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17 Cards in this Set
- Front
- Back
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Microorganism
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Any small organism seen with microscope
-Broad spectrum -Not taxanomic classification -Grouped by stucture,function and biochemical function |
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Virus
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-Smallest micro organism
-Needs host -Nucleic acid within protein coat -3 shapes=Iscosohedron (20 sides),helix,complex -Influenza,aids,hepatitis |
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Bacteria
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-100x larger than virus
-3 shapes=bacillus,coccus,spirillium +spirochete -Positive usually non pathogenic roles -Causes disease by digesting healthy cells,produce toxins,affect cell function |
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Cyanobacteria
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-Aquatic formely blue-green algae
-Photosynthetc pigments -2 forms =unicellular/multicellular -fresh and marine water |
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Algae
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-Possess colour pigments
- 2 types= Diatoms (oceanic food source),Dinoflagellates (cause red tides) |
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Protozoa
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Largest,complex structres
-Classified via locomotion=pseudopods (amoeba),flagella (flagellates),cilia (ciliates), sporozoans (move with environment)-mainly harmless |
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Fungi
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-Complex micro organisms
-2 groups=moulds (long,branching chains of cells-hyphae) Yeast=single celled -like acidic environment |
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Epidemiology
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-Study of populations of disease and factors that determine occurence
-Measurement of disease in populat. =detemine its importance/efficiency of control -Effects on production=decresed herd production,not single animal -Economic effects=study of individual farm to national level -Natural history |
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Epidemiology
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Studies of human pop.
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Epizootiology
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Studies in animal pop.
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Epidemics
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Outbreaks in human pop.
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Epizootics
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Outbreaks in animal pop.
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Epipornitics
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Outbreaks in avian pops.
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Zoonoses
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Disease shared by man and lower animal
-transfer mechanims should be considered |
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Bacillus
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-Club shaped
-STREPTO |
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Spherical
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-1 coccus/ +1 cocci
-pair= diplococci -chains = streptococci -clusters 4-8=sarcina -random clusters=staphylococci |
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Spiral
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-One turn=Vibrio
-Corkscrew=Spirillium -Spirillium=rigid cell wall and flagella -Spirochete=flexible wall/flagella -Axial filaments=move like snake |
