CHPT 11 TEST – Flashcards

Microbiological contaminants are best described as:

Physical agents for controlling microbial growth include all of the following, except:

Which of the following microbial forms have the highest resistance to physical and chemical controls?

The process that destroys or removes all microorganisms and microbial forms including bacterial endospores is:

The process of using a cleansing technique to mechanically remove and reduce microorganisms and debris to safe levels is:

The use of a physical or chemical process to destroy vegetative pathogens is:

The use of chemical agents directly on exposed body surfaces to destroy or inhibit vegetative pathogens is:

Scrubbing or immersing the skin in chemicals to reduce the numbers of microbes on the skin is:

Which of the following types of control agents would be used to achieve sterility?

Which is correct regarding the rate of microbial death?

Sterilization is achieved by:

Dry heat:

Endospores can be killed by: A. dry heat at 170° C for 2 hours. B. incineration. C. glutaldehyde for 3 or more hours. D. ethylene oxide for 3 or more hours. E. All of the choices are correct.

The minimum sterilizing conditions in a steam autoclave are:

The shortest time required to kill all the microbes in a sample at a specified temperature is called the:

Disinfection of beverages, such as apple juice, milk, and wine, is optimally achieved by:

Electrons are ejected from atoms in cells when organisms are exposed to:

Which of the following items are typically irradiated in order to kill microbes? A. ground beef and other meat and poultry B. human tissues such as heart valves and skin C. operating room air D. surgical gloves E. All of the choices are correct.

HEPA filters are used to remove microbes from:

Which of the following does not contain a heavy metal?

All of the following are phenols or phenolics, except:

The easiest microbial forms to kill or inhibit are:

Which control method would not be a suitable choice for killing Mycobacteria in a capped culture tube?

All of the following pertain to hypochlorites, except:

Which of the following is not used as an antiseptic?

Iodophors include:

The compound that is an organic base containing chlorine and two phenolic rings and is used increasingly for handscrubbing, neonatal washes, wound degerming, and prepping surgical skin sites is:

Alcohols: A. denature proteins when in a 50-95% alcohol-water solution. B. disinfect items soaked in alcohol. C. are skin degerming agents. D. at 50% or higher concentrations dissolve cell membrane lipids. E. All of the choices are correct.

Which is mismatched? A. sodium hypochlorite - chlorine B. iodophor - iodine C. benzalkonium chloride - quaternary ammonium compound D. Merthiolate - silver E. formalin - formaldehyde

All of the following are correct about iodophors, except: A. they are complexes of iodine and a neutral polymer. B. this formulation allows a quick release of free iodine. C. this formulation increases its penetration. D. it is less prone to staining or irritating tissue. E. a common iodophor is Betadine.

The sterilizing gas used in a special chamber is:

The chemical agent that produces highly reactive hydroxyl-free radicals and also decomposes to O2 gas is:

All the following are correct about detergents, except: A. they are polar molecules that act as surfactants. B. the most effective ones are positively charged. C. in low concentrations they are bacteriostatic. D. they are ineffective against the tuberculosis bacteria. E. they are active in the presence of organic matter.

Ethylene oxide is:

Which of the following is being used to replace hypochlorites in treating water because of the possibility of cancer-causing substances being produced?

Which of the following chemicals is a disinfectant for soft contact lenses?

Which of the following is officially accepted as a sterilant and high-level disinfectant?

All of the following are correct about food irradiation, except:

All of the following are benefits of food irradiation, except:

All of the following are methods of disinfection or sterilization, except:

Historically, which of the following was instilled into the eyes of newborn infants to prevent gonococcal infections?

Which common hospital pathogen is able to grow abundantly in soap dishes?

All of the following are correct about the autoclave, except: A. it is important not to overload the chamber. B. it is effective for sterilizing powders, oils, and waxy substances. C. the duration of the process depends on how full the chamber is. D. it is the temperature that kills the microbes, not the pressure by itself. E. sterilization is achieved when steam condenses against the objects in the chamber and raises their temperatures.

Which of the following types of agents targets protein conformation?

Using toilet bowl cleaner and nonionizing radiation to non-animate surfaces only removes or kills vegetative bacteria. The term that best describes this action is:

Which of these metals have antimicrobial properties associated with them? A. Silver B. Gold C. Tin D. Aluminum E. Both A and B are correct.

Commercial products containing which chemicals are more effective at killing microorganisms?

_____ heat is more rapidly effective and efficient compared to _____ heat

Vials of microorganisms that undergo the freeze-drying process called _____ will remain preserved and viable for years.

A method for sterilizing milk, called _____ temperature treatment, uses 134° C for 1 to 2 seconds

_____ radiation excites atoms to a higher energy state within molecules such as DNA that then leads to the formation of pyrimidine dimers.

Some microbial control agents are able to _____ cell proteins by breaking bonds that maintain the native state, three-dimensional configuration of the proteins

_____ filters are widely used to provide a flow of sterile air to hospital rooms.

_____ is a halogen used in gaseous and liquid form for large scale disinfection of drinking water and sewage.

__________ or steam sterilization is the process by which steam is heated under pressure to sterilize objects.

a microbicidal agent has what effect?

microbial control methods that kill _____ are able to sterilize.

any process that destroys the non-spore forming contaminants on inanimate objects is

sanitization is a process by which

an example of an agent that lowers surface tension of cells is

high temps _____ and low temps___

the primary action of ____ heat is to ______

microbes that are the targets of pasteurization include

ionizing radiation removes ______ from atoms

the primary mode of action for nonionizing radiation is to

the most versatile method of sterilizing heat sensitive liquids is

_____is the iodine antiseptic of choice for wound treatment

a chemical with sporicidal properties is

silver sulfadiazine is used

detergents are _______ ______

which of the following is an approved sterilant?