Free NNAAP Infection Control Questions and Answers — Questions and Answers
Question 1: To avoid cross-contamination, when should the high-speed handpiece or air-water syringe be flushed with water?
- After each patient (Correct answer)
- At the time of the lubrication
- Once a day
- Once a week
Correct answer: After each patient
To avoid cross-contamination, the high-speed handpiece or air-water syringe should be flushed with water after each patient. This helps to remove any potential bacteria or debris that may have been introduced during the procedure, ensuring a clean and safe environment for the next patient. Flushing with water helps to maintain the hygiene and sterility of the equipment, reducing the risk of infections or transmission of pathogens.
Question 2: The substance produced by the body in response to the hepatitis B vaccine is a/an
- Antibody (Correct answer)
- Antigen
- Virus
- Bacterium
Correct answer: Antibody
The substance produced by the body in response to the hepatitis B vaccine is an antibody. When a person receives the hepatitis B vaccine, their immune system recognizes the vaccine as a foreign substance and produces antibodies to fight against it. These antibodies help to protect the body from future infections by the hepatitis B virus.
Question 3: Instruments can be pre-soaked in holding solution immediately after use to
- Kill bacterial spores
- Prevent drying of blood and organic matter (Correct answer)
- Safely use the instruments without further processing
- Eliminate the need for ultrasonic cleaning
Correct answer: Prevent drying of blood and organic matter
Pre-soaking instruments in a holding solution immediately after use helps prevent drying of blood and organic matter. This is important because when blood and organic matter dry on instruments, it becomes much more difficult to clean them effectively. Pre-soaking helps to keep the debris moist, making it easier to remove during the subsequent cleaning process. By preventing drying, the instruments can be safely used without further processing, reducing the risk of contamination. However, pre-soaking alone is not sufficient to kill bacterial spores or eliminate the need for ultrasonic cleaning.
Question 4: Which of the following shows that the sterilization process was successful?
- Readings on autoclave gauges
- Timer indicates full cycle
- Spore tests (Correct answer)
- Visual examination of heat indicating tape
Correct answer: Spore tests
Spore tests are used to confirm the effectiveness of the sterilization process. These tests involve placing bacterial spores on a test strip or in a vial and subjecting them to the sterilization process. Afterward, the spore tests are analyzed to determine if any viable spores survived the process. If no spores are found, it indicates that the sterilization process was successful in killing all microorganisms, making it a reliable indicator of the process's effectiveness.
Question 5: To prevent cross-contamination in the dental office, which of the following is true regarding the use of latex gloves?
- Wash gloves between patients
- Use a new pair of gloves with each patient (Correct answer)
- Disinfect gloves between patients
- Autoclave gloves between patients
Correct answer: Use a new pair of gloves with each patient
To prevent cross-contamination in the dental office, it is important to use a new pair of gloves with each patient. This is because gloves can become contaminated with microorganisms during patient care, and reusing them can lead to the transfer of these microorganisms to other patients. Therefore, using a new pair of gloves for each patient helps to maintain a sterile environment and minimize the risk of infection transmission.
Question 6: The use of personal protective equipment is necessary because herpetic conjunctivitis can manifest in/on the
- Skin
- Lungs
- Tongue
- Eyes (Correct answer)
Correct answer: Eyes
Herpetic conjunctivitis is an infection caused by the herpes simplex virus that affects the eyes. It leads to inflammation of the conjunctiva, the thin membrane covering the white part of the eyes and the inner surface of the eyelids. Since the question specifically mentions herpetic conjunctivitis, it is important to protect the eyes from exposure to the virus. Therefore, the use of personal protective equipment like goggles or face shields is necessary to prevent transmission of the virus and protect the eyes from infection.
Question 7: A medical laboratory report which states that a patient is HBeAg Pos and HBsAg Pos suggests that this person.
- Has never had a hepatitis B vaccination
- Is currently being treated for hepatitis B
- Is not considered a carrier of hepatitis B
- Is an infectious carrier of hepatitis B (Correct answer)
Correct answer: Is an infectious carrier of hepatitis B
The presence of HBeAg (Hepatitis B e antigen) and HBsAg (Hepatitis B surface antigen) in a medical laboratory report suggests that the person is an infectious carrier of hepatitis B. This means that they are currently infected with the hepatitis B virus and are capable of transmitting the infection to others. It does not provide any information about whether the person has received a hepatitis B vaccination or is currently undergoing treatment for hepatitis B.
Question 8: If rag wheels are to be reused, what would be the BEST means of decontamination?
- Spray with phenolic alcohol between uses.
- Soak in glutaraldehyde
- Wipe off with iodophor.
- Autoclave. (Correct answer)
Correct answer: Autoclave.
Autoclaving is the most effective means of decontamination for reusing rag wheels. Autoclaving uses high pressure and steam to sterilize and kill any microorganisms present on the surface of the rag wheels. This method ensures that the rag wheels are thoroughly cleaned and safe for reuse. Spraying with phenolic alcohol, soaking in glutaraldehyde, or wiping off with iodophor may not provide the same level of sterilization as autoclaving.
Question 9: Which of the following is an example of transmission via droplet infection?
- Contacting through breaks in the skin
- Inhaling through mucous membranes (Correct answer)
- Touching contaminated instruments
- Using an unclean work area
Correct answer: Inhaling through mucous membranes
Inhaling through mucous membranes is an example of transmission via droplet infection. Droplet infection occurs when respiratory droplets, containing infectious pathogens, are generated and expelled by an infected individual through activities such as coughing, sneezing, or talking. These droplets can then be inhaled by another person through their mucous membranes, such as the mouth, nose, or eyes, leading to the transmission of the infection.
Question 10: Controlling microbial contamination and infection is called:
- Sterilization
- Infection control (Correct answer)
- Disinfection of objects
- Sanitization of a contaminated surface
Correct answer: Infection control
Infection control refers to the measures and practices implemented to prevent the spread of infections and control microbial contamination. It involves various strategies such as hand hygiene, proper use of personal protective equipment, sterilization of medical equipment, and disinfection of surfaces. The goal of infection control is to reduce the risk of infections and ensure the safety of individuals in healthcare settings or any environment where the transmission of infectious agents is a concern.
Question 11: One should not use _______ as a surface cover.
- Paper (Correct answer)
- Plastic-backed patient napkin
- Plastic sheet (bag)
Correct answer: Paper
Paper should not be used as a surface cover because it is not waterproof or resistant to spills or stains. Unlike plastic-backed patient napkins or plastic sheets, paper can easily tear or become soaked, which can lead to contamination or damage to the underlying surface. Therefore, using paper as a surface cover is not recommended for maintaining cleanliness and hygiene.
Free NNAAP Infection Control Questions and Answers
To avoid cross-contamination, when should the high-speed handpiece or air-water syringe be flushed with water?