1. MICROBES CAUSE DISEASE!!
Messana
Science 8

2. MICROBES = Microorganism, Microscopic Organism _______________
Found _________________...water, surface of living things, inside living organisms

3. 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 _____________________________________

4. Harmless bacteria on the stomach lining
E. Coli O157:H7 can make you very sick.
BACTERIA
Harmless bacteria on the stomach lining
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!
Streptococcus can cause strep throat.

5. BACTERIA Different shapes =_______________________
Have cell membrane, cell wall, &___________
Cytoplasm contains _________material floating _________+ ribosomes (_________________or other organelles)
Has ____________________& pili
Can move, reproduce, eat, etc.

6. Typical Bacterial Cell

7. 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

8. Clean skin has about 20 million bacteria per square inch

9. Viruses 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 “________________”

10. 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

11. Virus invading Bacterial Cell

12. 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 ______________

13. 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!?

14. Parasites

15. Fish Parasite & Blood Parasite