Is it possible to have a Lyme infection with a negative IgG but positive igm?

Yes. Igm is the immunoglobulin noted for coming out early in response to any illness, it fades over time while igg come out a bit later and stays up longer. If you have a positive IgM it indicates a early response, while igg would probably show up in a few months at which point the IgM would have declined.

Related Questions

I would like the opinion of a doc who knows lyme. Does a negative IgG and IgM exclude 100% lyme? Got brain lesions, fever for years, anxiety, MS excluded.

Lyme? Tests for this provide mixed results in terms of reliability. Stick close to your doc. If it's lyme there are IV antibiotic specialists. Also, a natural herbal product called dipsacus has been used to kill off the spirochete that produces the symptoms. Been through this myself and i'm fine. Peace and good health. Neuroscience lab in us has specialty tests. Don't know about tests you mention. Read more...
NO, does NOT exclude. One of the reasons there is so much controversy about Lyme is that the tests are imperfect, with both false positives and false negatives. 20-30% of those with Lyme may have a negative Western Blot. With your symptoms I would be very suspicious for Lyme. It is ideal to work with a doctor knowledgeable about Lyme who uses an integrative approach. See http://www.betterhealthguy.com/lyme/testing. Read more...

What would cause a positive Lyme ab screen but negative Lyme IgG and negative IgM very high neutrophils low lymphocytes in my 5yr old daughter?

Lyme tests poor. The lyme tests are poor for lyme disease. The diagnosis of lyme is based on a constellation of symptoms and not on a positive lab test. The western blot which you were describing can be negative in as much as 50% of the people with lyme disease if they have symptoms without an antibody response. Read more...