Chapter_1_lecture_outline - Chapter 1 Microbial Life Origin...

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Chapter 1: Microbial Life: Origin and Discovery What Is a Microbe? 6 major groups studied by microbiologists Prokaryotes 1. 2. Eukaryotes 1. 2. 3. Viruses Microbes Shape Human History Microbes affect food availability Microbial diseases change history Discovery of Microbes Light microscope invented in Mid-1600s: Antoni van Leeuwenhoek -1676 Built Described Published first drawings of Microbes Are Living Organisms Microbes arise only No 1861: Pasteur shows that microbes do not grow in liquid until introduced from outside Spontaneous generation -idea that
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He disproved this using broth in Sterilized broth by boiling, bent necks of flasks so that led to development of methods for controlling growth of microorganisms Pasteurization – use of Vaccines for anthrax, fowl cholera, rabies Germ Theory of Disease Observations: Germs can Hypothesis: Can germs infect and grow That is, do germs Hypothesis is testable: Are germs found in infected tissue?
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