A medical item that comes into contact with intact skin and does not penetrate sterile tissues or come into contact with mucous membranes is called a(n) noncritical item.
Missing Word
noncritical
Noncritical items pose the lowest risk of infection because they only contact intact skin. Effective cleaning and disinfection of these items are sufficient to prevent pathogen transmission.
Question 2
The goal of commercial sterilization protocols is to rid canned produce of Clostridium botulinum endospores.
Missing Words
commercial, sterilization
Commercial sterilization aims to eliminate Clostridium botulinum endospores to prevent botulism. These endospores are highly resistant to heat and can germinate in anaerobic canned environments, producing a potent neurotoxin.
Question 3
In an autoclave, the application of pressure is increased to allow steam to achieve temperatures above the boiling point of water.
Missing Word
steam
Autoclaves use pressurized steam to achieve temperatures above 100°C, which is necessary to kill bacterial endospores. The increased pressure allows for higher temperatures, leading to effective sterilization.
Question 4
Doorknobs and other surfaces in clinical settings are often coated with copper, nickel, or zinc to prevent the transmission of microbes.
Missing Word
copper
Copper, nickel, and zinc possess antimicrobial properties, particularly through the release of ions that disrupt microbial cell function. These metals are used on surfaces to reduce the spread of pathogens through contact.
Question 5
If a chemical disinfectant is more effective than phenol, then its phenol coefficient would be greater than 1.0.
Missing Word
greater
The phenol coefficient compares the effectiveness of a disinfectant to that of phenol under specific conditions. A coefficient greater than 1.0 indicates that the disinfectant is more effective than phenol at the same concentration.
Question 6
If used for extended periods of time, high-level germicides may lead to sterility.
Missing Word
high-level
High-level germicides can kill all vegetative cells, viruses, and endospores, potentially achieving sterility if used correctly and for sufficient durations. Sterility implies the complete absence of viable microorganisms.
Question 7
In the disk-diffusion assay, a large zone of inhibition around a disk to which a chemical disinfectant has been applied indicates susceptibility of the test microbe to the chemical disinfectant.
Missing Word
susceptibility
A large zone of inhibition in a disk-diffusion assay indicates that the antimicrobial agent is effective at inhibiting the growth of the microbe. The size of the zone reflects the microbe's sensitivity to the agent.