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Anton Van Leeuwenhoek was a Dutch scientist who was best known for 

his development and improvement of the microscope and his 

contribution towards the study of microbiology. He was the first person 

to observe single celled organisms, which are now known as 

microorganisms. He also was the first person to observe muscle fibres, 

bacteria, blood flow in small blood vessels, and spermatozoa. In 1675, 

he discovered the differences in red blood cells in humans, fish, birds, 

and swine. His interest in microscopes and understanding of glass 

processing lead to his future important discoveries.

Anton Van Leeuwenhoek was a very unique 

scientist. He is known as “the Father of 

Microbiology” because he achieved in making 

some of the most important discoveries in biology. 

He was inspired by the glasses used by drapers 

allowing him to understand how to grind lenses, 

make microscopes, and to make observations.

Anton Van Leeuwenhoek first produced microscopes that were capable of seeing 

single cells and magnifications up to two hundred times. His instruments were made 

up of simple magnifying glasses, unlike the compound lenses which have more than 

one lens. The design of his microscope is very simple, it only uses a single lens on 

top of a tiny hole that is located in a brass plate. The instrument was only four inches 

long and had to be held up close to the eye, which required good lighting and 

patience.

Anton van leeuwenhoek discovered many things. One of these things 

was bacteria. In 1676, Anton was the first person to see bacteria. With 

those he sent of his drawing and data to the Royal society in London. 

After this he began to discover more things. In September 7, 1674 

Anton began to do observations in lake water. Through this Anton was 

the discovered green charophyte algae.  

Anton Van Leeuwenhoek was the first to look at single-celled organism. 

At first these organisms were known as   animalcules, now they are 

known as microorganisms. With this he discovered that these 

microorganism can be useful.   This organism is powerful enough to 

work with life-saving medicine. 

Leeuwenhoek was a devoted hard working man. When he was 

dying people sent him over 560 letters wondering about different 

observations.   He sent letters back full of his observations to 

London.   All together Anton has accomplished many things from 

the microscope to discovering organism.  

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