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Transcript 
Bacteria Structure
14th of June 2007
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Bacteria (singular: bacterium) are
unicellular microorganisms.
Bacterial Groups
1 – Coccus
Spherical shape
2 – Bacillus
Rod-shaped
3 – Spirillum
Spiral shape
4 – Vibrio
Curved shape
e.g Staphylococcus
aureus
Causes food poisoning
e.g Azotobacter
A nitrogen fixing
bacterium.
e.g Salmonella typhi
Causes typhoid fever.
e.g Spirillum rubrum
A saprotroph of fresh
water.
e.g Vibrio cholerae
Causes Cholera
Chromosomes
Pilus (fimbria)
flagellum
Capsule
cytoplasm
Cell wall
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