Exam 4: Control of Microorganisms

These disinfectants are cationic, surface-activated agents that work by reducing the surface tension of molecules in a liquid, resulting in the disruption of the cellular membrane of microbes.

All of the following organisms can typically cause infection from aerosolization of specimens, except

Because biosafety level 3 (BSL-3) organisms have the potential for aerosol transmission, and diseases with these agents may have serious lethal consequences, all of the following guidelines apply to BSL-3 laboratories, except:

The chemical or physical method that destroys all forms of life is called

Alcohols use this mechanism to inactivate microorganisms.

The purpose of surgical hand scrubs and waterless hand rubs is to

Chemosterilizers exert their killing effect through all the following mechanisms, except

This chemical is a saturated 5-carbon dialdehyde that has broad-spectrum activity, rapid killing action, and remains active in the presence of organic matter.

These two alcohols are effective in killing enveloped viruses such as hepatitis B virus (HBV).

If a laboratory uses hazardous chemicals, it must

The laboratory exposure control plan should contain all the following, except

Many materials in hospitals that must be sterilized cannot withstand steam sterilization. Gas sterilization is used instead, using this gas.

Disinfectants are usually used at this temperature.

For the most effective microbial killing, all iodophors must be properly diluted because

High-level disinfectants are active against all the following, except

Engineering controls and work practice controls to ensure Standard Precautions are followed include all the following, except

Why is laboratory-acquired infection an obvious hazard for personnel working in a microbiology laboratory?

The comprehensive safety program for the microbiology laboratory needs to fulfill all the following provision, except:

Even though hypochlorites are inexpensive and have a broad range of microbes that they kill, they are not used as sterilants because of

Safety program and work practice controls consist of all of the following, except