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Broth Microdilution In Vitro Screening: An Easy and Fast Method to Detect New Antifungal Compounds
Published on: February 14, 2018
[Therapy of candidiasis and cryptococcosis in AIDS]
1Klinikum, J.W. Goethe-Universität Frankfurt am Main, BR Deutschland.
Abstract:
Fungal infections figures large in HIV-infected patients. Candida infections of the mucous membranes belong to the main manifestations of immunodeficiency in HIV infection. For therapy and prophylaxis of oropharyngeal candidosis mainly systemically acting azoles as ketoconazole, fluconazole and itraconazole are applied; antimycotics to be administered topically regularly fail to act in patients with progressing disease. Ketoconazole tablets were used with good success in previous years of the AIDS epidemics. Application of ketoconazole in liquid formulation led to a significant increase in efficacy. Subsequently fluconazole proved to be a triazole with evidently better pharmacological properties leading to good clinical efficacy. Presently it represents the drug of first choice in acute and maintenance therapy of recurrent oropharyngeal and oesopharyngeal candidosis. In the case of therapy failure with fluconazole the administration of itraconazole in liquid cyclodextrine formulation can replace or at least delay the administration of amphotericin B plus flucytosine, a therapy rich in toxic side effects. The standard therapy of disseminated cryptococcosis--particularly of cerebral manifestation--is still the administration of amphotericin B combined with flucytosine. Alternative drugs are represented by fluconazole and itraconazole. However, an azole monotherapy seems to be legitimate only in primary cryptococcosis of the lungs or in early stages of secondary extrapulmonary infection. Cryptococcal meningitis requires an intense initial therapy. New therapy strategies were developed combining azoles with standard antimycotic drugs. The value of amphotericin B in liposomal or lipid complex formulations is still undetermined due to the up to now low number of AIDS patients treated.(ABSTRACT TRUNCATED AT 250 WORDS)
Insights
Fungal infections like candidiasis are common in HIV patients. Azoles such as fluconazole are effective treatments, with newer formulations offering improved efficacy and delayed need for toxic alternatives.
Area of Science:
- Mycology
- Infectious Diseases
- Pharmacology
Context:
- Fungal infections, particularly Candida infections, are significant manifestations of immunodeficiency in Human Immunodeficiency Virus (HIV)-infected patients.
- Topical antifungals are often ineffective in patients with progressive disease, necessitating systemic treatments.
- Previous treatments included ketoconazole, with liquid formulations showing increased efficacy.
Purpose:
- To review the therapeutic strategies for fungal infections in HIV-infected patients.
- To compare the efficacy and properties of various antifungal agents.
- To discuss current and alternative treatment options for oropharyngeal candidiasis and cryptococcosis.
Summary:
- Systemically acting azoles (ketoconazole, fluconazole, itraconazole) are primary treatments for oropharyngeal candidiasis in HIV patients.
- Fluconazole is the current first-choice agent due to its pharmacological properties and clinical efficacy.
- For fluconazole treatment failures, itraconazole may delay the need for toxic amphotericin B and flucytosine; standard cryptococcosis therapy remains amphotericin B with flucytosine, though azoles are alternatives.
Impact:
- Highlights the evolution of antifungal therapy in HIV infection, emphasizing the role of azoles.
- Provides guidance on selecting appropriate antifungal agents based on clinical efficacy and patient status.
- Suggests potential alternative strategies for managing refractory fungal infections in this vulnerable population.
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Mode of...
Fungal Phylum Microsporidia
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