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14 Cards in this Set
- Front
- Back
Describe the spectrum of activity of Fluconazole.
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All species of Candida are susceptible to Fluconazole except Glabrata which is Susceptible but Dose Dependent to resistant to Fluconazole.
Kruisei is also resistant to Fluconazole |
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Voriconazole, Posaconazole?
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Vori and Posoconazole cover all species of Candida except Glabrata which shows a dose dependent susceptibility to resistance to these agents
**First line for C. Albicans is Fluconazole! **First line for Aspergillosis is Voriconazole! |
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Describe the metabolism of the three azole agents
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Fluconazole and Voriconazole are metabolized by the CYP450 system.
Posaconazole is metabolized by the UDP system via glucuronidation |
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How is each azole eliminated?
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Fluconazole - Renally
Voriconazole - Hepatically Posaconazole - Fecally Fluconazole needs to be renally dose adjusted Voriconazole needs to Hepatically dose adjusted |
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What is each class of anti-fungal active against?
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Polyenes (Amphotericin) - Active against Most candida, aspergillus and zygomycetes
Echinocandins - Active against most candida species and aspergillosis Flucytosine - Active against candida and cryptococcus |
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What drug is good to give as empiric therapy for a likely Candida infection?
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Caspofungin - It covers all Candida species and can be given regardless of CrCl
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What are the 3 types of Candida Infection?
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Candidemia
Mucocutaneous Candiduria |
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What is the preferred treatment for each?
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Fluconazole, Echinocandin
Fluconazole, Clotrimazole, Nystatin Fluconazole, Remove catheter Second line is typically Amphotericin and treatment is typically for 14 days |
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If you find out that the pathogen is susceptible to azoles, what is your course of action?
What do you do if the pathogen is intermediate or resistant to azoles? |
De-escalate from the echinocandin and choose the more narrow spectrum azole
Continue the echinocandin and consider a higher dose of the azole. |
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What is prophylaxis for Aspergillosis?
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Voriconazole
Posaconazole |
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What is the preferred treatment for Aspergillosis neutropenic fever.
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Voriconazole (if not used for prophylaxis)
Amphotericin Echinocandins |
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What is the preferred treatment for Aspergillosis invasion pulmonary/sinus infection?
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Voriconazole
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What is your course of action if the patient has confirmed Aspergillosis?
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Voriconazole
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What is your course of action is Aspergillosis vs. Zygomycetes is suspected but not confirmed?
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Use Posaconazole or Amphotericin
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