Chapter 9 Flashcards
(19 cards)
in practical terms, in everyday use, what is the definition of sterilization
Sterilization eliminates organisms and their spores or endospores
which of the following terms best describe substances or processes kill microogranisms on lab surfaces? A) antiseptic B) Disinfectant C) degermers D) pasteurization
B) disinfectant
Which of the following terms best describes the disinfecting of cafeteria plates A) pasteurization B) antisepsis C) sterilization D) sanitation
D) sanitation
The microbial death rate is used to measure the efficiency of A) detergent B) an antiseptic C) sanitization technique D) all of the above
D
the endospores of which organism can be used as a biological indicator of sterilization
bacillus stearothermophilus
a compnay that manufactures an antimicrobial cleaner for kitchen counters claims that its product is effective when used in 50% water solution. by what means might scientists best verify this statement?
a. disk diffusion
b. phenol coefficient
c. filter paper
d. in use
in-use test
which of the following statements is true of selecting an antimicrobial agent? A. fast acting B. stable during storage C. there is no ideal D. all of the above
All of the above
which of the following items functions most like an autoclave A. boiling pan b. incinerator c. microwave oven d. pressure cooker
d. pressure cooker
the preservation of beef jerky from microbial growth relies on which method of microbial control
desiccation
which type of radiation is more widely used as an antimicrobial technique
electron beams
what substance most effectively inhibits anaerobes?
hydrogen peroxide
what term best describes a surgical procedure that is free of microbial contaminants?
sterile
biosafety level 3 includes
a) double set of entry doors
b) pressurized suits
c) showers in entryway
d) all of above
double set of entry doors
sample of E. Coli has been subjected to heat for a specified time, and 90% of the cells have been destoyed. What term best describes this event?
decimal reduction time
which of the following substance is least toxic to humans?
a) carbolic acid
b) glutaraldehyde
c) hydrogen peroxide
d) formalin
which of the following chemicals is active against bacterial endospores?
a) copper ions
b) ethylene oxide
c) ethanol
d) triclosan
b) ethylene oxide
which of the following disinfectants act against cell membrane?
a) phenol
b) peracetic acid
c) silver nitrate
d) glutaraldehyde
a) phenol
which of the following disinfectants contain alcohol? a iodophor b quat c formalin d tincture of bromine
d tincture of bromine
which antimicrobial chemical has been used to sterilize spacecraft? phenol alcohol heavy metal ethylene oxide
ethylene oxide
