Serologic Methods
Serologic methods can be alternative to the PCR test when you notice an unusual rash or when there are not any swabs to take a sample. It works by examining antibodies in the blood to confirm results from a physical exam. Serological could determine 2 forms of antibodies generated by the body when exposed to the virus: IgG and IgM. If results show both antibodies, it may indicate that you have shingles. In people with a weakened immune system, the test may give fault results as their body cannot generate enough antibodies. Even with a positive result, it is important to assess other physical signs to make a precise diagnosis. [3]
