When someone tests positive for a particular infection or disease, it means that their results indicate that they have the infection or disease in question. In the case of testing for immunoglobulins, or Ig, a positive result means that a person has a higher than normal level of Ig in their blood.
Immunoglobulins are proteins produced by the body's immune system in response to an infection or disease. When Ig levels are high, it indicates that the body is actively fighting off an infection or disease, and a positive result indicates that the person has the infection or disease in question.
The most common reason for testing Ig levels is to diagnose an autoimmune disorder, such as rheumatoid arthritis or lupus. High Ig levels can also indicate an infection or disease such as hepatitis, HIV/AIDS, or other viral infections.
In some cases, a positive Ig result may mean that the person has been exposed to an infection or virus, but does not necessarily mean that they have the infection or disease. This is because the body can produce Ig in response to a virus or bacteria, even if the person does not actually have the infection or disease.
In addition to Ig testing, other tests may be needed to confirm a diagnosis of a particular infection or disease. It is important to remember that a positive Ig result does not necessarily mean that a person has an infection or disease, and further testing may be needed to confirm the diagnosis.