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26 Cards in this Set
- Front
- Back
Bone and tendons for transplant are decontaminated by |
Supercritical fluids. |
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Glutaraldehyde is considered one of the most effective disinfectants for hospital use. Which of the following statements about glutaraldehyde is false? |
. Stains and corrodes |
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If you were preparing nutrient agar at home and didn't have an autoclave, what could you use to sterilize the nutrient agar |
Pressure cooker at 121°C for 15 minutes |
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Iodophors differ from iodine (I2) in that iodophors |
All of the above. |
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Place the following surfactants in order from the most effective to the least effective antimicrobial activity: |
3-2-1 |
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A disk-diffusion test using Staphylococcus gave the following results: |
10 |
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Table 7.2 |
benzoate |
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Table 7.3 The following data were obtained by incubating gram-positive bacteria in nutrient medium + disinfectant for |
mortum |
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Table 7.3 The following data were obtained by incubating gram-positive bacteria in nutrient medium + disinfectant for |
doom |
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The antimicrobial activity of chlorine is due to which of the following? |
The formation of hypochlorous acid |
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Which concentration of ethanol is the most effective bactericide? |
70% |
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Which of the following could be used to sterilize plastic Petri plates in a plastic wrapper? |
Gamma radiation |
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Which of the following does NOT achieve sterilization? Formaldehyde b. Ethylene oxide c. Autoclave d. Pasteurization Correct e. Dry heat |
Pasteurization |
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Which of the following does NOT directly result from application of heat? Select one: a. Breaking of hydrogen bonds b. Denaturing of enzymes c. Damage to nucleic acids d. Cell lysis e. Breaking of sulfhydryl bonds |
Cell lysis |
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Which of the following is a limitation of the autoclave? Select one: a. Cannot be used with glassware b. Requires a long time to achieve sterilization c. Cannot kill endospores d. Cannot be used with heat-labile materials e. Cannot inactivate viruses |
Cannot be used with heat-labile material |
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Which of the following is NOT a factor contributing to hospital-acquired infections? Select one: a. Some bacteria metabolize disinfectants. b. Invasive procedures can provide a portal of entry for bacteria. c. Gram-negative bacteria are often resistant to disinfectants. d. Bacteria may be present in commercial products such as mouthwash. e. All of the above may contribute to hospital-acquired infection. |
All of the above may contribute to hospital-acquired infection. |
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Which of the following is NOT used to disinfect water? Select one: a. Ozone b. Heat c. Copper sulfate d. Chlorine e. Gamma radiation |
heat |
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Which of the following substances is NOT effective against nonenveloped viruses? Select one: a. Alcohol b. Ozone c. Ethylene oxide d. Chlorine e. All are equally effective. |
Alcohol |
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Which of the following substances is used for surgical hand scrubs? Select one: a. Chlorhexidine b. Phenol c. Chlorine bleach d. Glutaraldehyde e. Soap |
Chlorhexidine |
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Which of the following treatments is the most effective for controlling microbial growth? Select one: a. 72°C for 15 sec. b. 140°C for 4 sec. c. 63°C for 30 min. d. They are equivalent treatments. |
They are equivalent treatments. |
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Which of the following will NOT destroy prions? Select one: a. Boiling b. Proteases c. Incineration d. NaOH + autoclaving at 134°C e. All of the above destroy prions. |
Boiling |
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Which of the following will NOT preserve foods? Select one: a. Ionizing radiation b. Desiccation c. Osmotic pressure d. Microwaves |
microwaves |
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Which of these disinfectants acts by denaturing proteins? Select one: a. Aldehydes b. Alcohols c. Phenolics d. Bisphenols |
Bisphenols |
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Which one of the following does NOT belong with the others? Select one: a. Glutaraldehyde b. Propylene oxide c. Hydrogen peroxide |
Hydrogen peroxide |
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Which one of the following is most resistant to chemical biocides? Select one: a. Gram-negative bacteria b. Protozoan cysts c. Mycobacteria |
Mycobacteria |
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Which one of the following pairs is mismatched? Select one: a. Ozone takes electrons from substances b. Ionizing radiation hydroxyl radicals c. Plasma sterilization free radicals d. Ultraviolet radiation desiccation |
Ultraviolet radiation desiccation |