Hi Joan,
Good to meet you.

Both infection and MS can prduce a positive oligoclonal CSF response.

I think that what has been writtten means that the normal IgG (<0.7) indictes no CSF infection as a the reason why there is a oligoclonal CSF response. Although not conclusive for diagnosis as a stand alone test, that leaves MS as a reason for the positive result more likely.

Have you had other testing done (MRI, evoked potentials etc)?

With love, Erika