I can't answer your question about "bartonella" have you done a search on something like "bartonellal and leukemia" or and "cancer"? You may get some inputs here if you post again with the "baronella and leukemia" in the subject line.
Hope all news is good news.
Could bartonella have caused Leukemia, or Lymphoma? I was scratched viscously by a sick cat who died the next day. Bartonella is the bacteria that causes cat scratch fever, and is known to cause some kinds of cancers.
Could Bartonella have caused
The only blood test I know of for cancer is the Cancer Market Test, and I believe it is only an indication, not a complete predictor, it may give some false positive results. I suppose if I have that last point right, than a negative is rather certain. That test may be some combination of what you have quoted, I don't know nor do understand what makes you ask/suspect.
Wishing you a cancer free result, and a Happy New Year.