Getting patients well, keeping them well, and focusing on a cure
Do I Have CGD?
After Being Diagnosed
General Information about CGD
Support for Parents/Patients
Doctor Visits & Hospitalizations
Specific Infecting Organisms
Specific Disease Help
Your Time in the Hospital
Updates on CGD Patients (2011)
Updates on CGD Patients (2013)
Professional PID Links
Contact & Nonprofit Info
Do I have CGD?
Warning Signs That You May Have CGD
Keep in mind that CGD is very rare—consult your doctor.
How does CGD differ from other primary immune deficiencies (PIDs)?
CGD is one of the over 185 PIDs. Unlike many PIDs, CGD patients have the ability to fight viral, but not bacterial or fungal infections. The cell can engulf the germ but the cell lacks the oxygen burst to kill the germ.
Diagnostic Tests for CGD
Dihydrorhodamine test (DHR)
The DHR test has widely replaced the NBT test. It is more accurate. Whole blood is stained with DHR, incubated, and stimulated to produce superoxide radicals which oxidize DHR to rhodamin in cells with normal function. In CGD (X-linked) this does not happen. In the autosomal recessive type, there may be some activity.
Nitroblue tetrazolium dye reduction test (NBT)
The NBT test checks to see if cells can change a colorless chemical (NBT) into a deep blue color, formazan, which is visible on microscopic inspection. In CGD the color does not turn blue, meaning they are not producing reactive oxygen species which is needed to kill bacteria.
What is not CGD
If there are terms such as “granulomatous” “calcified granulomata” “old granulomata” “hilar calcification” “residuals of previous granulomatous disease” on an x-ray report, it suggests that there was an infection, probably many years before, by a bacteria or fungus that tends to form granulomas, which are a particular kind of inflammatory reaction. This could have been pneumonia, etc. This does not mean that there is currently an active infection. This is also not the disease CGD. Many people confuse the two terms.