Chapter 13 Flashcards
Autoclaves are designed to kill which of the following heat-resistant microbes?
endospores
To sterilize packaged intravenous tubing, which method would not be acceptable?
nonionizing radiation
The autoclave uses what mechanism(s) for sterilization?
pressure and temperature
Which method of microbial control introduces double-strand breaks into DNA?
ionizing radiation
Which phenolic compound has commonly been added to soap and raises concerns about selection for more antimicrobial-resistant bacteria?
triclosan
What is argyria?
a buildup of silver in the body resulting in blue-gray skin
Ultraviolet light is an example of which type of radiation?
nonionizing radiation
What are the standard conditions for an autoclave?
121 C, 15 psi, 20 minutes
The decimal reduction time (D-value) is how long it takes to kill what percentage of a microbial population?
90%
Contact lens cleaners commonly use which type of chemical agent to control microbial growth?
peroxygen
What actions would be most clearly considered bacteriostatic rather than bactericidal?
placing a bacterial culture in the −80 C freezer
Phenolic compounds can be found naturally in which group of organisms?
plants
Many chemical preservatives, such as potassium sorbate, preserve food products in what way?
by altering the pH
Which halogen or halogen-containing compound is typically used as a form of topical antisepsis?
iodophor
From a clinical perspective, aseptic technique is carried out to do what?
prevent contamination in living tissue
