Based on your history, the cat scratch and positive Bartonella henselae test do make cat-scratch disease a possibility. However, a positive Bartonella antibody test alone does not necessarily mean that you still have an active infection one year later. Serology can remain positive and can also have cross-reactivity with other infections.
Typical cat-scratch disease usually causes a local skin lesion followed by nearby lymph-node enlargement, fever and malaise, and most uncomplicated cases gradually resolve over weeks to months. Neurological or other systemic complications are uncommon.
Since you continue to have weight loss, fatigue, joint pain and particularly radiculopathy for a year, I would not simply assume that all of these symptoms are due to persistent Bartonella. You need a proper reassessment to look for both ongoing Bartonella-related disease and other possible causes of these symptoms.
Please take the actual Bartonella report with the IgM/IgG values and reference ranges, along with all previous investigations and treatment records, to an Infectious Diseases physician/Internal Medicine specialist. Depending on your examination and history, they may decide whether repeat serology, PCR from an appropriate specimen, imaging, neurological evaluation or other investigations are warranted. PCR is a diagnostic option, although its sensitivity varies depending on the specimen and clinical situation.
Next Steps
The good news is that serious complications of B. henselae infection are uncommon, so try not to assume that you necessarily have a dangerous chronic infection. But your persistent symptoms deserve a systematic evaluation rather than simply being dismissed as “self-healing.”
Health Tips
There are established antibiotic treatments for confirmed cat-scratch disease, but prolonged or combination antibiotic treatment should not be started solely on the basis of a positive antibody test, particularly after a year of symptoms. Treatment decisions depend on whether there is evidence of active or complicated infection.