Diagnosis and Management of Histoplasmosis Infections

Histoplasmosis is a fungal infection caused by inhalation of Histoplasma capsulatum spores, with a spectrum ranging from asymptomatic pulmonary colonisation to life-threatening disseminated disease. Clinical suspicion should be guided by epidemiological history, including residence in or travel to endemic regions, and exposure to bat or bird droppings. Diagnosis relies on a combination of imaging, fungal culture, histopathology, serology and antigen detection assays in urine or serum, which provide rapid sensitivity in disseminated cases. Molecular techniques, such as PCR and next-generation sequencing, are increasingly employed to enhance specificity and detect resistant strains. Management depends on disease severity: severe or disseminated infections warrant induction with amphotericin B formulations, followed by long-term itraconazole therapy, whereas mild to moderate pulmonary disease can often be treated with itraconazole alone. In immunocompromised patients, maintenance therapy and regular monitoring of drug levels are crucial to prevent relapse. Emerging approaches include point-of-care antigen assays and novel triazoles, offering improved access and tolerability. Global challenges remain in distinguishing histoplasmosis from tuberculosis in endemic areas, ensuring timely treatment and expanding diagnostic capacity in resource-limited settings.

Research from Nature Portfolio

No recent Nature Portfolio content available.

Diagnosis and Management of Histoplasmosis Infections publication trend

The graph below shows the total number of articles in diagnosis and management of histoplasmosis infections across all publications each year (not limited to Nature Index journals).

Technical terms

Antigen detection test: An assay that identifies specific fungal proteins in blood or urine to rapidly diagnose infection.

Disseminated histoplasmosis: A form of infection where the fungus spreads from the lungs to other organs, causing systemic illness.

Amphotericin B: A broad-spectrum polyene antifungal used as induction therapy for severe or disseminated disease.

Itraconazole: An oral triazole antifungal employed for mild to moderate infections and as maintenance therapy.

Whole-genome sequencing: A method to analyse the complete DNA sequence of an organism to study genetic diversity and epidemiology.

Species niche modelling: A computational technique to predict environmental suitability and geographic distribution of organisms.

SOFA score: A clinical tool for assessing the extent of organ dysfunction in critically ill patients.

References

1. Tracing histoplasmosis genomic epidemiology and species occurrence across the USA. Emerging Microbes & Infections (2024).
2. Factors related to mortality in critically ill histoplasmosis: a multicenter retrospective study in Guadeloupe and French Guyana. Annals of Intensive Care (2023).
3. Re-drawing the Maps for Endemic Mycoses. Mycopathologia (2020).