Transcript microbes cause disease!!

MICROBES CAUSE
DISEASE!!
Messana
Science 8
MICROBES
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= Microorganism, Microscopic Organism
_______________
_______________
_______________
_______________
_______________
Found _________________...water, surface of
living things, inside living organisms
DISEASE
• Caused by a __________entering a place in
the body where they_____________________
• Organism experiences ___________function
• Show _______________= your body’s
response to disease (fever, vomiting, joint
pain, skin condition, etc.)
• Can be _____________________________or
_____________________________________
BACTERIA
E. Coli O157:H7 can
make you very sick.
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Single celled organisms – _________
Very small, Need microscope to see
**________________
Can be found on most materials and
surfaces – Soil, Water, Air, etc.
• Billions on your _________and in
your body’s _____________track
right now!
Harmless bacteria on
the stomach lining
Streptococcus can
cause strep
throat.
BACTERIA
• Different shapes =_______________________
• Have cell membrane, cell wall, &___________
• Cytoplasm contains _________material
floating _________+ ribosomes
(_________________or other organelles)
• Has ____________________& pili
• Can move, reproduce, eat, etc.
Typical Bacterial Cell
Helpful vs. Harmful Bacteria
• Harmful Bacteria = Germs, _______________
– Cause disease by ___________________into body
– Toxins are the _________________ from bacteria
– Bacterial infections  fever, swelling, rash
– Treat with___________________!
• Helpful Bacteria:
– Eat other ____________substances
– Help plants and animals __________________to
be used by organism
– ____________ food in your stomach
Clean skin has about 20 million
bacteria per square inch
Viruses
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VERY small!
Contains protein coat =________
Contains ______ or ______
NOT A ____________ CELL!!
_________ reproduce, eat, move, or maintain
homeostasis
• Try to get inside ______________to reproduce
• Must fit cell membrane like “________________”
Virus Replication
• If virus finds suitable living host
cell…
– DNA or RNA directs host cell
to _________________of
virus particle
– Copies of virus cause host cell
to____________________!
– Viruses go on to
_________________cells
Virus invading Bacterial Cell
Viruses
• Shaped life on Earth
• Cause ____________in plants & animals
• Affected _______________by
redistributing genes
• Can protect organisms from
environmental contaminants
• __________________viral infections
with anything – have to ______________
Parasites
• An organism that has a _____________
relationship with a _________organism
• Parasite lives _______or ______ the host
• Slowly __________or _______host _________
• EX:______________, bacteria,
ticks,_________________, heartworm, mites,
fleas, athlete’s foot, fungi, invertebrate insects
• Are you ready for these pictures!?
Parasites
Fish Parasite & Blood Parasite