Bacteria Identification and Disinfection Quiz

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Questions and Answers

What is the main purpose of viewing microbes up close with light and electron microscopes?

  • To determine the exact number of microbes present on a surface
  • To remove all the microbes from a surface
  • To identify the types of microbes present on a surface (correct)
  • To clean and disinfect the surfaces

What is the role of a microbiologist in the detection of microscopic organisms?

  • Sterilizing medical devices
  • Culturing the microbes until they grow into a detectable form (correct)
  • Viewing microbes up close with microscopes
  • Cleaning and disinfecting surfaces

What is the first step in decontaminating the needle described in the text?

  • Cleaning it to remove any dirt, soil, and bacteria (correct)
  • Sterilizing the needle to kill all remaining microbes
  • Viewing the needle under high magnification
  • Putting it through a disinfection process

Why is it impossible to visually determine when all microbes have been removed during decontamination processes?

<p>Due to the presence of bacteria sticking to the needle (D)</p> Signup and view all the answers

What is the significance of sterilization in the context of decontaminating medical devices?

<p>To kill all remaining microbes on medical devices (A)</p> Signup and view all the answers

What is the primary reason for using a disinfection process on the needle?

<p>To kill as many remaining microbes as possible (D)</p> Signup and view all the answers

What is the primary reason for performing disinfection or sterilization after the cleaning process?

<p>To kill any microbes missed by the cleaning procedures (C)</p> Signup and view all the answers

Why is it important for specialists in Central Sterile Supply Department (CSSD) to know about microbiology and microbes?

<p>To understand contamination risks and proper decontamination procedures (D)</p> Signup and view all the answers

What are the best studied microbes referred to as?

<p>Pathogens (D)</p> Signup and view all the answers

Why is it becoming a serious problem when microbial infections can no longer be treated using antibiotics?

<p>Because microbial infections are becoming more resistant to many or all available antibiotics (A)</p> Signup and view all the answers

What are the basic requirements for all microorganisms to grow and reproduce?

<p>Food and moisture (C)</p> Signup and view all the answers

What is an example of a survival strategy used by bacteria under stressful conditions?

<p>Altered metabolism (C)</p> Signup and view all the answers

Why is it important to clean reusable medical devices as soon as possible after use?

<p>To avoid rapid multiplication of bacteria on the devices (B)</p> Signup and view all the answers

Why do some yeasts, like Candida, multiply as quickly as bacteria?

<p>Because they have optimal growth conditions similar to human tissue (C)</p> Signup and view all the answers

What is the primary reason for understanding biofilms in the context of microbiology?

<p>To realize that most microbes naturally grow as biofilms (D)</p> Signup and view all the answers

Why are enveloped viruses, such as Hepatitis B, HIV, and Herpes, more susceptible to protein, heat, and drying than non-enveloped viruses?

<p>Because enveloped viruses have a lipid envelope (C)</p> Signup and view all the answers

What is the primary function of prions outside of host cells?

<p>To remain biologically inert and persist for various lengths of time (A)</p> Signup and view all the answers

What is a characteristic feature of bacteria under optimal growth conditions?

<p>They form spores and alter their metabolism (D)</p> Signup and view all the answers

What is the approximate rate at which the forearm sheds dead skin cells per hour?

<p>1300 cells (D)</p> Signup and view all the answers

What is the primary purpose of using hygiene procedures and appropriate PPE in clean or sterile zones in the CSSD?

<p>To prevent contamination of reusable medical devices (B)</p> Signup and view all the answers

What is the main reason for wearing two layers of clothing when entering critical areas?

<p>To prevent contamination of the environment (C)</p> Signup and view all the answers

What is one of the requirements for PPE in the Decontamination Zone in CSSD?

<p>Discarding used gloves before touching anything (C)</p> Signup and view all the answers

What is the purpose of wearing gloves in the Decontamination Zone?

<p>To protect against contaminated reusable medical devices (B)</p> Signup and view all the answers

What is a requirement for workwear in the IAP or sterile storage zones in CSSD?

<p>Changing scrubs daily or whenever they become visibly soiled (D)</p> Signup and view all the answers

What is the purpose of wearing dedicated non-slip enclosed footwear in CSSD?

<p>Protecting against injury or contact with sharp objects (D)</p> Signup and view all the answers

Why should gloves be removed without contaminating hands in the Decontamination Zone?

<p>To avoid contaminating surfaces and pens (A)</p> Signup and view all the answers

What is a requirement for wearing fluid-resistant masks with visor eye shields in the Decontamination Zone?

<p>Avoiding touching mask or eye shield with hands while working (B)</p> Signup and view all the answers

What is recommended when using disposable shoe covers in the Decontamination Zone?

<p>Replacing them if there is any sign of damage (B)</p> Signup and view all the answers

What is emphasized for workwear in the IAP or sterile storage zones in CSSD?

<p>Washing hands before and after using gloves (D)</p> Signup and view all the answers

What should be done when gloves become moist or visibly soiled while working in the Decontamination Zone?

