Even Fry Labs is admitting the bacteria in their photos may not be bartonella. Last I heard it was a type of betaproteobacteria and Clongen labs believes it is a type of pseudomona. Some pseudomonas are very pathogenic and some are not.
Martha's vineyard? Do you have a positive antibody titer to bartonella? I personally would not do the heavy anitbiotics at all, but certainly not if I was not making antibodies against bart. Just my opinion.