Diagnostic Code 6331 · 38 CFR §4.88b
Q fever is caused by Coxiella burnetii, a highly infectious bacterium found in livestock. Veterans who served near livestock in Iraq, Afghanistan, and other areas are at elevated risk. Q fever can become chronic, causing endocarditis and debilitating chronic fatigue syndrome. The VA uses the General Rating Formula. Residuals including chronic hepatitis, endocarditis, osteomyelitis, post-Q fever chronic fatigue syndrome, and vascular infections are rated under appropriate body system codes.
| Rating | Criteria |
|---|---|
| 100% | Active Q fever with confirmed serology and systemic symptoms during treatment, or chronic Q fever with ongoing complications. |
| 0% | Resolved. Residuals including chronic hepatitis, endocarditis, osteomyelitis, post-Q fever chronic fatigue syndrome, and vascular infections are rated under relevant body system codes. |
Serological testing showing Coxiella burnetii antibodies (phase I and phase II). Deployment records to livestock-endemic areas. Treatment records. Echocardiogram for chronic Q fever. Documentation of chronic fatigue.
Q fever is associated with Gulf War service and post-Q fever fatigue syndrome shares many Gulf War illness symptoms. Testing for Q fever antibodies may strengthen a disability claim.
Acute Q fever is flu-like and usually resolves. Chronic Q fever develops months or years later, most dangerously affecting heart valves. Different antibody patterns distinguish them.