<p>Remove them immediately and discard them appropriately (A)</p> Signup and view all the answers

What is the main purpose of Standard Precautions in healthcare?

<p>To minimize the risk of infection regardless of the perceived infectious risk (D)</p> Signup and view all the answers

Why is it important to be familiar with maintenance of personal hygiene appropriate to the unit's zone in the CSSD?

<p>To protect reusable medical devices from contamination by personnel (A)</p> Signup and view all the answers

What is the rationale for applying Standard Precautions in the decontamination zone of the CSSD?

<p>To handle reusable medical devices safely after decontamination (C)</p> Signup and view all the answers

What is the main concern addressed by the Chain of Infection concept?

<p>Transmission of microbial infections and means to prevent it (B)</p> Signup and view all the answers

Why are hospital patients particularly susceptible to infection?

<p>Due to being in poor health and having compromised immune systems (A)</p> Signup and view all the answers

What is an important measure to minimize the reservoir of infection in a hospital environment?

<p>Thoroughly cleaning and disinfecting the environment and equipment (C)</p> Signup and view all the answers

Why do hospital staff constantly try to minimize the reservoir of infection in healthcare environments?

<p>To reduce the spread of infectious microbes around the environment (C)</p> Signup and view all the answers

What are some examples of infections that have developed resistance in recent times?

<p>&quot;Methicillin Resistant Staphylococcus aureus (MRSA), multi-drug resistant Tubercle bacillus (MDR TB)&quot; (C)</p> Signup and view all the answers

What is a key reason for trying to break the chain of infection from various sources or reservoirs in healthcare settings?

<p>&quot;To prevent infected reusable medical devices from being used on patients&quot; (A)</p> Signup and view all the answers

Why do healthcare professionals apply prompt treatment measures?

<p>&quot;To prevent infections from spreading within the healthcare facility&quot; (D)</p> Signup and view all the answers

What is the main function of the slime matrix secreted by microbes in a biofilm?

<p>To provide a protective covering for the microbes (A)</p> Signup and view all the answers

In what way do biofilms make pathogens more difficult to eradicate?

<p>By providing a protective environment for pathogens to multiply (C)</p> Signup and view all the answers

Why is it best practice to avoid delays before starting decontamination of used reusable medical devices?

<p>To reduce the risk of microbial spread to processed devices and staff (D)</p> Signup and view all the answers

Which type of microorganisms have life-cycle stages that are encysted (within a tough protective capsule)?

<p>Protozoa (D)</p> Signup and view all the answers

What characteristic makes fungi resistant to disinfectants?

<p>Thick cell walls and spores (A)</p> Signup and view all the answers

How are yeasts identified in the laboratory?

<p>By culture in the laboratory to form colonies and examining cell shapes under the microscope (A)</p> Signup and view all the answers

What characteristic distinguishes bacteria from other microorganisms?

<p>Presence of a nucleus and multiplication by budding (A)</p> Signup and view all the answers

What is the main challenge in removing bacteria from uneven surfaces during cleaning?

<p>Resistance of bacteria to heat and chemicals (A)</p> Signup and view all the answers

What is the main purpose of regular microbiological testing in the CSSD?

<p>To monitor the efficacy of cleaning and decontamination protocols (C)</p> Signup and view all the answers

What is the role of neutral detergent and cleaning enzymes when used on reusable medical devices?

<p>To prevent biofilm formation on the devices (D)</p> Signup and view all the answers

What is the main method used for identification of fungal pathogens?

<p>Growth in the laboratory to form colonies (B)</p> Signup and view all the answers

What is the main reason why spores often resist disinfectants?

<p>They have a protective outer layer (B)</p> Signup and view all the answers

Which method is most commonly used to identify bacteria in the laboratory?

<p>Microscopy of gram stained smears (B)</p> Signup and view all the answers

How are viruses detected by damage they cause to healthy human or animal cells in culture?

<p>By forming plaques or areas of destruction (D)</p> Signup and view all the answers

What is the main reason why prions are difficult to remove from reusable medical devices?

<p>They are very small and adhere strongly to surfaces (B)</p> Signup and view all the answers

What is the main function of the commensal microbes found in the human body?

<p>To stimulate the immune system and carry out beneficial functions (C)</p> Signup and view all the answers

Which method is usually used to detect prions on reusable medical devices?

<p>Specific antibodies linked to dyes (C)</p> Signup and view all the answers

What is the most common method for identifying viruses in the laboratory?

<p>Tissue culture methods (C)</p> Signup and view all the answers

What differentiates prions from viruses and bacteria?

<p>They are proteinaceous units causing TSEs (D)</p> Signup and view all the answers

What makes microbes difficult to eliminate in clinical environments?

<p>The potential beneficial functions for humans (B)</p> Signup and view all the answers

What is the main reason why viruses can be difficult to remove during cleaning?

<p>They can be resistant to disinfectants and heat (A)</p> Signup and view all the answers

What is the most usual way that prions are detected?

<p>By histopathology of infected tissue using specific antibodies linked to dyes (B)</p> Signup and view all the answers

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