Cat scratch fever is Bartonella henselae, but Bartonella has 25 different strains that have been identified, and at this point, there are 9 different strains that have been confirmed in people. I believe that those that do not have a positive test, yet have symptoms or respond to treatment likely have one of the 16 strains that haven't been identified in people - yet. Most tests do not test for all 9 types of Bartonella that have been found in people.
We must also take into consideration any other issues a person may be dealing with, whether it's Lyme or something else, like diabetes or any stressor on the body. They all impact the immune system and how well it responds to the threats.
All of this would also easily explain why some have stronger symptoms in different areas and respond differently to the same protocols and so on - it's a different strain of bacteria, different stressors on the body and so on.
Herb only treatment for Lyme & Bart ended 12/11 - no active symptoms for 2 yrs -Herb only treatment for Babesia ended 12/12www.healingwell.com/community/default.aspx?f=30&m=2977364
Had Lyme, Bart, Babs, RMSF, Ehrlichia, Myco, Anaplasmosis, EBV
New Lyme case 8/2014 - Healed 1/31/15 - unknowingly had Asymptomatic Babs and Asymptomatic Bart, being treated now though (2/2016)