Antimicrobial Therapy Flashcards
What are pros to appropriate use of antibiotics?
Improves patient outcome, helps prevent antimicrobial resistance, prevents suppression of resident microflora and intestinal dysbiosis
When is prophylactic antibiotic administration beneficial?
- Contaminated wounds
- Surgical procedures with expected contamination
- Surgery in immunosuppressed patients
- Severely neutropenic patients
- Prolonged surgical procedures
What should be considered when selecting antibiotics?
- What type of bacteria is most likely present?
- Which types of antibiotics will reach therapeutic concentrations in the tissue of interest?
- What are the side effects associated with these antibiotics?
- Can the antibiotic be given as prescribed?
What are the considerations when prescribing antibiotics?
- Route of administration
- Frequency
- Dosage and volume
- Formulation
- Duration
- Cost
Name some examples of beta-lactams
Penicillins, cephalosporins, monobactams, and carbapenems
What is the primary mechanism for resistance with beta-lactams?
Bacterial production of beta-lactamase
Penicillins are effective against which bacteria?
Gram positive aerobic bacteria and anaerobic bacteria
What are the two beta-lactamase inhibitors?
Clavulanate and sulbactam
Cephalosporins are most effective against what kind of bacteria (for 1st and 3rd gen)?
1st: Gram positive aerobic bacteria
3rd: Gram negative aerobic bacteria
What are side effects of beta-lactams?
- V/D and anorexia
- Hypersensitivity (hives, swelling, fever, etc)
Name some examples of aminoglycosides
Neomycin, streptomycin, gentamicin, amikacin, tobramycin
Aminoglycosides are effective against what type of bacteria?
Gram negative aerobic bacilli (e. Coli, klebsiella, pseudomonas, enterobacter)
When should Aminoglycosides NOT be used?
For abscesses or granulomatous infections
What are two side effects of aminoglycosides?
Nephrotoxicity and ototoxicity
What are some examples of fluoroquinolones?
Enrofloxacin, marbofloxacin, orbifloxacin, ciprofloxain