lecture 10.txt

lecture 10

no microorganism on a surface

reduce the number of microbes

used to kill most pathogens on an inanimate surface

used to kill most pathognes on living tissue

reduce pathogens to a standard safe level

reduce all organisms to a set safe level

protozoa with tough membrane that is resistant to chemicals

virus with no lipid envelope that is resistant to drying and isinfectants

lipid coated virus which is easy to get rid of with drying

time it takes to kill 90% of organisms

instruments which come in contact with body tissues which must be sterile

instrument which comes in contact with mucous membranes and can have spores

instrument which only comes in contact with external organs and only needs low level disinfectant

uses steam to heat at 121 degrees Celsius for 15 to 45 minutes; achieves sterilization

kills 99.9995 of bacteria by heating at 72 degrees Celsius for 12 seconds; type of pasteurization

sterilizes by heating at 150 degrees Celsius for 1 second

membrane made out of a dense polymer with .2 micrometer holes to filter bacteria out of liquid

used to filter bacteria out of air by trapping organisms in mesh

high energy wavelengths that penetrate surfaces to sanitize foods or surgical materials

chemical that kills everything including spores

chemical that kills everythign but spores; can be used on semicritical instruments

kills everythign but spores and a few viruses; used for noncritical instruments

allow some mycobacteria naked viruses and spore to survive

rigidify proteins so they can�t unfold or die

makes membranes leaky; used in mouthwash and skincare

gaseous sterilant that oxidizes DNA

oxidizes protein so they can�t function

uses heavy metals to prevent disulfide bonds in cysteine

dissolve lipid membranes

targets specific part; bacteria become resistant

dissolve membranes; used in soaps and cosmetics; low level