Abx Flashcards
Prophylaxis
Prevention of disease- taking abx before surgery or procedure to prevent infection
Empiric therapy
Treatment with abx before the specific organism has been identified
Definitve therapy
abx use based on identified organism
colonization
growth of microorganisms in a particular body site
infection
disease caused by microorganism
Contamination
introduction of pathogens into normally clean and sterile environment
bactericidal
capable of killing bacteria
bacteriostatic
inhibition or retardation of growth of bacteria with out their destruction
bactericidal drugs
Kill bacteria- peniciilans
Clavulanic acid
Beta lactam agonist- restores function of antibiotic by addressing resistance
Aminoglycosides- Mech of action
Ribosomal protein synthesis inhibitor- bacteriostatic- can be cidal with increased concentration
Aminoglycosides- Types
End in mycin- gentomycin, streptomycin, neomycin
Aminoglycosides- Spectrum of activity
Gram -Including Pseudomoas aerug- severeSynergistic with beta lactam for gram +
Beta Lactams
Penicillin, Cephalosporins, carbapenem & vancomycin
Penicillin- Mech of action
Inhibit cell wall synthesis leads to cell lysis
Penicillins- Names
End in cillin- penicillin G, ampicillin, amoxicillin
Penicillins- Uses
Gram +Streptococci
Peinicillin G, VK
Drug of choice for N Meningitis, syphilis
Ampicillin & amoxicillin
Gram +Extended spectrumRespiratory infectionsStreptococci, enterococci
Cephalosporins- mech of action
Beta lactam antibiotics- inhibit cell wall synthesis
1st generation cephalosporins
cephlexn, cefazolin
1st generation cephalosporin- spectrum of activity
Gram +: Strept, MSSA some Gram -: E.coli, Klebisselaskin & resp infections
2nd generation Cephalosporin- spectrum of activity
Gram +: Strept, MSSAGram - : Good coverage- B fragilis
2nd generation cephalosporin- drug names
cefuroxime, cefotetan, ceforitin
3rd generation cephalosporins- drug names
ceftriaxone, cefotaxime, ceftzidime
3rd generation cephalosporins- spectrum of activity
Resp & serious infectionsPenetrates CSFGram +: Strept, MSSAGram - Very good- pseudomonas
4th generation cephalosporins- drugs
cefepime
4th generation cehpalosporins- spectrum of activity
Gram +: Strept, MSSAGram - excellent- through Pseudomondas
Monobactam- mechanism of action
Disrupt cell wall synthesis- baceriacidal
Monobactam- drug
aztreonam
Monobactam- spectrum of activity
Gram -Up to pseudomondas
Carbapenem- mech of action
Beta lactam- disrupt cell wall synthesis
Carbapenem- Drugs
End in penem- imipenem
Vancomycin- Mech of action
Inhibits cell wall synthesis- beta lactam
Vancomycin- Spectrum of activity
Drug of choice for MRSAStrept, Staph, EnteroNo Gram -
Macrolides- drugs
erythromycin, clarithromycin, azithromycin
Macrolides- Mech of activity
Ribosomal inhibition- bacteriostatic
Macrolide- Spectrum of activity
Gram +Chlamydia & syphallisAtypical respiratory infections: Legionella, pneumoniae
Tetracyclines- Drugs
end in cycline- doxycycline, tetracycline, mincycline
Tetracycline- Mech of action
Ribosomal protein synthesis inhibitor- bacteriostatic
Tetracycline- spectrum of activity
Gram + strept & MSSAWeak Gram -A typical respiratory infections
Quinolones- Drugs
“floxacin”ciprofloxacin, norfloxacin
Quinolones- Mech of action
Inhibit DNA synthesis- bacteriostatic
Sulfa Drugs
Trimethoprim-sulfamethoxazole
Sulfa- Mech of action
Inhibit folic acid synthesis- formation of essential cofactor- bacteriostatic
Sulfa- Spectrum of activity
Gram + Strept, MSSAGram - Enterobacteriacae
Anaerobic agents
Clindamycin, metronidazole, chloramphenicol
Anaerobic- mech of action
Inhibition of ribosome- bacteriostatic