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Published on: February 15, 2011
Gastrointestinal histoplasmosis in patients with AIDS: case report and review
K N Suh1, T Anekthananon, P R Mariuz
1Infectious Diseases Unit, University of Rochester School of Medicine and Dentistry, Rochester, NY, USA.
Abstract:
Histoplasmosis is the most common endemic mycosis in individuals with AIDS, occurring in 2%-5% of this population. Infection is more likely to be disseminated than in immunocompetent individuals and generally presents insidiously with nonspecific symptoms. The gastrointestinal tract is involved in 70%-90% of cases of disseminated histoplasmosis, yet gastrointestinal histoplasmosis per se is infrequently encountered in patients with AIDS. The diagnosis of gastrointestinal histoplasmosis is often not suspected, particularly in areas of nonendemicity, and a delay in diagnosis may lead to increased morbidity and risk of death. Since antifungal therapy improves outcome for >80% of AIDS patients with histoplasmosis, it is essential that caregivers be aware of the varied presentations of gastrointestinal histoplasmosis in order to diagnose and to treat this potentially life-threatening infection effectively.
Insights
Histoplasmosis is a common fungal infection in people with AIDS, often spreading throughout the body. Early diagnosis and treatment of gastrointestinal histoplasmosis are crucial for better outcomes.
Area of Science:
- Medical Mycology
- Infectious Diseases
- Immunocompromised Hosts
Background:
- Histoplasmosis is the most frequent endemic mycosis in individuals with Acquired Immunodeficiency Syndrome (AIDS).
- Disseminated infection is more common in AIDS patients than in immunocompetent individuals.
- The gastrointestinal tract is frequently involved in disseminated histoplasmosis.
Observation:
- Gastrointestinal histoplasmosis is often underdiagnosed in patients with AIDS.
- Nonspecific symptoms and insidious presentation can delay diagnosis.
- Diagnosis is particularly challenging in non-endemic areas.
Findings:
- Gastrointestinal involvement occurs in 70%-90% of disseminated histoplasmosis cases.
- Gastrointestinal histoplasmosis as a primary presentation is rare in AIDS patients.
- Delayed diagnosis increases morbidity and mortality risk.
Implications:
- Awareness of varied gastrointestinal histoplasmosis presentations is vital for clinicians.
- Prompt diagnosis and treatment improve outcomes for over 80% of AIDS patients.
- Effective management of this potentially life-threatening infection is essential.
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Causative Organism
The primary infectious agent causing tuberculosis is Mycobacterium tuberculosis, a slow-growing, acid-fast, aerobic rod that exhibits sensitivity to heat and ultraviolet light. Instances of Mycobacterium bovis and Mycobacterium avium contributing to the development of TB infection are rare.
Mode of...
Fungal Phylum Microsporidia
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Toxoplasmosis
Giardiasis
Amebiasis

