Exam 8: Control of Microorganisms in the Environment

The first product to be commercially treated by pasteurization was

Betapropiolactone is not as useful as ethylene oxide as a sterilizing agent because it does not penetrate materials as readily as ethylene oxide.

Bacteriophage therapy was developed after antibiotics were first discovered and used for treating bacterial infections.

Alcohols are widely used as antiseptics and disinfectants because they are effective against endospores as well as vegetative cells.

The reduction of the microbial population to levels that are considered safe by public health standards is called

When comparing dry heat and moist heat sterilization, dry heat is

All germicides are capable of killing all pathogenic organisms and endospores.

An agent that specifically kills fungi but not other kinds of microorganisms is also known as a

Heavy metals are effective antimicrobial agents but are not widely used because of their high toxicity to humans.

The substantial reduction of the total population of microorganisms on inanimate objects and the destruction of potential pathogens is called

Iodine can be complexed with an organic carrier to form water-soluble, stable complexes called __________, which release iodine slowly and eliminate skin burns and irritation associated with iodine use.

Amphipathic organic molecules that serve as disinfectants by disrupting membranes and denaturing proteins are called

The disinfectant screening method that is known as the ________ _________ test, which is used to measure the potency of a disinfectant.

Which kind of sterilization procedure takes advantage of the size of microorganisms?

The disinfectant of choice for municipal water supplies is __________.

Larger populations generally are killed as rapidly as smaller populations.

Which of the following lacks sufficient penetrating power for bulk sterilization?

The destruction or removal of all viable organisms is called

The rate of killing by an antimicrobial agent may slow when the microbial population has been greatly reduced because the remaining population may have a high proportion of resistant organisms.

Which of the following influence(s) the efficiency of an antimicrobial agent?