The current study is set up to chart clinically and laboratory findings in Norwegian patients with symptoms attributed by themselves or their doctor to ongoing chronic Bb infection. Objectives is to assess laboratory findings in relation to established diagnostic criteria and to form a picture of the burden of symptoms and illness perception in this group of patients. The study is essentially exploratory, and is supposed to raise rather than to test hypotheses.

Inclusion Criteria:

• Symptoms attributed by themselves or their doctor to ongoing chronic Bb infection

Exclusion Criteria:

• None

Patients are eligible if they themselves or their physician suspected that they suffer from ongoing chronic Bb infection