Microbology: Micro - “small”, bio - “life”, ology “study of” = the study of small life, so small that they are unable to be seen with the naked eye.

Microorganisms aka microbes are the must abundant organisms on earth; in numbers and range (about 5 million distinct ones), very diverse.

Types of Microorganisms
1. Bacteria (study of, is called bacteriology)

  • unicellular
  • Peptidoglycan(consists of sugars and amino acids) cell walls
  • reproduces by asexual binary fission
  • ex: E. coli, listeria, monocytogenes

2. Algae

  • Unicellular and Nulticellular (these are visible to the naked eye)
  • Cellulose cell walls
  • Uses photosynthesis for energy
  • As a result of photosynthesis, algae produces molecular oxygen and organic compounds which are important to nature
  • Ex: dinoflagellates (plankton)

3. Protozoa

  • unicellular
  • may move using pseudopods, cilia or flagella
  • often parasitic (parasites are organisms that lives on or in a host and is potentially harmful) but can live as a free entity
  • Can reproduce sexually or asexually
  • Ex: amoeba, paramecium, Cruptosporidium protozoa causes diarrhea

4. Fungi (mycology)

  • unicellular or multicellular
  • chitin(a chemical component) cell walls
  • ex: molds& mushrooms (multicellular),  yeasts (unicellular)

5. Viruses- nonliving (virology)

  • Technically not a living organism (because it’s not a real cell and cannot reproduce or survive on it’s own, it replicates only with a living host cell)
  • Can be seen by an electron microscope
  • Has a DNA or RNA genome
  • Genome is surrounded by a protein coat
  • Coat may be enclosed in a lipid envelope

6. Prions- nonliving

  • aka Proteinaceous infectious particle
  • prions are infectious misfolded proteins (contain no genetic material, and is nonliving)
  • Causes diseases known as transmissible spongiform encephalopathies (TSEs)
     = spondlike appearance of brain tissue and creates protein fibrils in brain tissue
  • Ex: bovine spongiform, encephalopathy in cattle, crapie in sheet, creutzfeldt-jacob disease

7. Helminths (parasitology)

  • Multicellular & have separate sexes
  • ranges in widely in microscopic sizes
  • Ex: pinworms, hookworms, blood flukes. Those worms you see on HOUSE? yeah, they’re called helminths.

8. Arthropods- vector for microorganisms

  • Vectors of microoganisms
  • Doesn’t cause diseases but it carries a disease causing organism = invertebrates than feed on blood or tissue fluids of a host
  • multicellular
  • Ex: mosquitoes, fleas, lice, flies, ticks, mites
  • Mosquitoes transfer the protozoan of malaria, and viruses like the west nile, and yellow fever. dammit mosquitoes.
  • Ticks transfer the bacteria that causes lyme disease and rock mountain spotted fever. i had to take the lyme disease pills once in case i caught it, they are giant. dnw.