Bacteria

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Bacteria
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BACTERIA
Food
soil
WHERE
Everywhere--gt
water
your BODY!
AGE
...probably the oldest form of life
fossil bacteria found in rocks 3.5
billion years old!
DESCRIPTION
single-celled organism
kingdom MONERA
Prokaryotes--no nucleus
All have a cell wall
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MORE BACTERIA!
CLASSIFIED by SHAPE
COCCUS
(round)
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CLASSIFIED by SHAPE -continued
SPIRILLUM
(spiral)
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CLASSIFIED by SHAPE -continued some more!
Bacillus
(rod)
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usually form COLONIES, or GROUPS.
These three shapes...
DIPLO (pairs)
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Colonies, continued...
STREPTO (chains)
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Colonies, continued...
STAPHYLO (clusters)
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Colonies, continued...
TETRA (groups of four)
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BACTERIA Names...
given by the COLONY PREFIX and the SHAPE SUFFIX
Examples
STREPTOCOCCUS
round
chains
COCCUS

STREPTO
chains of round bacteria
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BACTERIA Survival...
--gt Most bacteria obtain food from other living
things.
(like us)
--gt some eat dead things
-DECOMPOSERS
--gt some are PARASITES
-they live off other living things
these may cause DISEASE
or may actually HELP the host!
--gt Example of helping Bacteria Bacteria in
your intestine helps with digestion and produces
vitamin K.
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Other Helpful BACTERIA
--gtFOOD PREPARATION
I meanYogurt!
butter
cheese
Fermentation--sauerkraut
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Harmful BACTERIA
FOOD SPOILAGE
--gt botulism (Clostridium botulinum)
Salmonella
E. coli
found in beef--gt
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Controlling the growth of BACTERIA
How to limit BACTERIA REPRODUCTION
Louis Pasteur
TEMPERATURE (Pasteurization)
heat kills bacteria
boil steam
CHEMICALS
Bleach iodine
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Controlling the growth of BACTERIA (more!)
MOISTURE
No water, no bacteria!
RADIATION
use of radiation to zap bacteria!