Thanks for bumping this, RW.
My response is similar to Loski's. I don't know about
Vibrant's test specifically, and it's usually difficult to assess what results mean without seeing an image of the actual report, but my guess would be that you were exposed to those infections and therefore are making antibodies to them that are being detected.
A healthy immune system should be making antibodies to an infection you've had, and it might even make those antibodies for the rest of your life, so you might test positive on antibody tests even with no symptoms or active infection. A positive result on an antibody test just means that you have been exposed to something at some point, not that it's necessarily an active infection causing symptoms now. Vaccines also work on this principle: exposure to a pathogen makes your body make antibodies to that pathogen for years, and in the case of a vaccine, provides some protection against future infection. I had a tetanus vaccine, so my body makes tetanus antibodies, and will for many years, but that doesn't mean I have an active tetanus infection or tetanus symptoms. So testing positive on an antibody test unfortunately does not indicate whether further antimicrobial treatment is needed, even though some mistakenly think of re-testing as a way to measure treatment progress. Additionally, the notion that IgG means past infection and IgM means current infection isn't applicable to Lyme, so that's another limitation of even the best Lyme testing.
My read on the results (with the limited information you shared) is that you now know which infections you've been exposed to. If you are not experiencing symptoms, then this is not especially useful information. Seems like with the immediate six weeks of doxycycline (and the many other antimicrobials you have mentioned in other posts) you can relax now and not think about
tick-borne infections anymore.
