Disinfection Methods for Invasive Medical Procedures

What is the primary function of adding neutral red to media?

To differentiate between lactose fermenters and non-lactose fermenters

Which type of culture media is used for the growth of intracellular bacteria?

Cell / tissue culture

What is the effect of crystal violet on Gram-positive bacteria?

It inhibits their growth

What is the characteristic of lactose fermenters when grown on media with neutral red?

They produce acidic metabolites Signup and view all the answers

What is the primary purpose of using embryonated chicken egg in virology?

To cultivate viruses Signup and view all the answers

What is the effect of bile salts on Gram-negative bacteria?

It enhances their growth Signup and view all the answers

What is the primary purpose of a Biosafety Level 4 facility?

To provide additional precautions and special containment facilities for high-risk agents Signup and view all the answers

Which of the following is NOT a typical example of a pathogen handled under Biosafety Level 1 precautions?

Rabies virus Signup and view all the answers

What is the primary purpose of a biohazard warning sign in a laboratory?

To alert personnel to the presence of infectious materials Signup and view all the answers

Which of the following is a requirement for Biosafety Level 2 precautions?

The use of partial containment equipment Signup and view all the answers

What is the purpose of decontamination of infectious waste in a laboratory?

To reduce the risk of exposure to infectious materials Signup and view all the answers

Which of the following personal protective equipment (PPE) is NOT typically used in a laboratory?

Earplugs Signup and view all the answers

What is the primary reason for using high-level disinfectants on certain medical instruments?

Because the instruments cannot withstand sterilization procedures Signup and view all the answers

What is the most effective way to disinfect medical instruments and items?

Cleaning the surface to remove organic matter before disinfecting Signup and view all the answers

What type of medical instruments are typically treated with intermediate-level disinfectants?

Flexible fiberoptic endoscopes and laryngoscopes Signup and view all the answers

What is the purpose of using low-level disinfectants on certain medical instruments?

To treat noncritical instruments and devices Signup and view all the answers

What is an example of a high-level disinfectant?

Glutaraldehyde Signup and view all the answers

What is the primary difference between high-level and intermediate-level disinfectants?

The strength of the disinfectant Signup and view all the answers

Compared to alcohols, iodophors have a similar range of activity but are slightly more ______________ to the skin.

toxic Signup and view all the answers

Chlorhexidine has broad antimicrobial activity, but its effectiveness is decreased by _______________.

organic material Signup and view all the answers

Parachlorometaxylenol is primarily effective against _______________.

gram-positive bacteria Signup and view all the answers

Triclosan is active against _______________, but not against many other organisms.

bacteria Signup and view all the answers

Virusolve+ is highly effective against _______________.

bacteria, mycobacteria, fungi, viruses, and spores Signup and view all the answers

What is the benefit of using parachlorometaxylenol in hand washing products?

It is nontoxic and has residual activity Signup and view all the answers

What is the primary mechanism of action of BSC fumigation?

The chemical penetrates all internal surfaces within the BSC, including through the HEPA filters Signup and view all the answers

What is the main reason for fumigating a BSC to prevent the outbreak of highly infectious agents?

To prevent the spread of infectious agents to laboratory personnel Signup and view all the answers

What is the primary characteristic of the chemical used in BSC fumigation?

It is a stable liquid at room temperature and converted to a gas or microscopic droplets prior to its release Signup and view all the answers

How often should BSC fumigation be performed as a part of a regular contamination control regimen?

As a part of a regular contamination control regimen, such as in BSL-3 or -4 facilities Signup and view all the answers

What is the primary benefit of fumigating a BSC before non-routine service?

To ensure the safety of service personnel who need to access potentially biologically contaminated areas of the BSC Signup and view all the answers

What is the significance of using a chemical capable of killing bacterial endospores in BSC fumigation?

It indicates the chemical is effective against the most resistant microorganisms Signup and view all the answers