Chapter 7 – Microbiology (100% correct)

which microbial structures do antimicrobial agents target? correct answers cell wall - prevent cell from bursting PM - permeability DNA - proteins and enzymes what factors determine whether an antimicrobial is effective? correct answers time of exposure cell wall type concentration of microbes concentration of antimicrobial temperature why can certain milk proudcts and fruit juices be stored as RT and not spoil? correct answers they go under UHT (ultra high temperature) or steam sterilization correct answers removal or destruction of all forms of microbial life heating is the most common form (dry/moist) commercial sterilization correct answers limited heat treatment used in canned food processing kills endospores of clostridium botulinum (obligate anaerobe) disinfection correct answers - destruction of vegatative (non-endospore forming) microorganisms that may be harmful - may involve chemicals, UV light, steam, boiling water includes antiseptic antiseptic correct answers a disinfectant that is used on living tissue ex. hydrogen peroxide, hand sanitizer, iodine, mouth wash, baby wipes. degerming correct answers removal of microbes from a limited region generally involves mechanical removal sanitization correct answers lower microbial counts on eating utensils high temperature washing or chemical disinfectant naming of treatments for microbial control correct answers -cide (to kill) -stat/stasis (stop/steady) limit growth - bacteriostatic sepsis/aseptic correct answers microbial contamination free of microbial contamination the more microbes, the _______ treatment time is required to eliminate correct answers longer enviornmental influences correct answers organic matter mixed with microbes lowers antimicrobial activity. ex- biofilms