Microbiology And Decontamination

32 Questions

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Microbiology And Decontamination

It’s fair to say that the scariest organism as a person can come up against face-to-face is probably a shark or a bear, but sometimes you’ll find that the creatures you can’t see are often the most dangerous. In the following quiz on the study of microbiology, we’ll be taking a look at those such microorganisms and seeing if you know the facts about decontamination as well as you should.


Questions and Answers
  • 1. 
    About how many people die each year in the United States from hospital-acquired infections (HAIs)?
    • A. 

      90,000

    • B. 

      250,000

    • C. 

      5,000

    • D. 

      25,000

  • 2. 
    Approximately what percent of patients receiving mechanical ventilation develop pneumonia as a complication?
    • A. 

      15%

    • B. 

      25%

    • C. 

      1%

    • D. 

      10%

  • 3. 
    Which of the following is considered the primary source of infection in the health care setting?
    • A. 

      Medical equipment

    • B. 

      Humans

    • C. 

      Carpet

    • D. 

      Food and water

  • 4. 
    How do endotracheal tubes increase the risk of infection?
    • A. 

      By reducing neutrophil effectiveness

    • B. 

      Providing surfaces for biofilms to develop

    • C. 

      impeding local host defenses

    • D. 

      Both A and B

  • 5. 
    All of the following factors increase the risk of surgical patients for developing postoperative pneumonia except:
    • A. 

      History of smoking

    • B. 

      Prolonged intubation

    • C. 

      Obesity

    • D. 

      All the above

    • E. 

  • 6. 
    What is the most common route of pathogen transmission in the hospital setting?
    • A. 

      Airborne transmission

    • B. 

      Surgical transmission

    • C. 

      Indirect contact

    • D. 

      Droplet transmission

  • 7. 
    Which of the following is an example of indirect contact transmission involving fomites?
    • A. 

      Drinking tap water

    • B. 

      Inhaling tuberculosis pathogens in the emergency department

    • C. 

      Use of a sterile needle on a pneumonia patient

    • D. 

      Use of a dirty nebulizer on another patient

  • 8. 
    If you are caring for a patient who is suspected of having SARS, at what distance from the patient is it recommended to wear an effective filtration mask?
    • A. 

      12 feet

    • B. 

      15 feet

    • C. 

      10 feet

    • D. 

      6 feet

  • 9. 
    Which of the following diseases is transmitted primarily by airborne transmission?
    • A. 

      Smallpox

    • B. 

      All the above

    • C. 

      Tuberculosis

    • D. 

      Measles

  • 10. 
    • A. 

      Surveillance

    • B. 

      Immunization

    • C. 

      Chemoprophylaxis

    • D. 

      Both A and B

  • 11. 
    What vaccination does OSHA require hospital employers to provide?
    • A. 

      Hepatitis B

    • B. 

      Streptococcus pneumoniae

    • C. 

      Tuberculosis

    • D. 

      Smallpox

  • 12. 
    Exposure to which of the following organisms calls for postexposure chemoprophylaxis?
    • A. 

      B. anthracis

    • B. 

      N. meningitides

    • C. 

      B. pertussis

    • D. 

      All the above

    • E. 

  • 13. 
    What is the first step in equipment processing for reuse on another patient?
    • A. 

      Disinfecting the equipment

    • B. 

      Sterilizing the equipment

    • C. 

      Drying the equipment

    • D. 

      Cleaning the equipment

  • 14. 
    Which of the following statements is NOT true regarding the use of soaps to clean equipment?
    • A. 

      Soaps have good bactericidal activity.

    • B. 

      Soaps can help remove organic material.

    • C. 

      Soaps act by lowering the surface tension.

    • D. 

      Soaps work poorly in hard water.

  • 15. 
    What should be used to wipe down the surface of devices that cannot be immersed in water?
    • A. 

      Strong detergent

    • B. 

      Bleach

    • C. 

      70% ethyl alcohol

    • D. 

      Warm soapy water

  • 16. 
    Which of the following organisms is NOT destroyed by a disinfection agent?
    • A. 

      Gram-positive rods

    • B. 

      Viruses

    • C. 

      Bacterial spores

    • D. 

      Gram-negative cocci

  • 17. 
    What solution should be used to disinfect the surfaces of the room of a patient who was infected with C. difficile?
    • A. 

