You might be wondering why anyone would want to look at bacteria through a microscope. 

After all, they are the little organisms that cause disease, right 

Actually, bacteria come in all shapes and sizes and not all of them are harmful. 

Actually, many types of bacteria are necessary for our survival.  

Scientists use microscopes to study bacteria to learn more about how these organisms live and how they interact with their environment. 

Seeing bacteria under a microscope can also be helpful in the diagnosis and treatment of diseases. 

For example, some types of bacteria can cause infections. 

By looking at the patient’s sample under a microscope,