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SNC4M Pathogens and Disease Unit Date: ____________ Name:_________________ Microviewer/Microscope Lab : Bacteria, Viruses and the Immune System /14KU, /6C, /5A Total /25 PART I: Using a Microviewer (remember to insert the slide from right to left): 1. Set 19: Helpful Bacteria ( /6KU) a) Looking at slide #6 of vinegar bacteria, what shape of the three types of bacterial shapes that you know about are these bacteria? _____________________ b) How are these bacteria useful to humans?_____________________________ _____________________________________________________________________ _____________________________________________________________________ c) Looking at slide #7 : Draw what you see in the circle below and label the cells. Can you think of other foods where bacteria are useful? Name two. _________________________________________________________________ SNC4M 2. Set 20: Harmful Bacteria ( Pathogens and Disease Unit /4KU, /3A) a) Looking at slide #2, what do you think the structures are that are coming out from the bacteria? ___________________________________________________________________ b) What would these structures be used for?________________________________________________________________ ___________________________________________________________________ f) Look at slide #6. This is Clostridium botulinum, the bacteria that cause botulism – a very severe and deadly type of food poisoning. The botulinum toxin is one of the deadliest toxins known. Draw what you see in the microviewer. The round structures are spores. Label your diagram. g) Why are spores useful for bacteria? ______________________________________________________________________ ______________________________________________________________________ h) How could you prevent food poisoning like botulism? ______________________________________________________________________ ______________________________________________________________________ SNC4M Set 240: Human Disease ( Pathogens and Disease Unit /4KU, /2A) a) Look at slide #2. The cells on the right are those that cause tuberculosis. What organ do these bacteria most commonly infect? ___________________________________________________________________ b) What conditions favour the development of tuberculosis? (remember the video on the Russian prison) ______________________________________________________________________ ______________________________________________________________________ c) Tuberculosis was close to eradication at one point. Why is it on its way back? ______________________________________________________________________ ______________________________________________________________________ PART II: Using a Microscope: Bacteria Types ( /6C) Remember how to set up a microscope. You place the slide on the stage, start on low power and move to higher power, which is adjusted only with the fine adjustment knob. Draw the three different shapes of bacteria that you see and label them with the names for those shapes. The spirillium slide only has one type while the other slides (3 types) show all three.