Antimicrobial chemotherapy Flashcards
What are common penicillins?
Benzylpenecillin Amoxicillin Flucloxacillin Co-amoxiclav Peperacillin
Broad spectrum
What are common cephalosporins?
Cefradine Cefuroxime Ceftriazone Ceftazidime Ceftaroline
UTI’s and hospital acquired infections
What are common aminoglycosides?
Gentamicin
Gram negative
What are common macrolides?
Claritromycin
Erythromycin
Azithromycin
In STD’s
What are some quinolones?
Ciprofloxacin
Levofloxacin
Gram negatives in pneumonia
What are some glycopeptides?
Vancomycin and teicoplanin
Gram positives in MRSA and patients allergic to penicillins
What are some other antibiotics used?
Trimethoprim = negative UTI’s
Co-trimoxazole = BS in resp infections
Clindamycin, tetracycline, rifampicin, metranidazole
linezolid, daptomycin = 2nd line MSSA and MRSA and VRE
What are the principles of prescribing?
Therapy = empiric or directed
Prophylaxis = primary or secondary
Patient characteristics - age, renal and liver function and allergies
Antimicrobial selection
What is MRSA?
Methicillin is a penicillinase resistant to penicillin
MRSA has an altered PBP mutation
Resistant to flucloxacillin
What is VRE?
Vancomycin resistant enterococci
VRE are only sensitive to 1 or 2 antibiotics
What is ESBL producing enterobacteraciae?
Resistant to beta-lactam antibiotics
What is CPE?
Carbapenem producing enterobacteriacae
Multiply resistant bacteria
Only sensitive to a few antibiotics of last resort
What is type 1 Hypersensitivity reaction?
IgE mediated = pro inflammatory release = bronchospasm and circulatory collapse
What is type 2 Hypersensitivity reaction?
Beta lactem specific IgG or IgM antibodies bind to RBC = haematological reactions or interstitial nephritis
What is type 3 hypersensitivity reaction?
Beta lactem specific IgG or IgM antibodies bind to beta-lactem antigens = serum sickness and drug related fever