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9 Cards in this Set
- Front
- Back
sulfanomide
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bacteriostatic
inhibits PABA, which inhibits dihydrofolic synthesis which ultimately inhibits DNA synthesis. it is selective to bacteria because we do not synthesize folate, needed for PABA. used for UTI |
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Trimethoprim
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inhibits tetrahydrofolate synthesis, which stops DNA synthesis.
also selective to bacteria. used for UTI cannot be used during pregnancy/lactation |
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Sulfamethoxazole& Trimethoprim
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SMZ inhibits PABA and TMP inhibits dihydrofolic acid. they work synergistically.
used for UTI, bronchitis/pneumonia and pneumocystis jirovecii. |
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Resistance
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-destroy antibiotic
-decrease antibiotic uptake -increase antibiotic exit -alter antibiotic target site |
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selection pressure
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how use of antibiotics promotes bacterial resistance
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cross resistance
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if a bacterial strain is resistant to one class of drugs, it is often resistant to all drugs of that class
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multiple drug resistance
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if a bacterial strain is resistant to more than one type of antibiotic, it is said to exhibit multiple drug resistance.
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chromosomal resistance
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usually gives to 1 or 2 antibiotic resistance
but it is not transferable |
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plasmid resistance
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usually gives multiple >4 resistance and can be transferred to another bacteria
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