Chapter 9 Questions
A hospital administrator is tasked with buying the ideal antimicrobial agent for use by the housekeeping staff. Which of the following statements is true concerning the selection of an ideal antimicrobial agent? An ideal antimicrobial agent would be stable during storage. An ideal antimicrobial agent would be fast acting. Universally ideal microbial agents do not exist. All of the above are correct.
An ideal antimicrobial agent would be stable during storage. An ideal antimicrobial agent would be fast acting. Universally ideal microbial agents do not exist.
The endospores of which organism can be used as a biological indicator of sterilization? Bacillus stearothermophilus Salmonella enterica Mycobacterium tuberculosis Staphylococcus aureus
Bacillus stearothermophilus
The microbial death rate is used to measure the efficiency of . a detergent an antiseptic sanitization techniques all of the above
a detergent, an antiseptic, and sanitization techniques
Which of the following is a more accurate term that the student nurse should have used? disinfectant antiseptic sanitizer pasteurization
antiseptic
A surgical team is prepping a patient for surgery. Which of the following adjectives best describes a surgical procedure that is free of microbial contaminants? disinfected sanitized sterilized aseptic
aseptic
A sample of E. coli has been subjected to heat for a specified time, and 90% of the cells have been destroyed. Which of the following terms best describes this event? thermal death point thermal death time decimal reduction time none of the above
decimal reduction time
The preservation of beef jerky from microbial growth relies on which method of microbial control? filtration lyophilization desiccation radiation
desiccation
Biosafety Level 3 laboratory includes . double sets of entry doors pressurized suits showers in entryways all of the above
double sets of entry doors
Which antimicrobial chemical has been used to sterilize spacecraft? phenol alcohol heavy metal ethylene oxide
ethylene oxide
Which of the following chemicals is active against bacterial endospores? copper ions ethylene oxide ethanol triclosan
ethylene oxide
Which of the following types of radiation is approved for microbial control in meats, spices, and fresh fruits and vegetables? gamma rays ultraviolet light waves radio waves microwaves
gamma rays
A dental hygienist needs to remove microbes from some retainers. Which of the following substances is least toxic to humans? carbolic acid glutaraldehyde hydrogen peroxide formalin
hydrogen peroxide
Which of the following substances would likely inhibit anaerobes most effectively? phenol silver ethanol hydrogen peroxide
hydrogen peroxide
A company that manufactures an antimicrobial cleaner for kitchen counters claims that its product is effective when used in a 50% water solution. By which of the following means might scientists best verify this statement? disk-diffusion test phenol coefficient filter paper test in-use test
in-use test
Which of the following disinfectants acts against cell membranes? phenol peracetic acid silver nitrate glutaraldehyde
phenol
Which of the following items functions most like an autoclave? boiling pan incinerator microwave oven pressure cooker
pressure cooker
Which class of surfactant is most soluble in water? quaternary ammonium compounds alcohols soaps peracetic acids
quaternary ammonium compounds
A hospital worker uses hydrogen peroxide to reduce microbial growth on the benches, chairs, and tables in the cafeteria. Which of the following terms best describes the process? pasteurization antisepsis sterilization sanitization
sanitization
A student nurse tells his patient that he is using alcohol as a sterilizing agent on the patient's arm before giving an injection. His terminology is not accurate, however. Which of the following statements provides a practical definition of sterilization in the context of everyday use? Sterilization eliminates organisms and their spores or endospores. Sterilization eliminates harmful microorganisms and viruses. Sterilization eliminates all microbes and prions. Sterilization eliminates hyperthermophiles.
sterilization eliminates organisms and their spores or endospores.
Which of the following disinfectants contains alcohol? iodophor quat formalin tincture of bromine
tincture of bromine
