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Antibiotics
first test
45
Microbiology
Graduate
09/17/2010

Additional Microbiology Flashcards

 


 

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Term
Penicillin V
Definition
Natural, kills Gram +/-, -Bactericidal with a narrow spectrum
-inactivated by β lactamase,
more stable than G
Term
Oxacillin
Definition
Gram (+), more acid stable, resistant to β lactamase
expand spectrum activity
toxic
Term
Penicillin G
Definition
Natural, kills Gram +/-, -Bactericidal with a narrow spectrum
-inactivated by β lactamase
Term
Nafcillin
Definition
Gram (+), more acid stable, resistant to β lactamase
-expand spectrum activity
-toxic
Term
methicillin
Definition
Gram (+), more acid stable, resistant to β lactamase
-expand spectrum activity
-toxic
Term
ampicillin
Definition
Gram(-)
-not P. aeruginosa,
penetrate outer membrane, extended spectrum
-effectiveness against Gram (+) weaken
-acid stable, sensitive to β lactamase
Term
Piperacillin
Definition
Anti Pseudomonal penicillin, Gram (+), (-), either not effective/somewhat effective against Gram (+), but highly effective against Gram (-) rods
-sensitive to β lactamase, administered parenterally
-toxic
Term
Ticarcillin
Definition
Anti Pseudomonal penicillin, Gram (+), (-), either not effective/somewhat effective against Gram (+), but highly effective against Gram (-) rods
-sensitive to β lactamase, administered parenterally
-toxic
Term
Clavulanic
Definition
binds to b-lactamase, an additive
Term
Sulbactam
Definition
binds to b-lactamase, an additive
Term
Tazobactam
Definition
binds to b-lactamase, an additive
Term
Cephalosporins
Definition
4 generations, each gets more and more broad the higher you go, prevents peptidoglycan synth.
Term
Vancomycin
Definition
Gram (+), inhibits cell wall synth, complex glycopeptide originally produced by Streptomyces orientalis
-used for patients allergic to β lactam antibiotics, MRSA
- Nephrotoxicity, Neurotoxicity, Ototoxic
Term
Bacitracin
Definition
Gram (+), cell wall synth, -polypeptide produced by Bacillus subtilis
-topical use
- Nephrotoxicity-if administered parenterally
Term
Polymyxin B
Definition
Gram (-) rods, detergent action, isolated from Bacillus polymyxa
-Pseudomonas aeruginosa
-used for Gram (-) rods not responding to other therapy
-used on external, localized infections
-bactericidal
-Nephrotoxicity
Term
Polymyxin E (colistin)
Definition
Gram (-) rods, detergent action, isolated from Bacillus polymyxa
-Pseudomonas aeruginosa
-used for Gram (-) rods not responding to other therapy
-used on external, localized infections
-bactericidal
-Nephrotoxicity
Term
tetracycline
Definition
Gram (+)
Gram (-)
Rickettsial,
-bone seeking drugs
stops synthesis of tRNA (30s subunit binding)
obtained from Steptomyces
-Bacteriostatic – broad spectrum
-intracellular bacteria and UTI pathogens, enterics
Term
doxycycline
Definition
Gram (+)
Gram (-)
Rickettsial,
-bone seeking drugs
stops synthesis of tRNA (30s subunit binding)
obtained from Steptomyces
-Bacteriostatic – broad spectrum
-intracellular bacteria and UTI pathogens, enterics
Term
demeclocycline
Definition
Gram (+)
Gram (-)
Rickettsial,
-bone seeking drugs
stops synthesis of tRNA (30s subunit binding)
obtained from Steptomyces
-Bacteriostatic – broad spectrum
-intracellular bacteria and UTI pathogens, enterics
Term
minocycline
Definition
Gram (+)
Gram (-)
Rickettsial,
-bone seeking drugs
stops synthesis of tRNA (30s subunit binding)
obtained from Steptomyces
-Bacteriostatic – broad spectrum
-intracellular bacteria and UTI pathogens, enterics
Term
Chloramphenicol
Definition
Gram (+)
Gram (-)
Aerobic and anaerobic
Stops 50s subunit binding
Bacteriostatic, broad spectrum
-restricted for treating typhoid fever, plague, rocky moutain spotted fever, penicillin resistant H. influenzae, meningococcal infections
- Hematotoxicity, Reversible aplastic anemia
Term
Erythromycin,
Definition
Gram (+)
Gram (-)
block initiation complex,
Broad spectrum, bacteriostatic
Term
Clarithromycin
Definition
Gram (+)
Gram (-)
