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micro_midterms (1)and(2).doc

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Franco Pagotto

QUESTIONS FOR MIDTERM 1 1. Which of the following is visible with the naked eye, unassisted by magnification? A bacterial colony 2. Which of the following is the correct order for the solutions used in Gram staining? 3. If the Safranin step were omitted in the Gram staining procedure, what colour would you expect Gram positive bacteria to stain and what colour would you expect Gram- Negative tobne 4. Which of the following factors are responsible for preventing microbial growth on the skin? 5. Resident flora can be found in all the following locations in the human body EXCEPT the: 6.In which of the following anatomical locations would you expect to find the largest number of bacteria 7. Which of the following statements is FALSE? 8. In order to cause an infectious disease a pathogen must accomplish which of the following steps? 9. Which of the following is the best description of microorganisms taht cause spoilage of foods at refrigeration temperatures? 10. media designed to promote the growth of a specific kind of bacteria and suppress the growth of unwanted bacteria are called? 11. Which of the following is the correct written scientific name of the microorganism that causes step throat? 12. Antigens are: 13. Antibodies are produced by: 14. The following infections are all caused by steptococcus pyogenes EXCEPT for: 15. Toxic Shock syndrome is caused by: 16. Neisseria gonorrhoeae is: 17. The following structure may help a microorganism colonize a given body surface: 18. Which of the folowing is NOT an example if active immunization 19. A feature resulting in increase virulence of a bacterium is: 20. The most common infection caused by beta haemolytic streptococcus is: 21. Endotoxins: 22. An opportunisitc microorganism is: 23. An example of an opportunistic pathogen is: 24.Which of the following is an example of specific immunity against infection: 25. Which of the following statements is FALSE? 26. Which of the following is true about the normal flora of the nervous system 27. The most common route of infection with Streptococcus agalactiae is through 28. Cocci bacteria that divide in two or 29.A feature used for lab diagnosis of streptococci is: 30. Which is NOT produced by staphylococcus aureus? 31. Whcih of the following are gram positive diplococci? 32. Which of the following statements is INCORRECT? 33. A microorganism that can only grow in the complete absence of free oxygen is a(n) 34. Which of the following pathogens cases meningitis in young infacnts 1-12 weeks after birth? 35. What is the most common entry route of a microbial pathogen into the human body? 36. Which of the following is NOT a mechanism of acquired antibiotic resistance? 37. Which of the following vaccine types is considered to be generally the safest: 38. Which of the following is FALSE about the Gram negaitve cell wall? 39. Each of the following statements regarding steptococci is correct EXCEPT: 40. Which disease below is currently limited to small number of sporadic cases by vaccination of the general population? ANSWERS FOR MIDTERM ONE 1. 2. 3. Gram positive is purple and gram negative is colourless 4. 2&3. Dryness of skin and inhibitory substances. 5. CSF 6. Large intestine. 7. Normal flora bacteria never cause infections. 8. It must infect the host and it might multiply in the host. 9. Psychrophiles 10. Selective media 11. Streptococcus pyogenes 12. Any substance capable of inducing a specific immune response 13. B lymphocytes 14. Diphtheria 15. Staphylococcus aureus 16. A cause of genital infection 17. Pili 18. IgG of the animal origin 19. being able to invade tissues and to multiply 20, phryngitis/ tonsillitis 21. are usually less toxic than exotoxins 22. Usually non pathogenic 23. Staphylococcus epidermis 24. Lysis by killer t.cells 25. E-coli is a non lactose fermenter bacterium. 26. The nervous system 27. Contact with the female genital tract. 28. 29. They are usually arranged in pairs or in chains. 30. Hyaluro
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