FREE SCIENCE AND STUDY GAMES ABOUT

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FREE SCIENCE AND STUDY GAMES ABOUT

MICROBIOLOGY EXAM QUESTIONS

Actual Qs and Ans Expert-Verified Explanation

This Exam contains:

-Guarantee passing score -20 Questions and Answers -format set of multiple-choice -Expert-Verified Explanation Question 1: symbiosis that benefits both members:

Answer:

mutualism Question 2: infections that may result from the use of catheters are classified as:

Answer:

Iatrogenic infections

Question 3: Discuss health-care associated (nosocomial) infections (HIAs).

Answer:

HAIs are infections acquired as a result of treatment or working in healthcare facilities. These facilities serve sick people who are capable of shedding pathogens. Transmission of pathogens and the development of resistant strains are increasingly becomi Question 4: a flora found in the same location as the resident flora, but which remains only for a

given amount of time, is called a:

Answer:

transient flora

Question 5: a microorganism capable of causing disease is called a:

Answer:

pathogen Question 6: a vector that transmits pathogens and also serves as host for a part of the

pathogen's life cycle is a:

Answer:

biological vector Question 7: a worldwide epidemic is considered is a:

Answer:

pandemic disease Question 8: bacterial endotoxins are:

Answer:

components of the gram-negative cell wall

Question 9: Discuss Koch's postulates and their limitations.

Answer:

• Suspected pathogen must be present in every case of disease and absent in healthy individuals.

• Must be able to isolate pathogen from diseased host and grow it in pure culture outside of the host.

• The pathogen from the pure culture must cause th

Question 10: the symbolic relationship in which one of the organisms benefits and the other is

not harmed or helped is referred to as:

Answer:

commensalism Question 11: when a pathogen spreads from the original site to other tissues or organs it is

called:

Answer:

focal infection

Question 12: likely to be the most frequently used portal of entry:

Answer:

respiratory tract Question 13: Describe the necessary steps a microbe must take before it can cause infection and disease.

Answer:

Adhesion to host cells or tissue Colonization within tissues Invasion through the growth and spread of the organism Evasion of host defenses involves the ability to avoid the host immune response.Question 14: Describe how microbes of a normal flora in the human body can become opportunistic pathogens.

Answer:

Normal flora can become opportunistic pathogens if conditions suppress the immune system, there are changes in the balance of the normal flora, the normal flora enter into an area of the body they normally don't inhabit.Question 15: Describe the three basic approaches used by epidemiologists to study the dynamics of a disease in a population.

Answer:

Descriptive epidemiology-collecting and tabulating data concerning the disease.Analytical epidemiology-demonstrating cause and effect relationships using data from descriptive epidemiology.Experimental epidemiology-experimental testing of hypotheses r Question 16: the presence of microbes in or on the body is a:

Answer:

contamination Question 17: the mold that produces penicillin is an example of:

Answer:

amensalism

Question 18: the human body containing normal flora:

Answer:

urethra, vagina, and mouth Question 19: not considered a vehicle transmission:

Answer:

droplet Question 20: a disease that is generally present in a given population is:

Answer:

endemic