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Definition
- used in a manner that emphasizes the disagreeable reputation of microorganisms or microbes |
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- in health sciences it is just these disease producing microbes that we are concerned w/ - specifically the treatment and prevention of the diseases they cause BUT <1% and 99% |
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How microbes help maintain the balance of nature |
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Definition
- photosynthetic
- food and oxygen-generating that is critical to life on Earth
- intestines for digestion; synthesis of some vitamins
- food
- produce vinegar, sauerkraut, pickles, alcohol, green olives, soy sauce, buttermilk, etc
- decompose to give
- fix N2
- mutual symbionts
- protect against disease (LAB)
- genetic engineering |
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Definition
- bacteria (primary focus)
- archaea
- fungi
- protozoa
- viruses
- multicellular animal parasites
- algae |
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Term
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Definition
1. archaea
- prokaryotic (cell type)
- varies in composition; no peptidoglycan (cell wall)
- composed of branched carbon chains attached to glycerol by either linkage (membrane lipids)
- methionine (1st a.a. in protein synthesis)
- no antibiotic sensitivity
- lacking in rRNA loop and common arm of tRNA
2. bacteria
- prokaryotic (cell type)
- contains peptidoglycan (cell wall)
- composed of straight carbon chains attached to glycerol by either linkage (membrane lipids)
- formylmethionine (1st a.a. in protein synthesis)
- antibiotic sensitivity present
- rRNA loop and common arm of tRNA present
3. eukarya (eukaryotes) fungi
- eukaryotic (cell type)
- varies in composition; contains carbohydrates (cell wall)
- composed of straight carbon chains attached to glycerol by either linkage (membrane lipids)
- methionine (1st a.a. in protein synthesis)
- no antibiotic sensitivity
- lacking in rRNA loop
- common arm of tRNA present |
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Term
Characteristic differences of the 3 domains of life |
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Definition
1. archaea
- no nuclear envelope
- no membrane-enclosed organelles
- no peptidoglycan in cell wall
- some species are able to grow at temp. >100 d C
2. bacteria
- no nuclear envelope
- no membrane-enclosed organelles
- peptidoglycan in cell wall present
- not able to grow at temp. >100 deg celcius
3. eukarya (fungi, plantae, protozoa, algae)
- nuclear envelope present
- membrane-enclosed organelles present
- no peptidoglycan in cell wall
- not able to grow at temp. >100 d C |
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Definition
- no peptidoglycan in cell walls
- found in extreme environments but not always
- salt pans
- hot springs
- low pH areas |
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Definition
- tolerate or require high salt
- colour due to bacteriorhodopsin
- a photosynthetic pigment similar to rhodopsin in humans
- type of archae |
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Definition
- are heat loving
- yellowstone hot springs ex: pyrodictium tolerates 105 C |
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Definition
- produce methane by reducing CO2 (electrons fr. 4 H2)
- Nevada hot springs
- methanogens are strict anaerobes |
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Definition
- range fr. large multicellular types such as kelp (Ulva) - the large green, red and brown "leafy" things you would see on the sea shore to unicellular such as small, microscopic single cell organisms
- 7 has cellulose in cell walls
- abundant in moist/wet areas (produce, symbionts)
* photosynthetic eukaryotes w/a wide variety of shapes and both sexual and asexual reproductive forms
* unicellular composed of carbohydrates cell walls or cellulose
* produce O2 and carbohydrates utilized by other organisms
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Term
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Definition
- unicellular algae
- Pfiesteria causes massive fish death along Atlantic coast
- also cause illness via toxins
- ex: Gymnodinium
- fish stop breathing
- humans irritates eyes & respiratory system
- ex: Alexandrium & Gonyaulax
- produce neurotoxin called saxitoxin
- all of these taxa form "blooms" (red tide) under certain conditions |
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Term
Symptoms of Dinoflagellate toxins |
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Definition
- 10 to 30 mins after ingestion
- nausea, vomiting, diarrhea, abdominal pain, and tingling or burning lips, gums, tongue, face, neck, arms, legs and toes
- shortness of breath, dry mouth, a choking feeling, confused or slurred speech, and lack of coordination are also possible |
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Term
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Definition
- Diatoms
- unicellular algae
- green algae: Clamydomonas, caulerpa: thallus 1 cell |
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Definition
- first report of neurological disease in Canada in 1987
- neurotoxin
- affected people who ate mussels
- diarrhea, memory loss |
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Definition
- for vaginal dilation
- others for Kombu or algin
- Laminaria japonica |
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Term
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Definition
- dulse = edible
- porphyra = nori (for sushi)
- some source of carrageenan, agar
- some poisonous |
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Definition
- 1655, beginning of cell theory w/ large eukaryotic cells
- theory that all living things are composed of cells |
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Definition
- 1632-1723
- first to observe smaller cells - 1673
- 1676 discovered bacteria |
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Definition
- proposed by a german zoologist named Theodore Schwann
- states that all living things are made up of cells |
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Where do cells come from? (microbes) |
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Definition
- Francesco Redi (1668)
- sealed vs. non-sealed then gauze jars
- John Needham (1745)
- heat nutrient fluids, pour, cover - then organisms
- reproduction of animalcules
- Lazzaro Spallanzani (1765)
- cover, heat, no organisms
- criticism: vital force stop by cover and heat
- Lavoisier
- showed life needs O2
- Virchow (1858)
- biogenesis
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Term
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Definition
- demonstrated that spoilage was not due to spontaneous generation of microbes, but due to contamination by microbes present in the air |
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Definition
- to regenerate an organism that exists today
- to consider the very beginning of life |
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Definition
- Pasteur heated the wine at 56 C for 30mins
- killed bacteria but not the yeast
- still used today to:
- reduce spoilage
- increase shelf life
- kill potentially harmful bacteria |
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Term
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Definition
- demonstrated the link bet a specific germ and a specific disease
- noticed bacteria in the blood of cattle w/ anthrax - postulated bacteria may be cause of anthrax (cutaneous, GI, respiratory)
- validated the germ theory of disease
- established steps to prove certain microbes cause certain diseases
- introduced staining techniques for microscopy |
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Definition
- improved staining techniques
- introduced differential staining - more accurate identification of bacteria |
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Definition
- isolated the chemical w/c killed the bacteria: PENICILLIN
- named after the fungus: Penicillium chrysogenum |
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Term
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Definition
- single-celled, no nuclear memb., prokaryotic
- enclosed in cell walls composed of carbohydrate and protein called peptidoglycan
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Term
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Definition
- prokaryotic, no peptidoglycan
- found in extreme environments
- divided into 3 main gr.
- methanogens: produce methane as a waste product fr. respiration
- halophiles: salt loving; live in salty environment such as great salt lake and the dead sea
- thermophiles: live in hot sulfurous water such as hot springs at yellowstone national park
- not known to cause disease in humans
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Term
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Definition
- eukaryotic; cells have a distinct nucleus containing the cell's genetic material (DNA)
- surrounded by nuclear memb.
- unicellular or multicellular
- multicellular: mushrooms
- unicellular: yeasts
- can reproduce sexually or asexually |
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Term
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Definition
- dinoflagella toxins:
- fish stop breathing
- humans irritates eyes & respiratory system
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- a hypothetical process in which many scientists believed that some forms of life could arise spontaneously from nonliving matter |
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Definition
- claim that living cells can arise only fr. preexisting living cells |
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- prevent contamination by unwanted microorganisms w/c are now the standard practice in laboratory and many medical procedures |
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