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quiz for exercises 22.23

quiz for exercises 22.23 - (sometimes described as Chinese...

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Review Questions for Microbiology Quiz You may need class notes and/or your text to answer some of the following. 1.Name two bacteria (Genus and species) that are normally found on the skin and list one characteristic of each. 2. Describe the coagulase test and a positive result. Name one organism (Genus and species) that is coagulase positive and one (Genus and species) that is normally found on the skin that is coagulase negative. 3. Why is your skin first treated with 70% ethanol when the normal flora is being studied? 4. What is the name of the medium designated as MSA? Describe the appearance of a positive result and what it means ? Which bacteria are inhibited by this medium ? 5. Which one of the following bacteria that can infect skin wounds would you expect to be oxidase positive ? Staphylococcus aureus, Staphylococcus epidermidis, Pseudomonas aeruginosa . What other type of organisms that can be found on the skin are oxidase positive ? 6. Which rod to club shaped organisms (Genus) that frequently grow in irregular groups
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Unformatted text preview: (sometimes described as Chinese letters) may be found on the skin ? 7. Name and distinguish between the two types of visible hemolysis that can be produced by Streptococci. (describe the media that is used and the appearance that identifies each type of hemolysis) 8. How is the catalase test performed? What is it testing? Describe a positive result. 9. Does the title of Fig. 22.1, p. 193 accurately apply to both sets of figures that are drawn below the title ? Explain. 11. When a laboratory isolates an organism and tests it for sensitivity to antibiotics, a control culture is always evaluated at the same time. If the insert provided with the antibiotic disc indicates that the zone of inhibition for the control culture is 15 Ð 23 mm. and you record a zone of 20 mm, what does that tell you about the control organism in relation to that antibiotic and in relation to the test conditions ?...
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