MCB 2289LMicro LearnSmart Module 7 quiz

1. When a large zone of no growth is found around an antibiotic disc being used for identification purposed, this generally means that the microbe is to the antibiotic 2. Identification of a bacterial species cannot be made on microscopic morphology alone because 3. A microorganisms that is most often harmless but may occasionally cause infection and disease if defenses are compromised is referred to as an opportunistic pathogen. 4. How do you determine the species of an unknown bacterium? 5. Which test uses a medium that is both selective and differential for members of the genus Staphylococcus? 6. Before attempting to identify an unknown bacterial species, the organism must be isolated in a pure culture. 7. Which test utilizes hydrogen peroxide and the observation of gas bubble formation when attempting to identify an unknown bacterium? 8. All of the following are methods that can be used to isolate bacteria from a mixed culture EXCEPT? 9. Impetigo, a type of inflammatory skin infection, is caused by 10. All of the following body sites normally have large numbers of resident microbiota EXCEPT? 11. The Gram stain is an example of a test that can be used to determine the characteristics of a bacterium? 12. The test involves using rabbit plasma as a reagent and its results are determined by observation of thickening of the medium. 13. All of the following infections are frequently cause by Staphylococcus and Streptococcus species EXCEPT? 14. The complete clearing or hemolysis that a bacterial isolate may produce on blood agar is called alpha hemolysis 15. Gram-positive cocci in chains would be called staphylococci. 16. Which of the following is a characteristic of members of the resident microbiota? 17. The field of study in which medicine and microbiology intersect is known as medical microbiology 18. Which of the following bacterial species would be most likely to grow in bile esculin medium and hydrolyze the esculin? 19. The absence of hemolysis on a blood agar plate is referred to as hemolysis 20. A bacterial isolate grown on a mannitol salt agar plate changes the pink agar to yellow and produces bright yellow colonies. This indicates that the isolate is for mannitol fermentation.