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Cryptococcal meningitis: diagnosis and treatment
1Istituto di Igiene e Medicina Preventiva, Ospedale Maggiore, Università degli Studi di Milano, Via F. Sforza 35, 20122 Milano, Italy.
Abstract:
In the last decade, largely due to the increasing number of immunocompromised patients, particularly those with AIDS, there has been a dramatic increase in the incidence of cryptococcosis. The majority of human cryptoccoccal infections are caused by C. neoformans. Pulmonary cryptococcosis is the commonest form of infection and meningitis is the most severe, being fatal in most cases. Diagnosis is usually by culture and/or serology. Combined therapy with amphotericin B and flucytosine remains the initial treatment of choice, although a short course of amphotericin B alone followed by high dose fluconazole or itraconazole and the combination of flucytosine with fluconazole or with itraconazole may be effective alternatives. Both azoles, given as single agent maintenance therapy, have been shown to be beneficial as they are more effective and less toxic than the weekly infusion of amphotericin B. Primary prophylaxis with fluconazole has been advocated but problems of resistance are a concern. To date, itraconazole has not been associated with problems of resistance.
Insights
Cryptococcosis incidence is rising due to immunocompromised patients. Itraconazole is a safe and effective treatment option, unlike fluconazole, which raises concerns about resistance.
Area of Science:
- Medical Mycology
- Infectious Diseases
- Immunocompromised Host Research
Background:
- Rising incidence of cryptococcosis, particularly in immunocompromised individuals like those with AIDS.
- Cryptococcus neoformans is the primary causative agent of human cryptococcal infections.
- Pulmonary cryptococcosis is common, while meningitis represents the most severe and often fatal form.
Purpose of the Study:
- To review the current understanding of cryptococcosis, focusing on diagnosis and treatment.
- To evaluate the efficacy and safety of various therapeutic options, including azoles.
- To address concerns regarding antifungal resistance in cryptococcosis management.
Main Methods:
- Literature review of cryptococcosis incidence, diagnosis, and treatment modalities.
- Analysis of clinical outcomes associated with different antifungal therapies.
- Assessment of antifungal resistance patterns, particularly with azole agents.
Main Results:
- Combined amphotericin B and flucytosine is the initial treatment of choice.
- Azoles (fluconazole, itraconazole) offer effective alternatives and maintenance therapy, with lower toxicity than amphotericin B.
- Itraconazole shows promise as maintenance therapy without associated resistance issues, unlike fluconazole.
Conclusions:
- Effective management of cryptococcosis relies on timely diagnosis and appropriate antifungal therapy.
- Azole antifungals, especially itraconazole, are valuable for maintenance therapy due to efficacy and safety profiles.
- Careful consideration of antifungal resistance is crucial, highlighting itraconazole's advantage in this regard.
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