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Updated: Jun 24, 2025
Measurement of Chitinase Activity in Biological Samples
Published on: August 22, 2019
Preliminary Evidence for the Role of Fungi, Specifically Chaetomium, in Gulf War Illness
John W Cherwonogrodzky1, Tzuyung D Kou2, Robert R Rennie3
1Biothreats Consulting Incorporated, Medicine Hat, Alberta T1A 8M3, Canada.
Introduction:
For veterans of the Persian Gulf War (1990-1991), dozens of possible causes for their illness have been proposed. We hypothesize that all may be correct. These may have weakened the immunity of the military personnel to fungal pathogens in the soil. These microbes, in turn, may have afflicted the veterans either directly by infection or indirectly by toxins.
Materials And Methods:
In 1990, the military (source confidential) provided the first author with soil samples from the Persian Gulf to determine if there were biothreats present. His team found that per gram of soil, there had few bacteria but many fungi. The National Centre for Human Mycotic Diseases (Edmonton) identified some of these fungi. They sent to the first author reference cultures of 12 pathogenic fungal species isolated from Canadian patients. Supernatant antigens of these fungi were used to assess if control and Gulf War Illness (GWI) patient sera had IgG antibodies against them.
Results:
Human sera were tested on pathogenic fungal supernatant antigens. Controls had low IgG titers against all 12 fungal sources. Gulf War Illness (GWI) patient sera had low IgG titers against 11 of the 12 fungal antigens. However, 12 of 28 GWI patient sera (43%, P ≤ .0002 compared to controls) had high IgG titers against one fungus, Chaetomium, supernatant antigen.
Conclusions:
We suggest that the military personnel in the Persian Gulf War (1990-1991) may have had their immunity weakened from a variety of causes. The role of pathogenic fungi and/or their supernatant antigens or toxins as a contributing factor to GWI should be further investigated.
Insights
Gulf War Illness (GWI) may be linked to fungal exposure. Researchers found higher antibody levels to a specific fungus, Chaetomium, in GWI patients compared to controls, suggesting a potential role for fungi in veteran health.
Area of Science:
- Mycology
- Immunology
- Environmental Health
Background:
- Persian Gulf War veterans (1990-1991) suffer from unexplained illnesses.
- Multiple environmental exposures have been proposed as causes for Gulf War Illness (GWI).
- A hypothesis suggests weakened immunity to fungal pathogens in soil may contribute to GWI.
Purpose of the Study:
- To investigate the potential role of soil fungi in Persian Gulf War Illness (GWI).
- To assess immune responses to pathogenic fungi found in Persian Gulf soil samples.
Main Methods:
- Soil samples from the Persian Gulf were analyzed for microbial content.
- Pathogenic fungi were identified, and their supernatant antigens were prepared.
- IgG antibody titers in sera from GWI patients and controls were measured against fungal antigens.
Main Results:
- Control sera showed low IgG titers against 12 pathogenic fungi.
- GWI patient sera exhibited low IgG titers against 11 of the 12 fungi.
- Significantly, 43% of GWI patients had high IgG titers against Chaetomium supernatant antigen (P ≤ .0002).
Conclusions:
- The findings suggest a potential link between fungal exposure and GWI.
- Chaetomium and its antigens/toxins warrant further investigation as contributing factors to GWI.
- Further research is recommended to explore the role of pathogenic fungi in veteran health.
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