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11 Cards in this Set
- Front
- Back
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Describe Bauer-Kirby test. |
Uses antibiotic impregnated wafers to test whether bacteria are affected by the antibiotic |
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Explain significance of colonies observed growing in the zone of inhibition in a Bauer-Kirby test. |
The size of the zone of inhibition indicates the sensitivity of bacteria to a drug |
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What is the broth method for determining minimum inhibitory concentration? (MIC) |
It determines the lowest concentration of an antimicrobial drug that will inhibit the growth of a microorganism |
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List three factors that can influence the accuracy test |
Phase of organism growth, broth or agar medium, inoculum size |
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When performing a broth dilution test why do a growth control tube? A sterility control tube? |
To tell if the bacteria actually grew and to see if the broth was already contaminated |
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How can minimum bactericidal concentration of an antimicrobial agent be determined from an MIC assay? |
By sub culturing to agar played that don't contain the test agent |
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Could an organism that is suseptible to an antimicrobial agent in laboratory testing fail to respond to it when that drug is used to treat the patient? |
Yes if the organism didn't react to the drug very much |
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Are antibacterial agents useful in viral infections? |
No because they are only used to fight bacterial infections |
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Why is is better to use suseptible rather than sensitive describing an organisms response to a drug? What does drug sensitivity mean? |
Susceptible is used to describe the affects an antibiotic has on the growth of an organism. Drug sensitivity means the reaction a patient has to a drug. |
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Describe a mechanism of bacterial resistance to antimicrobial drugs. |
Inhibition of protein synthesis can resist antobiotics |
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What are 3 actions that could prevent antibiotic resistance? |
Using the right antibiotic, take them as prescribed, don't take other people's |
