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Virus vs. Bacteria! What's the difference? By the end of today's class you will be able to... Compare and contrast microbes: ·Size, shape, structure ·Whether they are living cells Virus Vs. Bacteria! NOTES! Viruses and Bacteria BOTH are microbes that have DNA Bacteria AND viruses BOTH can cause diseases! DIFFERENCES Cellular or Noncellular? Bacteria: Single cell Virus: NOT a CELL! http://www.brainpop.com/health/diseasesinjuriesandconditions/viruses/ DIFFERENCES Living or Non-living? Bacteria: Living! ·Can reproduce at very high rates ·Are found everywhere! Virus: NON-living! ·Viruses are not living cells…they can’t move, eat, or reproduce by themselv ·BUT, if a virus can get inside a living cell, it can reproduce! ·SO viruses are always trying to invade living cells! DIFFERENCES Structure? Bacteria: cell wall, cytoplasm, DNA (NOT in a nucleus!) Virus: Protein shell surrounding DNA DIFFERENCES Size? Bacteria: Very small, but bigger than virus Viruses! Bacteria! Virus: Very small, but smaller than bacteria DIFFERENCES Shape? Bacteria: sphere, rod-shaped, spiral Virus: round, rod, bullet Bacteria AND viruses can BOTH cause disea Diseases Bacteria! -food poisoning -Lyme disease -strep throat -pneumonia -tuberculosis -typhoid fever Virus! -influenza (the flu) -chicken pox -malaria -HIV/ AIDS -measles -common cold How do we treat the diseases? Bacteria! -Antibiotics -kills or slows the growth of the bacteria Virus! -Vaccines -we use vaccines to try to prevent us from getting the virus Using antimicrobial solutions ·Kills 99% of germs? ·What about that 1% of germs that lives? ·They are immune to the solution ·They reproduce more microbes that are immune to the solution ·So what do you end up with? A huge population of harmful microbes that are not affected by the antimicrobial solution! Are bacteria good or bad? ·They can be both! ·Bacteria cause diseases such as tuberculosis, food poisoning, Lyme disease. ·Others eat harmful materials and release good vitamins and nutrients. Case Studies! -Look and each picture and read the case study -In your notebook, answer the questions for each case study. Label each: Ex. "Case study 1" -You will have two minutes at each station! Which statement below correctly identifies the reason why viruses are not considered alive? A B C D They have DNA or RNA. They have a protein coat. They are really small. They can only reproduce inside cells How do bacteria not help humans? A B C D They cause diseases. They make food products. They help digest foods. They eat harmful microbes. What do viruses and bacteria have in common? A They both cause disease. B They are both living. C They are both harmful to the environment. D They are both a cell.