Control of Microorganisms Flashcards
Removal/ killing of ALL microbial life forms
Sterilization
Removal/ killing of pathogenic organisms but not necessarily bacterial or other spores
Disinfection
Disinfectants are applied to?
Inanimate objects
Antiseptics are applied to?
Living Tissue
Factors that influence the degree of killing
Type of organism Number of organism Concentration of disinfecting agent Amount of organic "soil" present Nature of the surface to be infected Temperature & pH of process Length of contact time Type of water available Biofilms Compatibility of disinfectants
Organisms according to resistance to killing:
MOST RESISTANT –> LEAST RESISTANT
BS, M, NLV, F, B, LV
Bacterial Spores Mycobacteria Nonlipid Viruses Fungi Bacteria Lipid Viruses
Organism that is least resistant to killing:
A. Bacteria
B. Lipid Viruses
C. Nonlipid Viruses
Lipid Viruses
Organism that is most resistant to killing:
A. Mycobacteria
B. Bacterial Spores
C. Fungi
Bacterial Spores
Devices that invade sterile tissues; requires sterilization
Critical Materials
devices that come in contact with mucous membranes; require high-level disinfection
Semicritical Materials
Devices that come in contact with intact skin & requires intermediate-level to low-level disinfection
Noncritical Materials
High Level Disinfection… with or without…
Sporocidal
Tuberculocidal
With Sporocidal
Intermediate Level Disinfection… with or without…
Sporocidal
Tuberculocidal
With ttuberculocidal but not sporocidal
Low Level disinfection… with or without…
Sporocidal
Tuberculocidal
Without sporocidal and tuberculocidal
