MICROBIOLOGY 101 INTERNET TEXT

CHAPTER EXTRA CREDIT QUIZES

UPDATED: 04/09/99

GLOSSARIES

MICROBIOLOGY |  CHEMISTRY | MEDICAL

TABLE OF CONTENTS

CHAPTER

1 |  2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | 13 | 14 | 15 | 16 | 17 | 18 | 19 | 20 | 21 |

RULES

1. The answers must be turned in before the lecture begins; i.e., no answers will be accepted after 2 PM the day of the lecture.
2. The answers must be sent to me by e-mail in a form that is easy to read. In most cases this will be a column of numbers with the answers beside the numbers.
3. The answers will be posted (below) on this page after the lecture on a chapter has begun. They will be removed after a few days.

CHAPTER 17 QUIZ

Those that get 25 or more correct get 4 extra points. See the correct answers after the STD lectures have begun.

1. All persons with STDs have obvious symptoms. T or F

2. Only people with visible or open STD sores are contagious. T or F

3. No vaccine exists for any STD. T or F.

4. Vaginal infections are inconvenient but not dangerous. T or F.

5. My child is not at risk of getting a STD before they enter college. T or F.

6. Washing for men and douching for women prevents STDs. T or F.

7. STDs are no worse than a bad cold. T or F.

8. How many people in America came down with an STD in 1995?:

A. 12 million
B. 2 million
C. 50 million

9. How many Americans carry some type of STD infection?

A. 100 million
B 15 million
C 55 million

10. How many people in the US are infected with genital herpes (GH)?

A. 31 million
B. 15 million
C. 150 million

11. How many new cases of genital herpes in the US were reported in 1995?

A. 5 million
B. 500,000
C. 50 million

12. How many people in the US were infected with chlamydia in the US in 1995?

A. 500,000
B. 50 million
C. 4 million

13. How many people in the US became infected with genital warts in 1995?

A. 50 million
B. 1 million
C. 10 million

14. What is the current cost per patient per year of AIDS treatment?

A. ~$20,000
B. ~$5,000
C. >$100,000

15. Annual cost in dollars of treating patients with AIDS and other STDs in the US:

A. 5 billion
B. 100 billion
C. 17 billion

16. What percentage of AIDS victims live in the developing world?

A. 25
B. 60
C. 90

17. The latest SUCCESSFUL treatment for AIDS involves a vaccine: True or False.

18. The number of people worldwide living with HIV/AIDS is estimated to be:

A. 31 million
B. 5 million
C. 100 million

19. The major mode of HIV transmission in the world is:

A. Homosexual sex, ~80%
B. Heterosexual sex, 70-75%
C. IV drug use, ~65%

20. World wide, homosexuals account for what percentage of HIV infections?

A. <2%
B. 5-10%
C. 85%

21. World wide, IV drug users account for what percentage of HIV infections?

A. 5-10%
B. 50%
C. 75%

22. In the US what percent of HIV transmission is by homosexual sex?

A. 99%
B. 90%
C. 51%

23. In the US what percent of HIV transmission is by heterosexual sex?

A. 8%
B. 45%
C. 25%

24. In the US what percent of HIV transmission is by IV drug users?

A. 10%
B. 55%
C. 25%

25. In the US what percentage of NEW HIV infections occurs in people under 25?

A. ~50%
B. ~10%
C. ~2%

26. The National Academy of Sciences recently made a study of the effects condom availability and school based education programs to prevent STDs and found the following:

A. That both these factors resulted in a significant increase in sexual activity of teenagers.
B. That both these factors resulted in a significant decrease in sexual activity of teenagers.
C. That both these factors resulted in no significant increase in sexual activity of teenagers.

27. By 1988 what percentage of Americans infected with HIV have died?

A. ~15%
B. ~90%
C. ~50%

28. In Burundi and Rwanda (Africa) what percent of pregnant women are HIV-positive?

A. 20%
B. 5%
C. 45%

29. Percent of deaths worldwide due to unsafe sex:

A.10%
B.0.05%
C. 2%

ANSWERS:

