Micro-01-Intro - Introduction Microbiology: Study of...

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Introduction
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Microbiology: • Study of microscopic organisms • Microorganisms : organisms too small to be seen with the unaided eye
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Types of Microorganisms • Bacteria • Fungi • Protists • Helminths • Viruses
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Microorganisms Figure 1.1
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Bacteria (Prokaryotes) • Small • Unicellular • No nucleus or other membrane-bound organelles • Simple morphologies • Synthesizers or absorbers • Most are benign • Beneficial to ecosystems or to individual organisms Figure 1.1a
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Algae (Eukaryotes) • Unicellular and multicellular • Mostly aquatic • Photosynthetic • Typically are beneficial • Only a few cause human disease Figure 1.1d
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Protozoans (Eukaryotes) • Unicellular • Aquatic • Mostly engulfers • Some absorbers and photosynthesizers • Absorbers are parasitic and cause disease Figure 1.1c
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Fungi (Eukaryotes) • Unicellular and multicellular • Terrestrial • Nutrient absorbers • Decomposers • Unicellular - yeasts • Multicellular - molds • Many cause diseases Figure 1.1b
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Helminths (Eukaryotic) • Parasitic flatworms and round worms • Multicellular animals • Have microscopic stages in their life cycles • Can cause infectious disease Figure 12.28a
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Viruses • Acellular • Obligate intracellular parasites • Much smaller than cellular organisms • Cause disease Figure 1.1e
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This note was uploaded on 09/06/2009 for the course BIOLOGY 00 taught by Professor Anetadrazkiewicz during the Spring '09 term at Miss. College.

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Micro-01-Intro - Introduction Microbiology: Study of...

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