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Histoplasmosis: a clinical and laboratory update
1Infectious Diseases Division, Department of Internal Medicine, Ann Arbor Veterans Affairs Healthcare System, University of Michigan Medical School, Ann Arbor, MI, USA. ckauff@umich.edu
Clinical Microbiology Reviews
|January 16, 2007
Summary
Histoplasma capsulatum infection is common in certain regions, but severe disease is rare. Diagnosis and treatment have advanced, with azoles like itraconazole being preferred for mild to moderate histoplasmosis.
Area of Science:
- Mycology
- Infectious Diseases
- Immunology
Background:
- Histoplasma capsulatum infection is endemic in the Midwestern US and Central America.
- Symptomatic disease is infrequent, with severity dependent on inhaled dose and host immunity.
- Pulmonary infection ranges from mild pneumonitis to severe respiratory distress.
Purpose of the Study:
- To review the clinical manifestations, diagnosis, and treatment of histoplasmosis.
- To highlight advancements in diagnostic accuracy and therapeutic strategies.
Main Methods:
- Review of existing literature on Histoplasma capsulatum.
- Analysis of diagnostic methods including antigen assays, serology, and culture.
- Evaluation of current treatment guidelines and drug efficacy.
Main Results:
- Histoplasmosis presents primarily as pulmonary infection, but dissemination can occur, especially in immunocompromised individuals.
- Urine antigen assays improve diagnostic accuracy.
- Amphotericin B is reserved for severe cases, with azoles, particularly itraconazole, being the preferred treatment for mild to moderate disease.
Conclusions:
- Histoplasmosis management has evolved, emphasizing early diagnosis and targeted therapy.
- Itraconazole is a key agent in treating various forms of histoplasmosis.
- Understanding host immune function is critical for predicting disease severity.
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