testing for coinfections is even more inaccurate than testing for Borrelia Burgd. It is always possible that the test results for coinfections are false negative. My sister had 3 tests for Bartonella, all negative. Then the dr took a stomach biopsy (cause she had many stomach issues) and pcr tested that for Bartonella: positive! He was sure he had it because of a rash she had on her chest. He just needed a positive test to cover himself so she could start treatment (she didn't have a positive Borrelia test yet, now she has).
Like Healing98 wrote: I was literally run over by Bartonella, still am being run over... she's a mean thing...