Introduction What do we know about Size animace Invisible with naked eye Structure Cells bacteria fungi protozoa Acellular particles viruses Where are microbes found Everywhere ID: 341851
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Slide1
Microbes
IntroductionSlide2
What do we know about?
Size?
(
animace
)
Invisible with naked eye
Structure?
Cells (bacteria, fungi, protozoa)
Acellular
particles (viruses)
Where are microbes found?
Everywhere:
water – soil – air - organismsSlide3
What‘s the difference?
Cell wall
Cell membrane
Cytoplasm
Chromozome (= DNA)
bacteria
yeast cellSlide4
Acellular organisms (= viruses)
Viruses are NOT free living –
they MUST live inside another living cell
The virus particle consist of
nucleic acid (DNA
or
RNA)
and
protein capside
Bacteriophage
– a virus which infects bacteria
Influenza
Herpes virus
HIV Slide5
What’s the difference?
Bacteria
Viruses
They need:
Good (but various) conditions for growth and reproduction.
Host cell that enables reproduction of virus.
(They cannot reproduce by themselves.)
The host cell produces many virus particles, it may completely destroy the host cell.
Nutriens (feed) and some bioelements from their environment
Suitable temperature.Slide6
Bacteria
They are very important as decomposers in all ecosystems.
Most are helpful or harmless, some cause disease. Bacteria can reproduce outside of the body or within the body as they cause infections.
They are found everywhere on earth, in the ocean, in rocks, in volcanoes, in our bodies and in the
soil
.Slide7
Viruses
Viruses are the smallest microbes.
They can infect people, animals, plants, fungi, bacteria.
Most viruses cause diseases.