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Helpful and Harmful Bacteria Lab Purpose: To observe examples of various types of bacteria and to learn more information about their relationships with other organisms. Part 1: Harmful Bacteria – Use microviewers and slide set #20. 1. Who is responsible for introducing the science of bacteriology? 2. View Slide 1 – Diphtheria a. Describe the shape b. How do the bacteria cause disease? c. How is diphtheria prevented? 3. View Slide 2 – Typhoid Fever a. Describe the structure of this bacterium b. How is this disease transmitted? c. How can typhoid fever be prevented? 4. View Slide 3 – Pneumonia a. Why are pneumonia bacteria particularly harmful? 5. View Slide 4 – Tuberculosis a. Describe the structure of the bacterium 6. View Slide 5 – Blood Poisoning Bacteria a. Describe the shape and structure of this bacterium b. What does the term “streptococci” mean? c. How is the infection being controlled? 7. View Slide 6 – Food Poisoning Bacteria a. What is this type of food poisoning called b. How do these bacteria cause a problem? 8. View Slide 7 and Slide 8 and then look carefully at the diagrams that you have been provided with. Notice how the bacteria are similar and different. Part 2: Helpful Bacteria – Use microviewers and slide set #19 1. What is a culture? 2. View Slide 1 – Bacteria of Decay a. Why are these bacteria so important to life on earth? 3. View Slide 2 – Bacteria of Fermentation a. What is fermentation? b. Where is this process useful? 4. View Slide 3 – Nitrogen – Fixing Bacteria a. What doe these bacteria do for plants? 5. View Slide 4 – Nitrogen – Fixing Bacteria (nodule) a. What is a nodule and where is it found? b. What do the bacteria in the nodule do for the plant? 6. View Slide 5 – Nitrogen – Fixing Bacteria (roots) a. What is a legume? Give several examples of legumes b. How is this relationship a partnership between the bacteria and the plant? 7. View Slide 7 – Cheese Bacteria and Slide 8 – Sour Milk Bacteria a. How is cheese made? How is yogurt made?