BIOL 210 Ch. 11 Quiz

42 terms by mandercruso

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bacterial endospores

microbial form that has the highest resistance to physical and chemical controls

sterilization

the process that destroys or removes all microorganisms and microbial forms including bacterial endospores on inanimate objects is

disinfection

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

antisepsis

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

sporicide

type of control agent that would be used to achieve sterility

vegetative bacteria and fungi

the easiest microbial forms to kill or inhibit are

sanitization

a cleansing method that mechanically removes microbes and other debris to reduce contamination is

constant

cells in a culture die at a __ rate

cytoplasm

the __ is not a target of antimicrobial agents

surfactants

work by disrupting membrane integrity

x-rays

__ cannot denature microbial proteins

moist heat

__ does not affect microbial nucleic acids

hydrogen peroxide

physical agent that does not control microbial growth

less

dry heat is __ efficient than moist heat

121C at 15 psi for 15 minutes

the minimum sterilizing conditions in a steam autoclave are

thermal death time

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

thermal death point

the lowest temperature needed to kill all microbes in 10 minutes is the

pasteurization

__ reduces the number of vegetative forms

ultra high temperature

a method for sterilizing milk, called __ treatment, uses 134C for 1 to 2 seconds

tyndallization

intermittent sterilization, which uses three days of lower temperature team for short periods of time is also called

lactobacillus

__ is not a primary target of milk pasteurization

lyophilization

vials of microorganisms that undergo the freeze-drying process called __ will remain preserved and viable for years

desiccation

removal of moisture by dehydration is called

ultraviolet

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

gamma rays and x rays

electrons are ejected from atoms in cells when organisms are exposed to

OR air, cured meats, surgical gloves, human tissues

items that are typically irradiated in order to kill microbes include:

HEPA filters

__ are used to remove microbes from air

filtration

__ is a control method that removes microorganisms rather than inhibiting or killing them

betadine

iodophors include __

sterilization

destruction of all microbial life

disinfection

destroys most microbial life, reducing contamination on inanimate surfaces

antisepsis

disinfection of a living surface

decontamination

the mechanical removal of most microbes

sanitization

any cleansing technique that mechanically removes microorganisms as well as other debris to reduce contamination to safe levels

degerming

scrubbing the skin or immersing in chemicals or both

asepsis

any practice that prevents the entry of infectious agents into sterile tissues and thus prevent infections

bactericide

a chemical that destroys bacteria except for endospores

germicide

chemical agent that kills microorganisms

bacteriostasis

any process or agent that inhibits bacterial growth

sepsis

the growth of microorganisms in the blood and other tissues

cide

to kill

stasis or static

to stop

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