Exam 8: Control of Microorganisms in the Environment

The prevention of infection caused by microorganisms is called

An agent that prevents the growth of bacteria without causing irreversible damage to the bacteria is referred to as __________.

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.

Which of the following is true about membrane filters?

Which will require a longer time to kill?

Which of the following environmental factors generally do(es)not have an impact on the efficiency of an antimicrobial agent?

Antiseptics are generally regulated by the

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

The time required to kill 90% of the microorganisms or spores in a sample at a specified temperature is the

The destruction or removal of all viable organisms is called

Heavy metals may inactivate proteins by reacting with their sulfhydryl groups.

Disinfectants are generally regulated by the

The two most important alcohol germicides are __________ and __________.

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

Gamma radiation

Moist heat sterilizes by

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

If one left a "Pasteurized" flask of broth for a long time at room temperature,it would stay sterile forever,at least in principle.

Ultraviolet radiation is an effective means of sterilizing surfaces.

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