Bacteria

1
Bacteria
2
BACTERIA
Food
soil
WHERE
Everywhere--gt
water
your BODY!
AGE
...probably the oldest life form on Earth
fossil bacteria found in rocks 3.5
billion years old!
DESCRIPTION
single-celled organism
kingdom MONERA...
which are single-celled critters WITHOUT A
NUCLEUS
3
MORE BACTERIA!
CLASSIFIED by SHAPE
COCCUS
(round)
4
CLASSIFIED by SHAPE -continued
SPIRILLUM
(spiral)
5
CLASSIFIED by SHAPE -continued some more!
Bacillus
(rod)
6
usually form COLONIES, or GROUPS.
These three shapes...
DIPLO (pairs)
7
Colonies, continued...
STREPTO (chains)
8
Colonies, continued...
STAPHYLO (clusters)
9
Dont mouth off at staph infections!
10
Colonies, continued...
TETRA (groups of four)
11
BACTERIA Names...
given by the COLONY PREFIX and the SHAPE SUFFIX
Examples
STREPTOCOCCUS
round
chains
COCCUS

STREPTO
chains of round bacteria
12
BACTERIA Survival...
--gt Most bacteria obtain food from other living
things.
(like us)
--gt some eat dead things
-DECOMPOSERS
--gt some are PARASITES
-. 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.
13
Other Helpful BACTERIA
--gtFOOD PREPARATION
I meanYogurt!
butter
cheese
fermentation
14
Harmful BACTERIA
FOOD SPOILAGE
--gt botulism (Clostridium botulinum)
Salmonella
E. coli
found in beef--gt
15
Controlling the growth of BACTERIA
How to limit BACTERIA REPRODUCTION
Louis Pasteur
TEMPERATURE (Pasteurization)
heat kills bacteria
boil steam
CHEMICALS
Bleach iodine
16
Controlling the growth of BACTERIA (more!)
MOISTURE
No water, no bacteria!
RADIATION
use of radiation to zap bacteria!