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Related Experiment Video

Updated: Mar 12, 2026

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Is Cryptococcus gattii a Primary Pathogen?

Kyung J Kwon-Chung1, Tomomi Saijo2

  • 1Molecular Microbiology Section, Laboratory of Clinical Infectious Diseases, National Institutes of Allergy and Infectious Diseases, NIH, Bethesda, MD 20892, USA.

Journal of Fungi (Basel, Switzerland)
|January 1, 2015
PubMed
Summary
This summary is machine-generated.

Cryptococcus gattii meningoencephalitis may affect immunocompetent individuals with hidden immune dysfunction. Neutralizing antibodies against granulocyte-macrophage colony-stimulating factor (GM-CSF) may predispose healthy people to C. gattii infections.

Keywords:
CryptococcosisCryptococcus gattiianti-GM-CSF autoantibodiesimmune dysfunction

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Area of Science:

  • Immunology
  • Infectious Diseases
  • Neurology

Background:

  • Cryptococcal meningoencephalitis is caused by Cryptococcus neoformans (opportunistic) and Cryptococcus gattii (primary pathogen).
  • C. gattii infections are typically reported in immunocompetent individuals, unlike C. neoformans infections in immunocompromised patients.
  • Granulocyte-macrophage colony-stimulating factor (GM-CSF) is crucial for immune response and monocyte differentiation.

Purpose of the Study:

  • To review the link between GM-CSF neutralizing antibodies and C. gattii infection risk.
  • To investigate the prevalence of hidden immune dysfunction in apparently immunocompetent C. gattii patients.
  • To highlight the importance of immunological evaluation in C. gattii meningoencephalitis cases.

Main Methods:

  • Review of recent reports and epidemiological findings.
  • Analysis of the role of GM-CSF in immune response.
  • Discussion of diagnostic challenges for anti-GM-CSF autoantibodies.

Main Results:

  • GM-CSF neutralizing antibodies were found in apparently immunocompetent C. gattii patients.
  • Lack of GM-CSF function can predispose healthy individuals to C. gattii infection.
  • Standard immunological profiling often misses GM-CSF related immune dysfunction.

Conclusions:

  • Many "immunocompetent" C. gattii patients may have underlying immune deficiencies.
  • Testing for anti-GM-CSF autoantibodies is crucial for accurate diagnosis and risk assessment.
  • Understanding GM-CSF's role is key to managing C. gattii CNS infections.