Testing for JC virus: what does it mean? When you are infected with JC virus you develop antibodies to the virus. A test called Stratify JCV can detect the presence and level of these antibodies in your blood, which can be used to estimate your risk of developing PML.
What does a positive JCV antibody mean?
A blood test is the only way to identify the presence of the virus. When someone says that they’re “JCV-positive,” or “JCV+,” they mean that they’ve had a blood test that was positive for anti-JCV antibodies. Most people with MS are likely to have been tested for the JC virus early in their treatment.
What is JCV infection?
The human polyomavirus JC virus (JCV) infects myelin-producing cells in the central nervous system, resulting in the fatal demyelinating disease progressive multifocal leukoencephalopathy (PML).
How does someone get JCV?
The JC virus can be activated when a person’s immune system is compromised because of disease or immunosuppressive medication. The virus can then be carried into the brain.
How is Jcv treated?
No specific therapy exists for JCV infection or PML. The main approach to treatment involves ART to reverse the immunosuppression that interferes with the normal host response to this virus. In patients with PML who are not on therapy, ART should be started immediately (AII).
How is Jcv diagnosed?
Diagnosis. Tests can detect if you carry the JC virus. Your doctor might look at a sample of your tissue under a microscope or check your blood for signs that your body is fighting the infection. This is important to know in case you have a weakened immune system or if you take drugs that suppress your immune system.
What is JCV in MS?
The John Cunningham (JC) virus is a common and usually harmless virus. In rare cases, however, it can have a severe impact on people with multiple sclerosis (MS). At least half of all adults have the JC virus in their system. In most people, it is dormant and does not directly cause health problems.
Is Jcv contagious?
When the virus is in the kidneys, it can come out along with urine and be spread to other people who come into contact with it. Most healthy people will not have any symptoms of an infection and probably won’t realize they’ve been exposed.
How can Jcv be prevented?
Recommendations for Preventing and Treating PML and JCV
- There is no effective antiviral therapy for preventing or treating JCV infections or PML.
- The main approach to treatment is to preserve immune function and reverse HIV-associated immunosuppression with effective ART.
How quickly does PML develop?
It remains inactive in healthy individuals and causes disease only when the immune system has been severely weakened, such as in people with HIV/AIDS, hematological malignancies and those receiving certain immunosuppressant medications. Altogether, PML occurs in approximately one in 200,000 people.
What is the JC virus antibody blood test?
The JC Virus Antibody Blood Test. Antibodies are defensive immune proteins produced by the immune system in response to a disease-causing pathogen like the JC virus. Each antibody is specific to that pathogen and that pathogen alone. Once produced, that antibody will remain in the body to respond in the event the pathogen returns.
Is strstratify JCV™ antibody a reliable indicator of JC virus exposure?
STRATIFY JCV™ Antibody (with Index) with Reflex to Inhibition Assay – The JC Virus (JCV) is associated with progressive multifocal leukoencephalopathy (PML). Detection of antibodies to JCV in serum or plasma is a reliable indicator of exposure to JCV. The analytical performance characteristics were determined for multiple sclerosis patients.
What does a positive JCV serology mean?
In other words, a positive serology only suggests prior exposure to JCV, and not necessarily that the virus is causing an illness in the patient. However, serology is useful in screening patients for exposure to JCV prior to initiating certain immune-modulating therapies, such as natalizumab.
What is the JC antibody test for Tysabri?
The JC antibody test detects antibodies that are specific to this particular virus. A very small percentage of people who take Tysabri will develop PMG. But given the seriousness of the condition, the JC virus antibody test is important for patients taking the drug for more than two years, as it can determine if the risk is there.
