Questions and Answers
Sanitization leaves an object free of microbes.
False
Ionizing radiation can penetrate surfaces, but nonionizing radiation cannot.
True
Moist-heat sterilization protocols require the use of higher temperatures for longer periods of time than do dry-heat sterilization protocols.
False
Soaps are classified as disinfectants.
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Mercury-based compounds have fallen out of favor for use as preservatives and antiseptics.
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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) ________ item.
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The goal of ________ ________ protocols is to rid canned produce of Clostridium botulinum endospores.
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In an autoclave, the application of pressure to ________ is increased to allow the steam to achieve temperatures above the boiling point of water.
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Doorknobs and other surfaces in clinical settings are often coated with ________, ________, or ________ to prevent the transmission of microbes.
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If a chemical disinfectant is more effective than phenol, then its phenol coefficient would be ________ than 1.0.
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If used for extended periods of time, ________ germicides may lead to sterility.
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In the disk-diffusion assay, a large zone of inhibition around a disk to which a chemical disinfectant has been applied indicates ________ of the test microbe to the chemical disinfectant.
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Study Notes
Control of Microbial Growth
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Sanitization does not eliminate all microbes; it reduces their numbers to safe levels, making the statement false.
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Ionizing radiation effectively penetrates various surfaces, while nonionizing radiation lacks this capability, confirming the statement as true.
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Moist-heat sterilization is typically conducted at lower temperatures compared to dry-heat sterilization, making the claim about higher temperatures false.
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Soaps are primarily cleaning agents rather than disinfectants, which renders the assertion false.
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Mercury-based compounds have seen a decline in use for preservatives and antiseptics due to safety concerns, indicating this statement is true.
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A medical item that touches intact skin, without contact with sterile tissues or mucous membranes, is categorized as a noncritical item.
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Commercial sterilization aims to eliminate Clostridium botulinum endospores from canned goods, emphasizing the need for effective pathogen control in food products.
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In autoclaves, steam pressure must be elevated to surpass water's boiling point, enabling effective sterilization processes.
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Clinical surfaces, like doorknobs, are often treated with metals such as copper, nickel, or zinc to combat microbial transmission.
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A phenol coefficient greater than 1.0 indicates that a disinfectant is more effective than phenol itself.
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High-level germicides have the potential to induce sterility when used for prolonged periods.
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In the disk-diffusion assay, a considerable zone of inhibition signifies susceptibility or sensitivity of the microorganism to the applied chemical disinfectant, providing insight into its efficacy.
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Description
Test your knowledge on microbial growth control with this chapter 13 review. Engage with true/false statements and fill-in-the-blank questions designed to reinforce your understanding of sterilization and sanitation methods. Perfect for students looking to solidify their grasp on key concepts from their microbiology studies.
