676.5 In October of 1676, a letter with drawings clearly showing both protozoa and bacteria were published. He had seen blue green algae (cyanobacteria), mites, nematodes, and many other small animals6 with his simple microscope that was first used to examine fibers in men’s clothing.

When in 1676 he described finding microorganisms that were so small that “ten thousand of these living creatures could scarce equal the bulk of a coarse sand grain,” they [the natural philosophers of the Royal Society of London] requested corroboration from other eyewitnesses. Several friends sent affidavits that they also saw these things through Antony’s microscope. As Leeuwenhoek’s observations were found to be accurate, his reputation grew, and by 1680 he was elected a fellow of the Royal Society.

Though he never revisited London or attended a meeting, the amateur microscopist kept up a lively correspondence with the British scientists, who translated hundreds of his letters and published them in their Philosophical Transactions.

Leeuwenhoek’s letters sparkle with the excitement of discovery. Describing the “wee animalcules” (protozoa and bacteria) he observed in a drop of fresh water, he wrote, “The motion of most of them in the water was so swift, and so various, upwards, downwards, and roundabout, that I admit I could not but wonder at it. I judge that some of these little creatures were above a thousand times smaller than the smallest ones which I have hitherto seen. . . . Some of these are so exceedingly small that millions of millions might be contained in a single drop of water.”7

Early microbiologists like Antonie van Leeuwenhoek saw God’s “incomprehensible perfection” and “providential care” in animalcules (microorganisms), believing these tiny creatures clearly pointed to a wise Creator. Antonie van Leeuwenhoek was a devout Christian who saw his groundbreaking discoveries of microorganisms as profound evidence of God’s marvelous creation, believing life was divinely designed and created, not spontaneously generated. His faith emphasized Scripture and the beauty of nature, viewing his microscopic observations as uncovering God’s intricate handiwork, a perspective that aligned with, or at least didn’t challenge, the church’s teachings on creation. As one author noted, “Leeuwenhoek believed in God as piously as any Seventeenth century Dutchman. He always referred to God as the Great All.”8 I believe that Leeuwenhoek mysteriously and providentially had “ordered steps” 350 years ago. God was involved with the discovery of microbes.

Antonie van Leeuwenhoek was a devout Christian who saw his groundbreaking discoveries of microorganisms as profound evidence of God’s marvelous creation.

Leeuwenhoek was of the Dutch Reformed faith. In the 1600s, the Dutch Reformed Church held a strict, literal, and theological view of creation.9 They believed in creation ex nihilo (creation out of nothing) by the triune God, holding that God created all things in six days through his Word. Creation was considered perfect, designed for a specific purpose to glorify God, with humans as the pinnacle of this creation. Key aspects of the 1600s Dutch Reformed view of creation included:10

• Literal interpretation: The Genesis account was understood literally, with God establishing the universe in six days.
• “Good” creation: Everything created was initially declared “good,” though it was subsequently corrupted by the fall of man.

In essence, Leeuwenhoek’s religious beliefs provided the framework for his scientific inquiries, motivating him to explore the microscopic world as a way to understand the Creator better.

The Ordered Steps of Antonie van Leeuwenhoek Timeline

The following are the ordered steps of Antonie van Leeuwenhoek’s journey from a tradesman to the “Father of Microbiology”:11

• 1632: Born in Delft, Netherlands
  Antonie van Leeuwenhoek was born on October 24, 1632, in Delft, Netherlands. He had four older sisters but no brothers. His family were Dutch dwellers of a highly respected type and church people. They were basket makers and brewers. Leeuwenhoek’s father died early. His mother read him a Dutch Bible and sent him to school until the age of 16.
• 1648–1654: Apprenticeship in Amsterdam
  At age 16, Leeuwenhoek was sent to Amsterdam to apprentice as a draper (cloth merchant). He learned the trade of measuring and selling textiles, which introduced him to simple magnifying glasses used to inspect the quality of thread.
• 1654–1660s: Establishing Business and Public Service
  He returned to Delft, opened his own drapery shop, and took on various municipal roles, such as chamberlain for the Delft sheriffs.
• 1668: Inspiration from London
  During a visit to London, he likely encountered Robert Hooke’s Micrographia (published in 1665), which featured detailed microscopic drawings of insects and textiles. This spurred his interest in creating more powerful lenses.
• 1671: Crafting the First Lenses
  He began grinding his own small, high-quality spherical lenses. Unlike the compound microscopes of the time, his were simple, single-lens devices that could magnify objects up to 300 times—far exceeding the 40–50x magnification of Hooke’s models.
• 1673: Initial Correspondence with the Royal Society
  Encouraged by Dutch physician Reinier de Graaf, Leeuwenhoek began writing to the Royal Society of London. His first letters described observations of bee stings, mold, and lice.
• 1674: Discovery of “Animalcules”
  While examining pond water from a lake near Delft (Berkelse Mere), he observed tiny, moving organisms for the first time, calling these single-celled organisms “animalcules.”
• 1676–1677: Discovery of Bacteria and Spermatozoa
  In 1676, he reported the first sighting of bacteria, which he found in rainwater and dental plaque. In 1677, he described human and animal spermatozoa, which he believed were the origin of life.
• 1680: Election to the Royal Society
  Despite being a tradesman with no formal scientific training, the Royal Society recognized his groundbreaking work by electing him a fellow.
• 1683: First Record of Bacteria in the Human Mouth
  He made his most famous bacterial observations using scrapings from his own teeth, illustrating different shapes (rods, spheres, spirals) of what we now recognize as bacteria.
• 1723: Continued Research Until Death
  He continued sending letters to London until the weeks before his death at age 90, even documenting the symptoms of his own rare disease.