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MICROBES CAUSE DISEASE!! Messana Science 8 MICROBES • • • • • • • = 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. • • • • 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 • • • • • 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