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Contents
8C Microbes and Disease
What are microbes?
Uses of microbes
How microbes cause disease
Fighting disease
Summary activities
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What are microbes?
Microbes are very small living
things and are sometimes
called
micro-organisms.
Microbes are so tiny that they
cannot be seen with the
naked eye. They can only be
seen using a microscope.
How many different microbes
can you name?
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Different types of microbes
There are three types of microbes:
microbes
bacteria viruses fungi
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Bacteria fact file
Bacteria e.g. Salmonella and Streptococcus
size: 1/1000 mm
shape: Bacteria can be spherical,
rod-shaped or comma-shaped.
structure: Bacteria are single-
celled organisms, which do not
completely have a nucleus.
Some cause disease, but many
are useful.
reproduction: Bacteria reproduce
very quickly. Two can very quickly
become four, then eight and so on.
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Bacterium structure
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