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When should a IgG vs a IgM test be ordered?

2 doctors weighed in
Dr. Michael P Vaughn
Internal Medicine - Allergy & Immunology
1 doctor agrees

In brief: IgM vs. IgG

Igm tests are typically ordered when an infection is thought to be present for one week or more.
Igm levels often disappear within the first few months. Igg testing is typically ordered when the infection has been thought to be present for 2 or more weeks. Igg levels my stay elevated for years after an infection has resolved.

In brief: IgM vs. IgG

Igm tests are typically ordered when an infection is thought to be present for one week or more.
Igm levels often disappear within the first few months. Igg testing is typically ordered when the infection has been thought to be present for 2 or more weeks. Igg levels my stay elevated for years after an infection has resolved.
Dr. Michael P Vaughn
Dr. Michael P Vaughn
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