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Published on: May 13, 2015
Risk Factors for Disseminated Coccidioidomycosis, United States
Abstract:
Of 150,000 new coccidioidomycosis infections that occur annually in the United States, ≈1% disseminate; one third of those cases are fatal. Immunocompromised hosts have higher rates of dissemination. We identified 8 patients with disseminated coccidioidomycosis who had defects in the interleukin-12/interferon-γ and STAT3 axes, indicating that these are critical host defense pathways.
Insights
Coccidioidomycosis can disseminate in about 1% of infections, especially in immunocompromised individuals. Defects in interleukin-12/interferon-γ and STAT3 pathways were identified as critical in disseminated coccidioidomycosis.
Area of Science:
- Mycology
- Immunology
- Infectious Diseases
Background:
- Coccidioidomycosis is a fungal infection endemic to the southwestern United States.
- Approximately 150,000 new cases occur annually in the US, with about 1% disseminating.
- Disseminated coccidioidomycosis has a high fatality rate, particularly in immunocompromised hosts.
Purpose of the Study:
- To investigate the host immune pathways involved in disseminated coccidioidomycosis.
- To identify genetic or functional defects contributing to disease dissemination.
Main Methods:
- Case study of 8 patients with disseminated coccidioidomycosis.
- Analysis of immune system components, focusing on the interleukin-12/interferon-γ and STAT3 signaling pathways.
Main Results:
- All 8 patients exhibited defects in the interleukin-12/interferon-γ axis.
- Defects in the STAT3 pathway were also observed in these patients.
- These findings suggest a crucial role for these pathways in controlling coccidioidomycosis dissemination.
Conclusions:
- The interleukin-12/interferon-γ and STAT3 signaling pathways are critical for host defense against disseminated coccidioidomycosis.
- Identifying these defects may lead to targeted therapies for high-risk individuals.
- Further research is warranted to elucidate the precise mechanisms of these immune defects.
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