      1% sodium benzoate

    • B. 

      5% iodine solution

    • C. 

      70% ethyl alcohol

    • D. 

      5.25% sodium hypochlorite

  • 18. 
    Which of the following statements is NOT true regarding the use of alcohol disinfectants?
    • A. 

      They can damage rubber tubing.

    • B. 

      They are considered sporicidal.

    • C. 

      Their activity drops when diluted below 50% concentration

    • D. 

      Alcohols are good for surface cleaning of stethoscope bells and diaphragms.

  • 19. 
    Which of the following statements is NOT true regarding the use of phenolics as a disinfectant?
    • A. 

      They are ineffective on surfaces shortly after application.

    • B. 

      They cause tissue irritation.

    • C. 

      They are fungicidal.

    • D. 

      They are bactericidal.

  • 20. 
    Which of the following characteristics is true for iodophors as disinfectants?
    • A. 

      Less irritating to tissue

    • B. 

      Water soluble

    • C. 

      Nonstaining

    • D. 

      All the above

  • 21. 
    Which of the following statements is NOT true regarding the use of glutaraldehyde?
    • A. 

      It is not used for disinfection on surfaces due to cost.

    • B. 

      It can cause significant tissue inflammation in workers who use it.

    • C. 

      It is a true sterilizing agent when used properly.

    • D. 

      It can retain activity up to 90 days once activated

  • 22. 
    What is the recommended dilution level of bleach according to the CDC for cleaning up blood spills?
    • A. 

      1:10

    • B. 

      1:20

    • C. 

      1:1

    • D. 

      1:5

  • 23. 
    What is the most common, efficient, and easiest sterilization method?
    • A. 

      Steam sterilization

    • B. 

      Use of hydrochlorofluorcarbon

    • C. 

      Flash sterilization

    • D. 

      ETO

  • 24. 
    Which of the following statements is NOT true regarding the use of ETO for sterilization?
    • A. 

      Acute exposure is of little consequence.

    • B. 

      It is useful for equipment that cannot be autoclaved.

    • C. 

      Will penetrate prewrapping.

    • D. 

      It is harmless to rubber and plastics.

  • 25. 
    Which of the following is the most common source of patient infections?
    • A. 

      Internal circuits of a ventilator

    • B. 

      Oxygen therapy devices

    • C. 

      Large-volume nebulizers

    • D. 

      Small-volume nebulizers

  • 26. 
    Which of the following steps for disinfection of a bronchoscope is NOT true?
    • A. 

      The device is stored lying flat to promote drying.

    • B. 

      Drying techniques can include forced air.

    • C. 

      The first step is cleaning the scope.

    • D. 

      Disinfection is done by immersion in a liquid disinfectant

  • 27. 
    Which of the following organisms has been associated with health care–associated infections in patients using a poorly disinfected bronchoscope?
    • A. 

      M. tuberculosis

    • B. 

      Pseudomonas aeruginosa

    • C. 

      Klebsiella

    • D. 

      Both A and B

  • 28. 
    Which of the following statements is/are true regarding the use of disposable respiratory care equipment?
    • A. 

      Reusing the equipment is often done

    • B. 

      Many quality issues exist.

    • C. 

      Recent research supports their use as a cost-effective measure

    • D. 

      All of the above are true.

  • 29. 
    Which of the following is NOT a category under Expanded Precautions?
    • A. 

      Standard precautions

    • B. 

      Airborne Infection Isolation

    • C. 

      Contact precautions

    • D. 

      Droplet precautions

  • 30. 
    What is the minimum recommended time for handwashing in the health care environment?
    • A. 

      30 seconds

    • B. 

      60 seconds

    • C. 

      5 seconds

    • D. 

      15 seconds

  • 31. 
    Which of the following statements is NOT true regarding the use of sterile gloves in the hospital setting?
    • A. 

      The same pair can be used on numerous patients if noninvasive procedures are done.

    • B. 

      They may have small invisible defects that cause contamination of the user’s hands.

    • C. 

      They should not be used as a substitute for handwashing.

    • D. 

      They should be worn for all invasive procedures.

  • 32. 
    Which of the following is NOT one of the five key recommended components of an infection control program in the hospital setting?
    • A. 

      Investigation

    • B. 

      Reporting

    • C. 

      Surveillance

    • D. 

      Development