1. All persons with STDs have obvious symptoms. T or F; F: FACT: 80% don't even know they are infected.
2. Only people with visible or open STD sores are contagious. T or F; F: FACT: More than 2/3 of infections are spread by people with no identifiable symptoms
3. No vaccine exists for any STD. T or F; F: FACT: There is one for hepatitis B.
4. Vaginal infections are inconvenient but not dangerous. T or F; F: FACT: Infection can lead to infertility. In pregnant women infection can cause premature or low birth-weight babies.
5. My child is not at risk of getting a STD before they enter college. T or F; F: FACT: By the time they are 19, 85% of teenagers have had sex and 25% of those have had an STD.
6. Washing for men and douching for women prevents STDs. T or F; F: FACT: Neither is effective. Douching may drive the bacteria deeper into the genital tract.
7. STDs are no worse than a bad cold. T or F; F: FACT: STDs like syphilis, hepatitis C, herpes (new borns) & AIDS, kill. Two cause cancer. Four cause infertility in women (& to a lessor degree in men).
8. How many people in America came down with an STD in 1995?:
   • A. 12 million.
   • B. 2 million
   • C. 50 million
9. How many Americans carry some type of STD infection?
   • A. 100 million
   • B 15 million
   • C 55 million. Out of a population of ~270 million
10. How many people in the US are infected with genital herpes (GH)?
    • A. 31 million. There is no cure for this disease
    • B. 15 million
    • C. 150 million
11. How many new cases of GH in the US were reported in 1995?
    • A. 5 million
    • B. 500,000.
    • C. 50 million
12. How many people in the US were infected with chlamydia in the US in 1995? Whitman county has the highest rate of this STD in the state; sometimes it is not good to be NO. ONE.
    • A. 500,000.
    • B. 50 million
    • C. 4 million.
13. How many people in the US became infected with genital warts in 1995? Whitman county has the highest rate of this STD in the state.
    • A. 50 million
    • B. 1 million.
    • C. 10 million
14. What is the current cost per patient per year of AIDS treatment?
    • A. ~$20,000
    • B. ~$5,000
    • C. >$100,000, in the majority of cases the taxpayer pays these bills. 
15. Annual cost in dollars of treating patients with AIDS and other STDs in the US:
    • A. 5 billion
    • B. 100 billion
    • C. 17 billion, most of it paid by the taxpayer.
16. What percentage of AIDS victims live in the developing world?
    • A. 25
    • B. 60
    • C. 90 (7.5% of the African population is estimated to be infected)
17. The latest treatment for AIDS involves a vaccine: True or False. Scientists are working very hard on a vaccine as the current feeling is that only an effective vaccine can stop or control the HIV epidemic. Several possible vaccines are in the trial stage.
18. The number of people worldwide living with HIV/AIDS is estimated to be: There are ~31 million people in the world living with HIV/AIDS. I could find no data on an estimate of the actual number of AIDS cases, but the cumulative is estimated to be ~8.4, of which ~2 million are currently alive. 16,000 people per day become infected with HIV around the world.
    • A. 31 million (1997)
      B. 5 million
      C. 100 million
19. The major mode of HIV transmission in the world is:
    • A. Homosexual sex, ~80%
      B. Heterosexual sex, 70-75%
      C. IV drug use, ~65%
20. World wide, homosexuals account for what percentage of HIV infections?
    • A. <2%
      B. 5-10%
      C. 85%
21. World wide, IV drug users account for what percentage of HIV infections?
    • A. 5-10%
      B. 50%
      C. 75%
22. In the US what percent of HIV transmission is by homosexual sex?
    • A. 99%
      B. 90%
      C. 51%
23. In the US what percent of HIV transmission is by heterosexual sex?
    • A. 8%
      B. 45%
      C. 25%
24. In the US what percent of HIV transmission is by IV drug users?
    • A. 10%
      B. 55%
      C. 25%
25. In the US what percentage of NEW HIV infections occurs in people under 25?
    • A. ~50%
      B. ~10%
      C. ~2%
26. The National Academy of Sciences recently made a study of the effects condom availability and school based education programs to prevent STDs and found the following:
    • A. That both these factors resulted in a significant increase in sexual activity of teenagers.
      B. That both these factors resulted in a significant decrease in sexual activity of teenagers.
      C. That both these factors resulted in no significant increase in sexual activity of teenagers. One of the most persistent myths of our society is that sex education and condom availability turn teenagers into sex-machines (mother nature is the real culprit) nor does it cause a significant decline in sexual activity. However, all the scientific data I've seen indicates that sexual activity actually declines or remains the same. I'll give anyone 2 points who can bring me valid scientific data that indicates the opposite. A simple way to judge this is to answer the question "would this knowledge/availability (in high school) have made me more or less sexually active in those years?"
27. By 1988 what percentage of Americans infected with HIV have died? Parade Mag. 4/6/97
    • A. ~15%
      B. ~90%
      C. ~50%
28. In Burundi and Rwanda (Africa) what percent of pregnant women are HIV-positive?
• A. 20% A high percentage of their babies will be born with HIV.
  B. 5%
  C. 45%
29. Percent of deaths wirldwide due to unsafe sex:
    • A.10%
      B.0.05%
      C. 2%

How did you do? Don't feel bad if you didn't know the answers to these questions, as few people do. The larger concern is that you may someday have sex with someone who is unaware of the extent of the STD problem.