Bacterial Growth & Control of Bacterial and Fungal Growth Flashcards
describe how temperature can influence bacterial growth
describe how the amount of water can restrict microbial growth
describe the presence of superoxide dismutase and catalase in certain groups of microbes
give examples for oxygen requirements (obligate aerobe, facultative aerobe, microaerophilic, obligate anaerobe)
describe the growth requirements for bordetella pertussis, haemophilus sp., and legionella sp.
describe what macronutrients are used for in bacteria (C, O, N, H, P, S)
describe most resistance vs most susceptible microorganisms
describe antisepsis, disinfection and sterilization
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antisepsis: destruction or inhibition of microorganisms in or on living tissue
- e.g. skin or mucous membranes
- disinfection: reduction of the number of viable microorganisms on or in a product or surface to a level previously specified as appropriate
- sterilization: a process that ensures a surface or product is free from viable microorganisms
describe common physical methods, gas vapor methods and liquid chemical methods used in healthcare settings for sterilization/disinfectants
describe sterilization techniques and their mechanism of action
when would sterilization be used in a healthcare setting?
- eliminate microorganisms from solutions
- eliminate microorganisms from surgical instruments prior to invasive procedures
- treat body fluids, used surgical instruments, etc.
when would disinfectant be used in a healthcare setting?
- control health-care associated infxns
- limit patient exposure to contaminated surfaces
- reduce microbial load on contaminated equipment (body fluids, secretions, blood, etc.)
when woudl an antiseptic be used in a healthcare setting?
- reduce microbial load on healthcare worker:
- surgical handscrubs/soaps/lotions
- reduce microbial load on patient skin or mucous membranes prior to invasive procedures
- clean minor wounds or skin abrasions