block initiation complex,
Broad spectrum, bacteriostatic
Term
Azithromycin,
Definition
Gram (+)
Gram (-)
block initiation complex,
Broad spectrum, bacteriostatic
Term
Telithromycin
Definition
Gram (+)
Gram (-)
block initiation complex,
Broad spectrum, bacteriostatic
Term
rifampin
Definition
Rifamycins fam
Mycobacterium tuberculosis
-Gram (+) cocci aerobic,
inhibits RNA synth
given in combo with another antibiotic
-bactericidal
-Headache, Dizziness
Term
rifabutin
Definition
Rifamycins fam
Mycobacterium tuberculosis
-Gram (+) cocci aerobic,
inhibits RNA synth
given in combo with another antibiotic
-bactericidal
-Headache, Dizziness
Term
rifaximin
Definition
Rifamycins fam
Mycobacterium tuberculosis
-Gram (+) cocci aerobic,
inhibits RNA synth
given in combo with another antibiotic
-bactericidal
-Headache, Dizziness
Term
Levofloxacin
Definition
Quinolones
(Fluoroquinolone fam
Enterococci
Gram (-)
Aerobes,
inhibits uncoiling of DNA,
synthetic fluorinated analogs of nalidixic acid-broad spectrum antibiotics, bactericidal
-used for UTI
-Low toxicity
Term
norfloxacin
Definition
Quinolones
(Fluoroquinolone fam
Enterococci
Gram (-)
Aerobes,
inhibits uncoiling of DNA,
synthetic fluorinated analogs of nalidixic acid-broad spectrum antibiotics, bactericidal
-used for UTI
-Low toxicity
Term
ciprofloxacin
Definition
Quinolones
(Fluoroquinolone fam
Enterococci
Gram (-)
Aerobes,
inhibits uncoiling of DNA,
synthetic fluorinated analogs of nalidixic acid-broad spectrum antibiotics, bactericidal
-used for UTI
-Low toxicity
Term
Metronidazole
Definition
anaerobic bac, and protozoans,
narrow spectrum
treatment of intra-abdominal infections, vaginitis, antibiotic associated entercolitis, brain abscesses
-bactericidal
-Fever, Nausea
Term
Sulfamethoxazole
Definition
sulfonamide
Gram (+)
Gram (-),
competes with foliate synth
-broad spectrum, bacteriostatic
-used for uncomplicated UTIs, otitis media, abscesses
-Nausea, Rash
Term
Sulfisoxazole
Definition
sulfonamide
Gram (+)
Gram (-),
competes with foliate synth
-broad spectrum, bacteriostatic
-used for uncomplicated UTIs, otitis media, abscesses
-Nausea, Rash
Term
Sulfamerazine
Definition
sulfonamide
Gram (+)
Gram (-),
competes with foliate synth
-broad spectrum, bacteriostatic
-used for uncomplicated UTIs, otitis media, abscesses
-Nausea, Rash
Term
Trimethoprim
Definition
inhibits foliate synth, bacteriostatic, bactericidal
-used in combo with sulfamethoxazole to treat UTI, otitis media, respiratory tract infection, diarrhea (combo synergistic)
-Visual disturbances
Term
Dapsone
Definition
Leprosy bacillus, inhibits folic acid synthesis, sulfa drug, treat leprosy, usually in combo with other antimycobacterial drugs (rifampin and clofazimine)
-treat Pneumocystis carinii pneumonia
-bacteriostatic
-GI discomfort
Term
Isoniazid
Definition
Tuberculosis, bacillus
inhibits mycolic acid synth,
bactericidal against growing organisms, bacteriostatic against non replicating organisms
-Neurotoxicity, Hepatotoxicity
Term
Nystatin-Polyene
Definition
Candidiasis
GI fungal infections,
interact with sterols, topical, too toxic for systemic
Term
Amphotericin-Polyene
Definition
Systemic candidiasis, and exotic mycoses,
interacts with sterols,
Can be used IV
Considerable toxicity issues
Term
Miconazole
Definition
Fungi and some G(+) cocci, Blocks synthesis of ergosterol,
Oral gel or cream
Rarely find resistant strains of yeast
Term
Fluconazole
Definition
Blocks synthesis of ergosterol
Minor toxicity, Used as a prophylactic chemotherapy for HIV infected patients
Term
Itraconazole
Definition
Broader spectrum antifungal, includes Aspergillus, Blocks synthesis of ergostero, Does not penetrate CNS (not used for meningitis patients), has increased toxicity issues
Term
Echinocandins
Definition
Used in systemic candidiasis and aspergillosis, block cell wall in fungi,
Penicillin of antifungals
Term
Terbinafine
Definition
Dermatophyte infections, Blocks synthesis of ergosterol
Topical or tablet. Increased toxicity when used in tablet form
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