Can lyme disease test be positive after taking doxycycline?

Yes, a Lyme disease test can still be positive after taking doxycycline. Doxycycline is an antibiotic used to treat Lyme disease, but it may not immediately eliminate all antibodies that the body has produced in response to the infection. Consequently, blood tests for Lyme disease can remain positive for some time even after successful treatment. It's important to consult a healthcare provider for interpretation of test results in the context of treatment and symptoms.