micro 205 study guides - Types of Microbes Bacteria:...

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Unformatted text preview: Types of Microbes Bacteria: -Unicellular, microscopic, forms colonies when large enough (they accumulate). -Prokaryotes (Prokaryote) they do not have a nucleus but do have DNA. -Majority of Bacteria do not cause diseases. EX: MRSA- Methicillin-resistant Staphylococcus aureus : Commonly transmitted in hospitals, can also be transmitted through sharing sports equipment. Resistant to a number of antibiotics. Protozoa: -Unicellular -No cell wall -Eukaryotes: Has nucleus (membrane encloses its DNA) -Majority do not cause disease EX: Amoeba proteus- A common protozoan. Parasitic worms: -Multi cellular animals (Eukaryote) -Animal not microbe. -Microscopic eggs and larva (immature forms). EX: Necator americanus : A hookworm. Vectors: -Vectors are arthropods insects that carry microbes or parasite larvae -Animal (Eukaryote) Not microbe. EX: Amblyomma americanum : lone star tick. Archaea: -Unicellular can form colonies when large enough. -Prokaryotes -Do not cause disease. -Live in extreme Environments very salty, no light, extreme pressure or temperature. EX: Haloferax : An Archaea that is also an extremophile. Vi rus: -All viruses are Obligate intracellular parasites; that is that they have to be inside host cells to reproduce or do anything else. -Smaller than the smallest cell. *- A-Cellular; this means that there is no cell structure to a virus.* -Nucleic acid (DNA or RNA) surrounded by protein. EX: H1N1 virus Algae: -Multicellular (seaweed or kelp) or Unicellular (Alexandrium). -Eukaryote -Photosynthetic -When disease causing its usually because its secreting neurotoxin. EX: Alexandrium : The Algae responsible for Red tides. Fungi: -Multicellular (molds, mushrooms) or Unicellular (Yeasts) -Eukaryote *-Not Photosynthetic* -Needs Moisture, but can tolerate dry environment. -Sacrophytes (Saprophyte)get nutrition from dead organic material, carbohydrates, proteins, lipids, nucleic acid. -Have cell walls EX: Trichophyton rubron : Athletes foot. Binomial Nomenclature -Classification scheme that assigns each organism a genus name and a species name. -The first part of the word is always upper case and the second part is always lower case. -The names are either italicized or underlined. Ex: Escherichia coli or Escherichia coli. Taxonomy -The Science of classifying and naming organisms. -Names of organisms change as new data becomes available. Ex: Streptococcus faecalis is now Enterococcus faecalis . 5 kingdoms 1.) Fungi 2.) Animal 3.) Plantae 4.) Protista 5.) Monera 3 Domains -Carl Woes grouped organisms by their ribosomal RNA sequences. -The result was 3 domains; 1.)Bacteria 2.)Archaea 3.)Eukarya -Ribosome: Organelle/ structure found in all cells, and is the site of protein synthesis....
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micro 205 study guides - Types of Microbes Bacteria:...

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