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56 Cards in this Set
- Front
- Back
Chemotherapy
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Treatment of systemic infections with specific drugs that selectively suppress the infecting microorganism without significantly affecting the recipient
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Cell Wall Antimicrobials (3)
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Beta lactam drugs,
Vancomycin, Bacitracin |
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Nucleic Acid Synthesis Antimicrobials (2)
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Flouroquinolones
Rifamycins |
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Metabolic Pathways Antimicrobials (3)
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Sulfonamide
Trimethoprim Pyrimethamine |
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Protein Synthesis Antimicrobials (7)
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Aminoglycosides
Tetracyclines Macrolides Chloramphenicol Lincosamides Oxazolidinones Streptogramins |
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Beta lactam drugs (4)
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Penicillin
Cephalosporin Carbapenems monobactam |
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What does penicillin bind to?
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Transpeptidase/penicillin binding proteins
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What does transpeptidase/penicillin binding proteins do?
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Cross-links peptidoglycan chains to form rigid cell wall
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What happens when penicillin binds to the PBP's?
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Loss of cell rigidity and cell death (bactericidal)
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Penicillin is particularly effective against which bacteria?
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Gram positive bacteria with thick cell walls
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MRSA and penicillin resistant pneumococci utilize what mechanism of resistance?
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alteration of penicillin binding proteins
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Staphylococci has what major mechanism of resistance?
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Penicillinase/Beta lactamase to break beta lactam ring in penicillin
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Which gram-negative bacteria has reduced permeability of the cell membrane as a mechanism of resistance?
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Pseudomonas
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Narrow spectrum penicillinase susceptible antimicrobials?
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Penicillin G (parenteral) Penicillin V (oral)
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Which bacteria are susceptible to Narrow spectrum penicillinase susceptible antimicrobials?
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Streptococci
Pneumococci Meningicocci Treponum pallidum (syphillis) |
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Which bacteria are susceptible to Narrow spectrum penicillinase resistant antimicrobials?
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Staph, except MRSA
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Narrow spectrum penicillinase resistant antimicrobials?
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Oxacillin
Methicillin Naficillin |
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Broad spectrum penicillinase susceptible antimicrobials?
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Amoxicillin
Ampicillin |
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Which bacteria are susceptible to Broad spectrum penicillinase susceptible antimicrobials?
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Gram (+) cocci
Listeria monocytogenes H. pylori H. influenza |
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Extended spectrum or antipseudomonal penicillinase susceptible antimicrobials?
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Ticarcillin
Piperacillin Azlocillin |
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Bacteria susceptible to antipseudomonal penicillinase susceptible antimicrobials?
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Pseudomonas aeruginosa
Gram (-) rods |
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What is administration of Penicillin G and why?
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I.M/I.V. due to acid lability
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How is Penicillin G + Procaine and Benzathine helpful in meningicocci infections?
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Only penetrate CSF to a significant extent during inflammation
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How is Penicillin disposed of in the body?
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Activce tubular excretion
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What inhibits the elimination of Penicillin, how, and what effects does it have on Penicillin?
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Probenicid inhibits Penicillin by competition of the carrier and causes increased concentration of Penicillin as well as prolonging the activity of Penicillin
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What are the uses of Penicillin G (3) ?
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Streptococci, Meningococci, Gram (+) bacilli infections
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What is the DOC for Treponema pallidum?
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Penicillin G
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What bacteria are resistant to Penicillin G (3) ?
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Staph aureus, Neisseria gonorrhea, some strains of Pneumococci
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Which drugs inhibit beta lactamases?
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Methicillin
Oxacillin Naficillin |
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Beta lactamase inhibitors are used for which bacterial infection?
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Staph infections
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MRSA MRSE?
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Methicillin Resistant Staph Aureus and Methicillin Resistant Staph Epidermides
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Patient with peptic ulcers goes in for dental surgery. Two years ago had prosthetic valves put into heart. Patient is at risk for? DOC?
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Patient is at risk for endocarditis. Should use Amoxicillin prophylactically before surgery as well as to treat H.pylori infection (ulcers).
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Ampicillin and Amoxicillin can have broader spectrums by using in conjunction with which drugs (2) ?
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Clavulonic Acid
Sulbactam |
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What drug has a synergistic affect against enterococcal and pseudomonal infections?
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Aminoglycosides in addition to the Piperacillin or Ticarcillin will have a synergistic affect.
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Prophylactic treatment of rheumatic fever?
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Benzathine Penicillin
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Prophylactic treatment of gonorrhea and syphillis?
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Procaine- or Benzathine- Penicillin
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Amoxicillin or ampicillin is indicated for prophylaxis in what conditions?
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cyanotic heart disease, previous diagnosis of endocarditis, prosthetic heart valves before undergoing genitourinary/GI/respiratory/dental procedures
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Why do beta lactamase inhibitors widen the spectrum of antimicrobials?
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Because they are potent and irreversible beta lactamase inhibitors and do not have antibacterial properties.
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Uses of beta lactamase inhibitors?
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staph, H. influenza, N. gonorrhea, E.coli, Proteus
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Fixed dose beta lactamase inhibtors + penicillins (3)
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Amoxicillin/Ticarcillin + clavulonic acid
Ampicillin + Sulbactam Piperacillin + Tazobactum |
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Maculopapular rash, diarrhea, pseudomembranous enterocolitis
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Adverse effect of Ampicillin
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Interstitial nephritis
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Adverse effect of Methicillin
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Urticarial skin rashes, acute anaphylaxis, cross-hypersensitivity
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Adverse effect of penicillins
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First generation Cephalosporins (2) ?
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Cefazolin (parenteral)
Cephalexin (oral) |
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Uses of first generation cephalosporins (2) ?
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Klebsiella pneumonia
Surgical prophylaxis (cefazolin) |
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Spectrum of First generation Cephalosporins (2) ?
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Klebsiella pneumoniae
Gram (+) cocci |
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Second generation Cephalosporins (5)?
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Cefoxitin
Cefotetan Cefaclor Cefamandole Cefuroxime |
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Second generation Cephalosporins enter CSF (1) ?
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Cefuroxime
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Spectrum of Second generation Cephalosporins (1) ?
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Gram (-) bacteria
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Second generation Cephalosporins for Bacteroids fragilis (2)?
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Cefoxitin
Cefotetan |
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Second generation Cephalosporins for H.influenza?
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Cefuroxime
Cefachlor Cefamandole |
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Third generation Cephalosporins (5) ?
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Cefotaxime
Ceftriaxone(IM) Ceftazidime Cefoperazone Cefixime (oral) |
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Third generation Cephalosporins properties (2) ?
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Increased activity against Gram (-) bacteria.
Good penetration into BBB (except Cefoperazone & Cefixime) |
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Third generation Cephalosporins for Pseudomonas (2)?
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Cefoperazone
Ceftazidime |
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Third generation Cephalosporins for gonorrhea (2)?
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Ceftriaxone (parenteral) & Cefixime (oral)
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Third generation Cephalosporins for S. typhi (2)?
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Cefriaxone, cefaperazone
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