Ch._28_-_Study_Questions - 16. What is and LD50? 17. What...

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Biol 261 - Ch. 28 – Study Questions 1. What is normal flora? Give examples of the normal flora organisms. 2. What is a pathogen, opportunistic pathogen, virulence factors. Give examples. 3. What are infection, intoxication and disease? Give examples. 4. What type of organisms are found in dental plaque and how are they able to produce plaque? 5. What organisms are associated with dental caries and how do they produce cavities? 6. What type of organisms live in the stomach and why? 7. What do the bacteria that live in the gut do for us? 8. What type of organisms do you find in the upper and lower respiratory tracts? 9. What organisms live in the bladder? 10. Why are women more susceptible to bladder infections? 11. What organisms contribute to the acidity of the vagina? 12. What is the basic mechanism of pathogenesis? 13. Why do certain organisms only infect certain body sites? 14. What do bacteria use for attachment? 15. What are bacterial capsules made of?
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Unformatted text preview: 16. What is and LD50? 17. What virulence factor is associated with Strep pneumoniae? 18. How does an exotoxin differ from and endotoxin? Give examples of both. 19. What is the function of hyaluronidase and coagulase? 20. What are the three types of hemolysins? What do they do? Name and organism which is beta hemolytic? 21. How do the toxins associated with the following bacteria function? C. diptheriae, C. botulinum, C. tetani, V. cholera. What is the gram reaction and morphology of each of these organisms? 22. What is a superantigen? Name an organism associated with superantigens and the disease it results in. 23. What is an enterotoxin? 24. What test is used to test for endotoxins? Why would endotoxins potentially be present in a sterile solution? 25. What factors influence whether or not a host may become immunocompromised? 26. What are the natural defense mechanisms?...
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