Microsoft PowerPoint - Importance of Microbiology -...

Microsoft PowerPoint - Importance of Microbiology
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Unformatted text preview: Importance of Microbiology By By S. M. S. M. Rafigh Rafigh 2011 2011 What is a Microbe Smaller than 0.1mm Includes bugs, things, germs, viruses, protozoan, bacteria, animalcules, small ckers suckers Nomenclature Carolus Linnaeus (1735) Genus species By custom once mentioned can be abbreviated with initial of genus followed by specific epithet. E. coli When two organisms share a common genus are related. Why study Microbiology Microbes are related to all life. In all environments Many beneficial aspects elated to life processes (food web, nutrient Related to life processes (food web, nutrient cycling) Only a minority are pathogenic. Most of our problems are caused by microbes EIDs Emerging infectious diseases Weapons of mass destruction New evolutionary features esponse to man encroaching on the environment Response to man encroaching on the environment Can you name an example? Microbes in research 10 trillion human cells 10x this number microbes Easy to grow Biochemistry is essentially the same Simple and easy to study Biotechnology Use of biological systems to produce useful items The use of biological information to make ings or improve the human condition things or improve the human condition Diversity of Microbes Bacteria-single celled prokaryotes Protozoa-eukaryotic, single celled, colonial, many ways of nutrition Fungi- absorb nutrients, single celled filamentous Viruses-acellular entities Others- worms, insects Bacteria Prokaryotes Peptidoglycan cell walls Binary fission For energy, use organic chemicals, inorganic chemicals, or photosynthesis Figure 1.1a Archaea: Prokaryotic Lack peptidoglycan Live in extreme environments Include: Methanogens Extreme halophiles Extreme thermophiles Halobacteria not om book Fungi Eukaryotes Chitin cell walls Use organic chemicals for energy Molds and mushrooms are multicellular consisting of masses of mycelia , which are composed of filaments called hyphae Yeasts are unicellular Figure 1.1b Protozoa Eukaryotes Absorb or ingest organic chemicals May be motile via pseudopods, cilia, or flagella Most free some parasites Figure 1.1c Algae...
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