Rob, it looks like you got that directly from the CDC website:
https://www.cdc.gov/bartonella/transmission/index.html
"...Ticks may carry some species of Bartonella bacteria, but there is currently no convincing evidence that ticks can transmit Bartonella infection to humans..."
The Center for Disease Continuance has been historically incompetent in the matters of Lyme disease. I recently interviewed an entomologist on camera and will publish the interview in 3-4 weeks. These topics are covered.
For now, see:
https://rawlsmd.com/health-articles/...ing-bartonella