Introduction to Microbiology. Microbiology Study of microscopic (living ) things E.g. viruses, bacteria, algae, protists, fungi.

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Presentation transcript:

Introduction to Microbiology

Microbiology Study of microscopic (living ) things E.g. viruses, bacteria, algae, protists, fungi

History of Microbiology 1590 – First compound light microscope Zacharias Janssen

History 1676 –first observation of bacteria “animalcules” Anton Von Leeuwenhoek

History 1796 – First vaccine (smallpox) Edward Jenner

History 1857 – Germ Theory of Disease Louis Pasteur

History 1867 Antiseptic Surgery Joseph Lister

History 1884 Koch’s Postulates of Disease Transmission Robert Koch

History Vaccine against Rabies Louis Pasteur

History 1929 Discovery of Penicillin (first antibiotic) Alexander Fleming

History 1938 – First Electron Microscope The electron microscope is capable of magnifying biological specimens up to one million times. These computer enhanced images of 1. smallpox, 2. herpes simplex, and 3. mumps are magnified, respectively, 150,000, 150,000 and 90,000 times.

History 1953 Structure of DNA Revealed Watson & Crick

History 1954 Polio Vaccine Jonas Salk

Recent History Genetic engineering Cloning Human Genome Project Biotechnology Who knows what is next?

Sizes of Microbes Virus - 10 →1000 nanometers * Bacteria → 5 micrometers ** (Human eye ) can see.1 mm (1 x m) * One billionth or 1 x m ** One millionth or 1 x m

Tools of Microbiology Compound light Microscope - live specimens - 1,000 mag. or less Electron Microscope - non-living specimens - > 1,000 X mag. Incubator – keep microbes warm for growth

Techniques of Microbiology Staining – to better see structures Microbial Culture - growing the wee beasties Container for microbe culture - usually Petri dish Culture media - Food for the microbes - E.g. Agar – (from red algae) - Others such as nutrient broths

Pure Culture Techniques 1.Inoculation 2.Isolation 3.Identification