INTRODUCTION TO MICROBIOLOGY Bacteria, Viruses, Fungi, Protozoa, Microorganisms & Health Reading Comprehension Passages. How can something invisible shape the entire world? Introduction to Microbiology takes students into the unseen universe of microorganisms, bacteria, viruses, fungi, and protozoa, and explores how these tiny life forms drive medicine, biotechnology, and the balance of ecosystems. From the discovery of the microscope to the fight against disease, this lesson reveals the power