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An agent used to reduce the number of bacteria on a toilet would most accurately be called:
In a test tube filled with liquid, where to microaerophiles hang out?
in the middle; they require (love) a little bit of oxygen
In a test tube filled with liquid, where do the facultative anaerobes hang out?
mostly toward the surface, but they are spread throughout; they do not required oxygen, but they can live in its presence
In a test tube filled with liquid, where do the obligate aerobes hang out?
at the surface; they require oxygen
In a test tube filled with liquid, where do the obligate anaerobes hang out?
at the bottom; they cannot tolerate oxygen
What is treatment intended to lower microbial counts on eating and drinking utensils to safe public health levels?
What is removal or destruction of all living organisms, including endospores (except prions)
T/F: Filtration methods are used to count bacteria in very low concentration, such as in lakes or streams
In what way are semisynthetic penicillins and natural penicillins alike?
Both are based on Beta-lactam
One effect of washing regularly with antibacterial agents is the removal of normal microbiota. This can result in:
increased susceptibility to disease
The science that deals with when diseases occur and how they are transmitted is called:
Symptoms of disease differ from signs of disease in that symptoms are:
changes felt by the patient/subjective
To date, most of our natural antibiotics have been found to be produced by members of what genus?
What does this statement refer to: Some bacterial mutants modify the porin opening so that antibiotics cannot enter the periplasmic space
What does this statement refer to: Gram-negative bacteria expels antibiotics to prevent them from reaching an effective concentration
efflux of antibiotic
What does this statement refer to: Minor modifications at this site can neutralize the effects of antibiotics
alteration of target molecule
What does this statement refer to: Uses Beta-lactamase to breakdown the beta-ring
inactivation by enzymes
What contributes to postoperative infections?
normal microbiota of operating room staff, using syringes more than once, errors in aseptic techniques, antibiotic resistance
In which of the following patterns of disease does the patient experience no signs or symptoms?
incubation and convalescence
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